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Artificial intelligent KNN; pattern visualization; agarwood quality; grading technique
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Agarwood Oil Grade Clustering of Aquilaria malaccensis Species using Extraction by GC-MS Analysis: Efficient KNN Algorithm Based on Patterns Visualization of Two-dimensional Graph
Data visualization pattern is an essential task in data analysis. A two-dimensional graph (2D graph) is one of the graphical presentations for data visualization. Over the past decades, Agarwood Oil grade clustering is still at a disadvantage since there is no official standard grading system. Most of the time, an expert grades the agarwood oil manually based on oil appearances such as resin color, smell, texture and intensity. The importance of the agarwood oil grading system will help the seller to stabilize the oil price based on its approximate quality. Besides, Agarwood oil got high requests from big buyers and traders due to its benefits as medicine, cosmetics, perfume and incense. This paper attempts to formulate a better Agarwood oil grading system based on its chemical properties, develops an artificially intelligent k-Nearest Neighbor (KNN) and trained using Matlab version R2015a. The data acquisition process of investigating the chemical compounds was conducted using GC-MS analysis. From 103 chemical compounds extracted, four significant compounds; 10-epi-ɤ-eudesmol, α-agarofuran, ɤ-eudesmol and β-agarofuran were chosen to model the agarwood oil quality. The agarwood oil sample data were categorized into low, medium-low, medium-high and high grades. The findings show that KNN yielded 100% accuracy. Then, 2D graph was applied to plot the sample visualization pattern parallel with KNN accuracy. The KNN 2D plot revealed a distinct separation between the four groups. The accuracy of 100% proved the potential of the KNN model as a good supervised learning classifier towards four different grades of Agarwood oil. In conclusion, the Agarwood oil quality grading technique based on KNN and 2D graph was successful with the ability of KNN to confirm these qualities into 4 grades.
[ "Siti Mariatul Hazwa Mohd Huzir - Universiti Teknologi MARA", "Anis Hazirah ‘Izzati Hasnu Al-Hadi - Universiti Teknologi MARA", "Amir Hussairi Zaidi - Universiti Teknologi MARA", "Nurlaila Ismail - Universiti Teknologi MARA", "Zakiah Mohd Yusoff - Universiti Teknologi MARA", "Mohd Nasir Taib - Universiti Teknologi MARA", "Saiful Nizam Tajuddin - Universiti Malaysia Pahang" ]
26 February 2024
Agarwood Oil Grade Clustering of Aquilaria malaccensis Species using Extraction by GC-MS Analysis: Efficient KNN Algorithm Based on Patterns Visualization of Two-dimensional Graph
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-56479ff
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-56479ff
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.324
Agarwood Essential Oil; Grading Technique; Multiclass Support Vector Machine; Confusion Matrix
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
The Capabilities of Multiclass Support Vector Machine (MSVM) Training Algorithms in Grading Agarwood Essential Oil
Agarwood essential has a high economic value around the globe for the use of perfumery, medicinal remedies, incense, and other products in the market. However, there is still no standard grading method. Different countries grade agarwood essential oil differently. Traditionally, the grading expert classifies agarwood essential oil by using the aspect of odor, texture, resin color and intensity. Standard grading method is important to ensure the stability of agarwood essential oil’s market value. This paper purposes to proof the capabilities of multiclass support vector machine (MSVM) training algorithms in grading agarwood essential oil. Multiclass support vector machine has been identified to be a very effective tool for classification. The MSVM was constructed utilizing radial bias function as the kernel function using MATLAB2021b. One versus all strategies have been added to improve the ability of SVM to classify more than four different grades. The holdout was chosen as the partition for the model with 80:20% training and testing data ratio. The data consists of 660 samples for each significant chemical compound. There are eleven significant chemical compounds which consists of 10-epi-δ-eudesmol, α-agarofuran, β-agarofuran, δ-eudesmol, dihydrocollumellarin, valerianol, ar-curcumene, β-dihydro agarofuran, α-guaiene, allo aromadendrene epoxide and δ-cadinene. The agarwood essential was graded into five grades (low, medium low, upper low, medium high, and high) and six grades (low, medium low, upper low, medium high, high, and upper high). The findings of this paper show the confusion matrix for five grades and six grades have no mismatch between actual and predicted data. The model's performance evaluation results were recorded, with all criteria, including accuracy, sensitivity, specificity, and precision, achieved 100%. In conclusion, the model has the capabilities to identify significant agarwood essential oil chemical compounds and separate agarwood essential oil grades into five and six with high accuracy using eleven significant compounds based on the classification evaluated on two different grades of agarwood essential oil.
[ "Anis Hazirah ‘Izzati Hasnu Al-Hadi - Universiti Teknologi MARA", "Siti Mariatul Hazwa Mohd Huzir - Universiti Teknologi MARA", "Nurlaila Ismail - Universiti Teknologi MARA", "Zakiah Mohd Yusoff - Universiti Teknologi MARA", "Mohd Nasir Taib - Universiti Teknologi MARA", "Saiful Nizam Tajuddin - Universiti Malaysia Pahang" ]
26 February 2024
The Capabilities of Multiclass Support Vector Machine (MSVM) Training Algorithms in Grading Agarwood Essential Oil
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-783164b
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-783164b
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.314
Benzylaminopurine; Kaempferia parviflora; micropropagation; silver nitrate surface sterilization
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Establishment of Explant Sterilization Protocol and the Effects of BAP and AgNO3 on In Vitro Multiplication of Kaempferia parviflora Wall. ex Baker
Continuous supply of Kaempferia parviflora plantlets often disrupted by long rhizome bud dormancy period. Rhizome imports from Thailand are required which inflates the cultivation cost. Hence, this study was conducted to establish an alternative cultivation method through in vitro propagation. Rhizome buds were surface sterilized with 100% Clorox® for 3 min, 95% ethyl alcohol for 30 s, 5% Clorox® for 15 min and 0.10% mercuric chloride (HgCl₂) for 10 min giving the highest disinfection percentage (40%). Then, K. parviflora in vitro multiplication were investigated using combinations of benzylaminopurine (BAP) and silver nitrate (AgNO3). Optimum responses were observed in Murashige and Skoog (MS) media with 8 mg/L BAP and 1 mg/L AgNO3 after 30 days, producing shoot number per explant (4.90±0.57), shoot length per explant (5.07±0.33 cm) and root number per explant (9.70±0.58). The results illustrated explants good responses towards BAP and AgNO3 treatments, highlighting in vitro propagation as an alternative for K. parviflora cultivation.
[ "Najat Amanina Jamilkhair - Universiti Teknologi MARA", "Asmah Awal - Universiti Teknologi MARA", "Nurul Izzati Osman - UiTM Puncak Alam Campus", "Nor Hadiani Ismail - UiTM Puncak Alam Campus", "Mohamad Aidil Jantan - Bellus Tara Sdn. Bhd." ]
26 February 2024
Establishment of Explant Sterilization Protocol and the Effects of BAP and AgNO3 on In Vitro Multiplication of Kaempferia parviflora Wall. ex Baker
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-5b25454
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-5b25454
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.332
Dipterocarpaceae; Dipterocarpus; Candida glabrata; anticandidal; time-kill assay; ɛ-viniferin
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Anti-candidal Activity of Crude Extracts and Compounds from Dipterocarpus verrucosus Foxw. Ex Sloot, Dipterocarpus cornutus Dyer and Dipterocarpus crinitus Dyer
Dipterocarpus, commonly known as 'keruing,' is an important source of dammarane and contributes to a highly valuable economic plant in Southeast Asia. A preliminary study revealed that this plant is rich in phenolic compounds and potential antimicrobial properties. Thus, the stem bark of three Dipterocarpus species (Dipterocarpus verrucosus, Dipterocarpus cornutus, and Dipterocarpus crinitus) has been extensively studied chemically and biologically. The methanol extract was isolated using multiple chromatography techniques, and the structural elucidation of the compounds was characterized using UV, IR, NMR (1d &2D), HRESI-MS, and comparison with literature. The anticandidal activity of the methanolic crude extracts and compounds was determined using the disc diffusion method, Minimum Inhibitory Concentration (MIC), Minimum Fungicidal Concentration (MFC), and time-kill assay against pathogenic strains, namely Candida glabrata. In this study, three crude extracts and 12 phytochemicals of consisting of nine stilbenoids (ɛ-viniferin, ampelopsin A, α-viniferin, davidiol A, stenophyllol B, ampelopsin E, vaticanol B, diptoindonesin E, Hemsleyanol D, two phenolic compounds (bergenin, scopoletin) and one compound from terpene (β-sitosterol glucoside) were tested for their anticandidal activity. The disc diffusion method result showed that ε-viniferin was more susceptible to C. glabrata than other compounds; thus, this compound was selected for time-kill assay. The MIC and MFC ranged from 62.5 to 500 ppm. Time-kill curves demonstrated that ε-viniferin could inhibit C. glabrata strains at 500 ppm, after 120 min of treatment with a significant reduction of more than 3 log10 reduction. Results revealed the potential of ɛ-viniferin isolated from Dipterocarpus to be developed as an anticandidal agent against C. glabrata.
[ "Wan Zuraida Wan Mohd Zain - Universiti Teknologi MARA", "Nurain Aziman - Universiti Teknologi MARA", "Nor Asma Husna Yusoff - Institute of Tropical Aquaculture and Fisheries", "Yaya Rukayadi - Universiti Putra Malaysia", "Neneng Windayani - Pascasarjana Universitas Islam Negeri Sunan Gunung Djati Bandung" ]
26 February 2024
Anti-candidal Activity of Crude Extracts and Compounds from Dipterocarpus verrucosus Foxw. Ex Sloot, Dipterocarpus cornutus Dyer and Dipterocarpus crinitus Dyer
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-3b52d1f
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-3b52d1f
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.302
Antifungal; Cyperaceae; LC-MS; phytochemical; plant extracts
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Liquid Chromatography – Mass Spectrometry (LC-MS) Analysis and Antifungal Potential of Cyperus iria, Fimbristylis miliacea, and Fimbristylis globulosa
The plants from the Cyperaceae family have been long used for natural remedies including biopesticides to treat plant pathogens. The species Cyperus iria, Fimbristylis miliacea, and Fimbristylis globulosa contain bioactive compounds such as flavonoids and terpenoids that can be used to treat plant disease including fungal infection on plants. However, there is no reported data on the antifungal potential of the plants on Colletotrichum and Fusarium species, nor phytochemical studies conducted on the species. This study investigates the phytochemical contents of C. iria, F. miliacea, and F. globulosa methanolic extracts using liquid chromatography- mass spectrometry (LC-MS) technique, and their antifungal activity using agar well diffusion method and Minimum Inhibitory and Fungicidal Concentration (MIC & MFC). A total of 131, 60 and 95 compounds mainly from flavonoids, terpenes and fatty acids classes have been detected in the C. iria, F. miliacea, and F. globulosa extracts, respectively. The antifungal activity of the extracts against Colletotrichum spp. showed moderate to good activity with MIC and MFC values of 125 ug/mL and 250 ug/mL, respectively. Their antifungal activity against Fusarium spp. also showed moderate to good activity with MIC and MFC value of 250 ug/mL for C. iria and F. miliacea, and moderate activity for F. globulosa with MIC value of 250 ug/mL and MFC value of 500 ug/mL. These findings were supported by previous studies that Cyperaceae contain secondary metabolites which showed potential antifungal activity of Cyperaceae.
[ "Nina Asqalani Abdullah - Universiti Teknologi MARA", "Wan Zuraida Wan Mohd Zain - Universiti Teknologi MARA", "Fatimah Salim - Universiti Teknologi MARA", "Nurul Wahida Ramli - Universiti Teknologi MARA", "Nur’ Amira Hamid - Universiti Teknologi MARA", "Mohd Salleh Rofiee - Universiti Teknologi MARA" ]
26 February 2024
Liquid Chromatography – Mass Spectrometry (LC-MS) Analysis and Antifungal Potential of Cyperus iria, Fimbristylis miliacea, and Fimbristylis globulosa
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-2c545a6
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-2c545a6
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.287
Piperaceae; Piper ornatum; constituent; flavonoid; amide
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Chemical Constituents from the Leaves and Stems of Piper ornatum N.E.Br (Piperaceae) and their Antioxidant Activity
Plants of the genus Piper have long been used as medicinal herbs. The chemistry of Piper species has been widely investigated, and phytochemicals investigations led to the isolation of a number of physiologically active compounds. This study was carried out to investigate the phyto-chemicals isolated from the leaf and stem extracts of Piper ornatum. Cold extraction of the dried powdered leaf and stem was employed to extract the phytochemicals according to the polarity gradient of hexane, ethyl acetate, and methanol. The phytochemicals were obtained using chromatography techniques (column chromatography and prep-TLC) and their structures were confirmed by spectroscopic analysis (IR, NMR and MS) and comparison with literature. The isolation was successfully led to the identification of 5,7-dimethoxyflavone (1), 4',7-dihydroxy-3',5',5-trimethoxyflavone (2), 4'-hydroxy-3',5',5,7-tetramethoxyflavone (5) and 3',4',5,5',7-pentamethoxyflavone (6), together with piperine (3) and β-sitosterol (4). Compounds (2) and (3) showed significant activity towards DPPH radical scavenging (concentration 1,000 μg/mL) with percentage inhibition of 47.5% and 41.5%, respectively. This study may provide valuable and useful information and indications for further exploring the potential nutraceutical and pharmaceutical applications of the Piper species.
[ "Nik Nur Asyiqin Nik Mohammed Ainul Azman - Universiti Pendidikan Sultan Idris", "Wan Mohd Nuzul Hakimi Wan Salleh - Universiti Pendidikan Sultan Idris", "Abubakar Siddiq Salihu - Universiti Pendidikan Sultan Idris", "Nurunajah Ab Ghani - Universiti Teknologi MARA", "Nurulfazlina Edayah Rasol - Universiti Teknologi MARA" ]
26 February 2024
Chemical Constituents from the Leaves and Stems of Piper ornatum N.E.Br (Piperaceae) and their Antioxidant Activity
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-ebc1e9f
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-ebc1e9f
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.265
Alphonsea elliptica; Annonaceae; essential oil; cytotoxicity; lipoxygenase; β-caryophyllene
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Chemical Profiling and Biological Activities of Alphonsea elliptica (Annonaceae) Essential Oil
The chemical composition of the essential oil from the leaves of Alphonsea elliptica (Annonaceae) growing in Malaysia was investigated for the first time. The essential oil was obtained by hydrodistillation and fully characterized by gas chromatography (GC-FID) and gas chromatography-mass spectrometry (GC-MS). A total of 45 components (98.4%) were successfully identified in the essential oil, which were characterized by high proportions of β-caryophyllene (20.2%), β-elemene (8.6%), α-humulene (8.5%), germacrene D (7.2%), and bicyclogermacrene (6.0%). The cytotoxicity of the essential oil was evaluated using an MTT assay. The essential oil exhibited cytotoxicity against three cancer cell lines, which are HepG2, MCF7, and A549, with the IC50 values 75.2, 65.8, and 68.5 μg/mL, respectively. The tested essential oil showed moderate in vitro lipoxygenase activity with an IC50 value 64.8 μg/mL. The present study highlights the potential of using essential oil as an alternative for developing chemopreventive or cosmetic agents for the pharmaceutical industry.
[ "Wan Mohd Nuzul Hakimi Wan Salleh - Universiti Pendidikan Sultan Idris", "Abubakar Siddiq Salihu - Universiti Pendidikan Sultan Idris", "Nurunajah Ab Ghani - Universiti Teknologi MARA", "Salam Ahmed Abed - University of Kerbala" ]
26 February 2024
Chemical Profiling and Biological Activities of Alphonsea elliptica (Annonaceae) Essential Oil
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-1c1269a
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-1c1269a
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.281
Lauraceae; Lindera; essential oil; multivariate; PCA; HCA
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Assessment of Variability of Essential Oil Components in the Genus Lindera (Lauraceae) by Multivariate Analysis
Essential oils hold tremendous medicinal attributes and are greatly exploited industrially worldwide. Lindera is an important genus of the Lauraceae family of plants which are known for their medicinal values. In the present study, eleven studies reported on Lindera essential oils were selected and reviewed. Then the variability of essential oil components in the genus Lindera were assessed by multivariate analysis. The chemical analysis enabled the identification of qualitative and quantitative differences among the essential oils. The essential oils were characterized by high proportions of germacrene B, spathulenol, nerolidol, β-caryophyllene, dihydromyrcene, furanosesquiterpenoid, sesquithuriferol, and linalool. Then, the differences in the chemical profiles of the essential oil were confirmed by the multivariate statistical analysis, which was determined via principal component analysis (PCA) and hierarchical clustering analysis (HCA). The analysis classified the Lindera species into four different clusters. Group A of cluster analysis (L. obtusiloba) was highly correlated with α-copaene and β-eudesmol and group B of cluster analysis (L. strychnifolia, L. umbellata and L. pulcherrima) were highly correlated with linalool and 1,8-cineole. Moreover, group C of cluster analysis (L. erythrocarpa, L. pipericarpa, L. nacusua and L. glauca) were highly correlated with spathulenol, α-humulene and β-phellandrene, whereas for group D (L. chunii, L. communis and L. fragrans) were highly correlated with β-farnesene and β-caryophyllene. This data analysis may be used for the identification and characterization of essential oils from different Lindera species that are to be used as raw materials of traditional herbal products. However, there is much variation in the essential oil compositions of Lindera essential oils, both within subspecies and between geographical locations; much additional investigation is necessary to more fully characterize the volatile phytochemistry of this plant.
[ "Nur Nabilah Mohd Zaini - Universiti Pendidikan Sultan Idris", "Wan Mohd Nuzul Hakimi Wan Salleh - Universiti Pendidikan Sultan Idris", "Abubakar Siddiq Salihu - Universiti Pendidikan Sultan Idris", "Shazlyn Milleana Shaharudin - Universiti Pendidikan Sultan Idris" ]
26 February 2024
Assessment of Variability of Essential Oil Components in the Genus Lindera (Lauraceae) by Multivariate Analysis
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-7b9a890
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-7b9a890
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.271
Mycotoxin; Aspergillus flavus; plant products; medicinal herb; antifungal activity
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Efficacy of Kleinia odora Essential Oil on Aspergillus flavus Link Ex Fries Growth and Aflatoxin B1 Production
Aflatoxin contamination in food products continues to be one of the most important food safety concerns worldwide. Aspergillus flavus and A. parasiticus are the primary producers of aflatoxins. Among the different aflatoxin types aflatoxin B1 (AFB1) is the most harmful foodborne mycotoxin. In this study, essential oil (EO) was extracted from Kleinia odora and its effect on A. flavus growth and AFB1 production was evaluated under in vitro condition. K. odora EO (KOEO) effectively suppressed A. flavus growth which resulted in a 43.1% reduction in mycelial weight over the control at a dose of 100 μL/50 mL of medium. The KOEO suppressed the toxin production by A. flavus in a dose-dependent manner and suppressed AFB1 production up to 93.7% at the concentration of 100 μL/50 mL as determined by liquid chromatography-mass spectrometry analysis. The chemical analysis of KOEO by gas chromatography-mass spectrometry showed the presence of ledol (21.0%), caryophyllene (12.0%), gamma-curcumene (10.2%), 4(10)-thujene (9.9%) and D-limonene (7.6) as major constituents. These compounds have been demonstrated to have a wide range of biological properties including antimicrobial activity. These results suggest that KOEO has huge potential to be used as a bio-preservative to suppress A. flavus growth and to minimize aflatoxin contamination in food products.
[ "Aisha Salim Khalfan Al-Shuali - Sultan Qaboos University", "Majida Mohammed Ali Al-Harrasi - Sultan Qaboos University", "Issa Hashil Al-Mahmooli - Sultan Qaboos University", "Jamal Nasser Al-Sabahi - Sultan Qaboos University", "Abdullah Mohammed Al-Sadi - Sultan Qaboos University", "Rethinasamy Velazhahan - Sultan Qaboos University", "Khalid Al-Farsi - Oman Botanic Garden" ]
26 February 2024
Efficacy of Kleinia odora Essential Oil on Aspergillus flavus Link Ex Fries Growth and Aflatoxin B1 Production
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-32698a2
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-32698a2
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.257
Commelinaceae; Tradescantia spathacea; phytochemical study; antioxidant; antibacterial
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Evaluation of Phytochemicals, Antioxidant and Antibacterial Properties of Tradescantia spathacea Leaf Extracts
Tradescantia spathacea Sw. (T. Spathacea) belongs to the Commelinaceae family and has a wide range of pharmacological activities. This study aims to identify the classes of phytochemicals through phytochemical screening, quantify the antioxidant content via total phenolic content (TPC) and total flavonoid content (TFC) analyses, evaluate the antioxidant activity via DPPH free radical scavenging activity and ferric-reducing antioxidant power (FRAP) assays and analysis of the antibacterial properties of leaf extracts via disc diffusion (DF) and broth microdilution (MD) assays. Phytochemical screening of the extracts revealed the presence of terpenes, alkaloids, flavonoids, glycosides, and quinones. The ethyl acetate extract showed the best TPC and TFC values of 84.5 ± 0.6 mg GAE/g DW and 33.6 ± 3.0 mg CE/g DW, respectively. Ethyl acetate leaf extracts also exhibited good antioxidant properties in the DPPH assay and FRAP assay with EC50 values of 288 ± 36 µg/mL and 12.18 ± 0.12 mmol Fe2+/g DW, respectively. The results of the antibacterial assay revealed that ethyl acetate leaf extracts were active against S. aureus, E. coli, and A. baumannii with the MIC value of 5 mg/mL, respectively. To date, the antibacterial activity of T. spathacea leaf extract against E. faecium and A. baumannii has not been reported. The results showed that T. spathacea is a potential source of natural antioxidants and antibacterial agents.
[ "Xin-Yi Keng - Tunku Abdul Rahman University Management and Technology", "Chi Wah Bryan Lim - Tunku Abdul Rahman University Management and Technology", "Khye-Er Loh - Tunku Abdul Rahman University Management and Technology", "Hui-Yin Tan - Tunku Abdul Rahman University Management and Technology", "Siow-Ping Tan - Tunku Abdul Rahman University Management and Technology" ]
26 February 2024
Evaluation of Phytochemicals, Antioxidant and Antibacterial Properties of Tradescantia spathacea Leaf Extracts
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-19970eb
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-19970eb
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.247
Gold; recovery; thiosulfate; hydrogen peroxide; yield
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
Gold Recovery from Thiosulfate Solutions using Hydrogen Peroxide
Gold recovery from pregnant leach solutions like pregnant thiosulfate leach solutions from gold-containing solid wastes (e.g., e-waste) has gained considerable research attention in recent years due to the high market value and limited supply of gold. Although hydrogen peroxide (H2O2) is known as a green reducing agent since it liberates water and oxygen only as reaction by-products, recovery of gold from thiosulfate solutions via H2O2 reduction is still scarce. Hence, this work aimed to recover gold from thiosulfate solutions using H2O2 as a reducing agent. The reduction experiments were carried out by mixing gold(III)-containing thiosulfate solutions with H2O2, and the effects of different initial gold(III) concentrations (10-500 ppm), H2O2 concentrations (0.05-2 M), reaction temperatures (25-65°C) on the gold recovery yield were investigated. The highest gold yield of over 98% was achieved with an initial gold(III) concentration of 500 ppm and a H2O2 concentration of 2 M at 60°C. Therefore, H2O2 is a potential reducing agent for the recovery of gold from thiosulfate solution.
[ "Muhammad Irsyad Roslan - Universiti Teknologi MARA", "Siu Hua Chang - Universiti Teknologi MARA", "Chan Juinn Chieh Derek - Universiti Sains Malaysia", "Mohamad Anuar Kamaruddin - Universiti Sains Malaysia", "Eric D. van Hullebusch - Université Paris Cité" ]
26 February 2024
Gold Recovery from Thiosulfate Solutions using Hydrogen Peroxide
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-e724f38
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-e724f38
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.240
Ethnomedicine; Ethnopharmacology; yellow root; Arcangelisia flava
Vol 26 No 1 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
A Review of Ethnomedicine, Phytochemistry, and Pharmacological Studies on Yellow Roots (Arcangelisia flava (L.) Merr.)
Yellow Root (Arcangelisia flava (L.) Merr.), a member of the Menispermaceae family, is a plant used in traditional Asian medicine, particularly in Indonesia, Malaysia, and the Philippines. This article attempts to summarise, based on scientific literature, the extensive ethnopharmacology, phytochemistry, and toxicology of this plant. Some bioactive of this plant may have multi-dimensional health benefits and provide a new foundation for future research on the mechanism and the creation of more effective medicinal agents and healthy products. Recent research has shown that this plant possesses a wide range of pharmacological properties, including aphrodisiac, anti-microbial, anti-depressant, anti-diarrhea, anti-helminthic, anti-inflammatory, anti-cancer, anti-malaria, antioxidant, atherosclerosis, jaundice, anti-diabetes, hyperlipidemia, and cardioprotective. No clinical trials have been conducted, which is a limitation of this review. Consequently, the effect of yellow roots on humans remains unknown; therefore, further research is required to explore the advanced clinical therapeutic applications and develop valuable products for this plant's commercial market of bioactive candidates for designing appropriate pharmaceuticals and complementary and effective medicines.
[ "Rizki Rahmadi Pratama - Airlangga University", "Sukardiman - Airlangga University", "Retno Widyowati - Airlangga University", "Dina Ahsana - Universitas Muhammadiyah Surakarta", "Ram Kumar Sahu - Hemvati Nandan Bahuguna Garhwal University" ]
26 February 2024
A Review of Ethnomedicine, Phytochemistry, and Pharmacological Studies on Yellow Roots (Arcangelisia flava (L.) Merr.)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0048-0503c74
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0048-0503c74
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0048
https://doi.org/10.55373/mjchem.v26i1.224
Bioplastic; cassava starch; citric acid; palm oil
Vol 25 No 3 (2023): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0044
The Mechanical and Water Barrier Properties of Cassava Starch/Citric Acid Incorporated with Palm Oil
Starch-based bioplastic is susceptible to degradation due to water absorption. The addition of citric acid and palm oil may improve the mechanical and water permeability of bioplastic films produced with cassava starch. In this study, four bioplastic films were prepared with different concentrations of citric acid (5% and 10% w/w) and palm oil (2% and 4% w/w) using the solution casting method and glycerol as the plasticizer. To determine the influence of citric acid and palm oil on the films, physical (i.e., thickness, tensile strength, elongation at break, moisture absorption, moisture content, water vapor permeability, and water contact angle) and chemical analyses (i.e., thermogravimetric analysis, differential scanning calorimetry, and Fourier transform infrared spectroscopy) were measured. Bioplastic film containing 5% citric acid and 2% palm oil (Sample E) has the highest tensile strength (1.60 MPa) and the lowest water vapor permeability (1.16±0.02% w/w). The analyses of differential scanning calorimetry and Fourier transform infrared spectroscopy have confirmed that the enhanced mechanical properties were due to the formation of crosslinks. Moreover, crosslinks may have increased the bulkiness and the water contact angle. The addition of palm oil further increased the water contact angle to enhance the resistance of cassava starch film against moisture absorption and water vapor permeability.
[ "Anis Amirah Azman - Universiti Teknologi MARA", "Freddawati Rashiddy Wong - Universiti Teknologi MARA", "Sharil Fadli Mohamad Zamri - Universiti Teknologi MARA", "Soon Kong Yong - Universiti Teknologi MARA" ]
29 June 2023
The Mechanical and Water Barrier Properties of Cassava Starch/Citric Acid Incorporated with Palm Oil
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0044-f386c49
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0044-f386c49
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0044
https://doi.org/10.55373/mjchem.v25i3.378
Molybdenum disulphide; response surface methodology; photodegradation; perfluorooctanoic acid
Vol 25 No 3 (2023): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0044
Photocatalytic Degradation of Perfluorooctanoic Acid (PFOA) using Molybdenum Disulphide-Graphene Oxide Composite via Box-Behnken Design Optimization
In this research work, molybdenum disulphide-graphene oxide (MoS2-GO) was synthesized to be a promising photocatalyst for the degradation of perfluorooctanoic acid (PFOA) by using a photoreactor equipped with an 18-watt fluorescent lamp. Box–Behnken design (BBD) was applied to optimize parameters such as mixing ratio MoS2 in GO (A: 0% ,7.5% ,15%), pH (B: 2, 6, 10), catalyst dose (C: 5 mg, 12.5 mg, 20 mg), and contact time (D: 10 min, 65 min, 120 min). The highest PFOA degradation efficiency of 87.5% was observed for mixing ratio MoS2 with GO (%), pH, catalyst dose, and contact time were 15%, pH 6, 12.5 mg, 120 min, respectively. Besides, dual interactions such as AC, BD and CD were identified to be significant in this BBD model. The optimization from this study demonstrated a superior photodegradation of PFOA in fewer trials, which was time saving and cost effective. Therefore, the results of this research may pave the way for more important applications down the road, including the treatment of actual wastewater, elimination of organic pollutants, and minimization of chemical discharge.
[ "Syafarina Farisa Sateria - Universiti Teknologi MARA Cawangan Negeri Sembilan Kampus Kuala Pilah", "Izyan Najwa Norsham - Universiti Teknologi MARA Cawangan Negeri Sembilan Kampus Kuala Pilah", "Kavirajaa Pandian Sambasevam - Universiti Teknologi MARA Cawangan Negeri Sembilan Kampus Kuala Pilah", "Siti Nor Atika Baharin - Universiti Teknologi MARA Cawangan Negeri Sembilan Kampus Kuala Pilah" ]
29 June 2023
Photocatalytic Degradation of Perfluorooctanoic Acid (PFOA) using Molybdenum Disulphide-Graphene Oxide Composite via Box-Behnken Design Optimization
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0044-3f720d0
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0044-3f720d0
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0044
https://doi.org/10.55373/mjchem.v25i3.368
Metronidazole nanoparticle; UV/Vis spectroscopy; local drug delivery; eriodontal disease
Vol 25 No 3 (2023): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0044
Development of Ultraviolet Spectroscopic Method for the Estimation of Metronidazole Nanoparticles for Periodontal Disease Treatment
In periodontitis treatment, metronidazole (MT) is applied topically to reduce systemic side effects and reach the target site. treatment of periodontitis via sustained MT release. The UV-spectrophotometer analysis was developed and validated to quantify the encapsulated MT according to ICH Q2 (R1) guidelines, which include parameters such as specificity, linearity, accuracy, precision (in the form of repeatability), the limit of detection (LOD) as well as the limit of quantification (LOQ), range, robustness, and ruggedness. Metronidazole nanoparticles (MT-NP) were fabricated at different concentrations (0.15–0.60 mg/mL) using ionic gelation. The encapsulated MT was examined using a UV spectrophotometer, a Nano Zetasizer, Fourier transform infrared spectroscopy (FTIR), and a field emission scanning electron microscope (FESEM). The maximum wavelength (max) was discovered to be 320 nm, and it obeyed Beer's law with a linear relationship (R2 = 0.999) in the range of 2-12 µg/mL. The parameters analyzed met ICH Q2 (R1) standards. MT-NP had a spherical structure and absorption band similar to chitosan empty (CS), with a size of 308.0 ± 9.18 nm, a polydispersity index of 0.374 ± 0.37, 46.6 ± 0.23, and an encapsulation efficiency of 87.95 ± 0.07. These findings suggest that UV-visible can be a useful tool for the estimation of MT nanoparticles and MT-NP as promising local antibacterial agents to treat periodontitis.
[ "Nora Azirah Mohd Zayi - International Islamic University Malaysia", "Muhammad Lutfi Mohamed Halim - International Islamic University Malaysia", "Ahmad Fahmi Harun Ismai - International Islamic University Malaysia", "Mohd Yusof Mohamad - International Islamic University Malaysia" ]
29 June 2023
Development of Ultraviolet Spectroscopic Method for the Estimation of Metronidazole Nanoparticles for Periodontal Disease Treatment
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0044-db79064
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0044-db79064
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0044
https://doi.org/10.55373/mjchem.v25i3.354
Copper oxide (CuO); printed circuit boards (PCBs); tetracycline
Vol 25 No 2 (2023): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
Environmentally Friendly Synthesis of Copper Oxide Nanoparticles from Waste Printed Circuit Boards as Photocatalyst in the Photodegradation of Tetracycline
Printed circuit boards (PCBs), can be found in any piece of electrical or electronic equipment. By recycling PCBs, copper oxide nanoparticles (CuO NPs) can be obtained, the use of which as photocatalyst has garnered a lot of attention. In this study, the recovery of CuO NPs from PCBs was presented using two approaches; hydrothermal and ammonia leaching methods. For the hydrothermal method, CuO in waste PCBs was leached out using nitric acid while the ammonia leaching method involves the leaching in ammoniacal/ammonium salt solutions. X-ray diffraction analysis showed the pure crystalline phase of CuO NPs. Field emission scanning electron microscopy images showed almost spherically-shaped NPs, with sizes ranging from 45.04 to 172.09 nm. The nitrogen sorption analysis shows the CuO NPs exhibit a type V isotherm with a pore size distribution of between 41.1 to 46.3 nm and a surface area that ranges from 3.6 to 6.8 m2/g. The percentage of tetracycline degradation by CuO from the hydrothermal and ammonia leaching methods were 33.77% and 60.89% under UV light, respectively, and 40.61% and 64.24% under visible light, respectively, after 180 min. This study proved that CuO NPs obtained from waste PCBs showed good photocatalytic performance in the degradation of organic pollutants.
[ "Fariha Maryam Muhammad Faisal - Universiti Teknologi Malaysia", "Sheela Chandren - Universiti Teknologi Malaysia", "Santush Suras Kumar - Universiti Teknologi Malaysia" ]
09 March 2023
Environmentally Friendly Synthesis of Copper Oxide Nanoparticles from Waste Printed Circuit Boards as Photocatalyst in the Photodegradation of Tetracycline
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0043-5740010
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0043-5740010
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
https://doi.org/10.55373/mjchem.v25i2.153
Stille reaction; palladium; copper; nickel; catalyst; optimization
Vol 25 No 2 (2023): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
A Mini Review on the Effect of Bases, Catalyst Loading, Temperature and Solvents in the Stille Cross-Coupling Reaction using Pd(II), Cu(I, II) and Ni(II) Complexes as Homogeneous Catalysts
Stille reaction is one of the most common, efficient and selective Pd-catalyzed cross-coupling reactions for the construction of C-C bonds in organic synthesis. It was initially achieved and reported in 1978 by J. K. Stille and D. Milstein. This reaction is based on organotin compounds in the presence of palladium(II) complex as catalyst which can be performed in mild reaction conditions. This review solely focused on the transition of innovation from palladium to other transition metals i.e. copper(I, II) and nickel(II), and emphasized on their catalytic capacity and mechanistic details. The optimization of reaction conditions is also reviewed in this paper by varying the types of bases, amounts of catalysts, temperatures and types of solvents. The catalytic optimization is essential because optimum reaction conditions directly influence the yield of product formed. This review also focused on the effect of aryl halides towards Stille reaction in which electron-withdrawing and electron-donating substituted aryl halides were converted to their corresponding biphenyl products by Stille reaction.
[ "Nur Nabihah Muzammil - Universiti Teknologi MARA", "Hadariah Bahron - Universiti Teknologi MARA", "Amalina Mohd Tajuddin - Universiti Teknologi MARA" ]
09 March 2023
A Mini Review on the Effect of Bases, Catalyst Loading, Temperature and Solvents in the Stille Cross-Coupling Reaction using Pd(II), Cu(I, II) and Ni(II) Complexes as Homogeneous Catalysts
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0043-946bbb3
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0043-946bbb3
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
https://doi.org/10.55373/mjchem.v25i2.127
Charcoal; black carbon; biochar; activated carbon; lead
Vol 25 No 2 (2023): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
Sorption of Lead from Aqueous System using Palm Kernel Shell Biochar: Kinetic and Isotherm Studies
A cost-effective treatment for lead (Pb)-contaminated wastewater has been a challenge due to the high consumption of costly chemicals. Palm kernel shell (PKS) has been used as a solid fuel for boilers. An incomplete combustion produces a by-product called PKS biochar that can be used as a sorbent for the removal of Pb from wastewater. The objectives of this study are to determine the optimized sorption parameters and to study the Pb sorption mechanism of PKS biochar using non-linear kinetics and isotherm models. The maximum Pb removal was achieved at a PKS biochar dosage of 1.25 g/L, and pH 5. The sorption data were best described by the Langmuir isotherm model (R2: 0.9478) and the pseudo-second order model (R2: 0.9317). The Langmuir maximum Pb sorption capacity of PKS biochar was 7.48 mg/g. The decrease of CEC and intensity of the -OH band in FTIR spectra indicate a net loss of negative-charge oxygen functional groups via decarboxylation and decarbonylation. The slightly increased iodine number and BET surface area corroborated with proximate analysis, showing that pyrolysis at 500 C did not eliminate volatile matter from the pore of PKS biochar, The sorption process may have involved the formation of the Pb monolayer on the surface of PKS biochar, and indicate the rate-limiting step of the Pb sorption process is the formation of strong chemical bonds.
[ "Soon Kong Yong - Universiti Teknologi MARA", "Sylbialin Amin - Universiti Teknologi MARA", "Chia Chay Tay - Universiti Teknologi MARA", "Nur Firdaus Abdul Rashid - Universiti Teknologi MARA", "Nur Qursyna Boll Kassim - Universiti Teknologi MARA", "Vianney Siging - Universiti Teknologi MARA" ]
09 March 2023
Sorption of Lead from Aqueous System using Palm Kernel Shell Biochar: Kinetic and Isotherm Studies
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0043-3d6ba6b
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0043-3d6ba6b
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
https://doi.org/10.55373/mjchem.v25i2.117
Mixed matrix membrane; graphene oxide as fillers; cellulose acetate as polymer matrix; removal of Cu2+ ion
Vol 25 No 2 (2023): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
Adsorption of Copper Ions from Environmental Water Samples by Graphene Oxide/Cellulose Acetate- Mixed Matrix Membrane
Nowadays, the removal process of heavy metal ions by utilizing membrane technology, such as mixed matrix membrane (MMM), has many advantages, such as high effectiveness in adsorption performance and cost, rapid and simple procedures. In this study, a composite mixed matrix membrane, namely graphene oxide-cellulose acetate (GO/CAM-MMM) is developed. Cellulose acetate (CA) is a biodegradable polymer, and graphene oxide (GO) has high abundancy with oxygen-containing functional groups and has been widely utilized as an adsorbent. The GO/CAM-MMM has been characterized using Fourier transform Infrared (FTIR) spectroscopy and field emission scanning electron microscopy (FESEM) and used as an adsorbent to remove Cu2+ ions in water samples. A maximum adsorption capacity of 143 mg/g at 30 min of contact time for the removal of 50 ppm of Cu2+ ion at pH 5 of water samples was achieved by the best-performing MMM, which was fitted with a Langmuir isotherm and a pseudo-second-order kinetic study. Thus, the developed membrane has good potential for Cu2+ ions removal from aqueous solution and can be utilized for real waste water treatment due to its simple preparation, low cost and time.
[ "Sazlinda Kamaruzaman - Universiti Putra Malaysia", "Nur Najihah Mohammad Nasir - Universiti Putra Malaysia", "Ili Syazana Johari - Universiti Putra Malaysia", "Noorfatimah Yahaya - Universiti Sains Malaysia", "Saw Hong Loh - Universiti Malaysia Terengganu" ]
09 March 2023
Adsorption of Copper Ions from Environmental Water Samples by Graphene Oxide/Cellulose Acetate- Mixed Matrix Membrane
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0043-fba0eb8
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0043-fba0eb8
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
https://doi.org/10.55373/mjchem.v25i2.138
River water; cations; anions; hydrochemical; sewage pollution
Vol 25 No 2 (2023): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
Evaluation of Sewage Pollution in the Linggi River Water using Hydrochemical Parameters
Sewage pollution in the river water ecosystem has created many environmental problems worldwide. Hydrochemistry studies on river water have been used as a promising tool to comprehend the sewage pollution status in freshwater. This study examines the concentration of anions (nitrate, sulfate, phosphate, fluoride, and chloride) and cations (sodium, potassium, magnesium, and calcium) in the river water samples during the dry and rainy seasons. The determination of anions and cations was carried out using established American Public Health Association (APHA) methods. From the results, alkalinity was the highest parameter during both seasons, with the mean value of 35.73 ± 13.63 and 17.28 ± 6.26 mg L-1 during the dry and rainy seasons, respectively. The correlation between nitrate and chloride revealed diverse anthropogenic sources including sewage during the dry season than the rainy season. On the other hand, the correlation between sodium and chloride indicates significant natural input during the dry season and significant sewage input during the rainy season in the Linggi River. Further chemical and biological analysis must be examined to complement the hydrochemical para-meters towards better assessment of sewage pollution in the river water.
[ "Munirah binti Abdul Zali - Universiti Sultan Zainal Abidin (UNiSZA)", "Hafizan Juahir - Universiti Sultan Zainal Abidin (UNiSZA)", "Masni Mohd Ali - Universiti Kebangsaan Malaysia", "Ananthy Retnam - Department of Chemistry", "Azrul Normi Idris - National Hydraulic Research Institute of Malaysia (NAHRIM)", "Anuar Sefie - National Hydraulic Research Institute of Malaysia (NAHRIM)", "Ismail Tawnie - National Hydraulic Research Institute of Malaysia (NAHRIM)" ]
09 March 2023
Evaluation of Sewage Pollution in the Linggi River Water using Hydrochemical Parameters
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0043-9542596
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0043-9542596
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0043
https://doi.org/10.55373/mjchem.v25i2.110
Virgin coconut oil; biodiesel; fermentation; transesterification, yeast
Vol 26 No 3 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0050
Fermentation of Coconut Milk into Virgin Coconut Oil Using Yeast for Biodiesel Production
Virgin coconut oil (VCO) widely used in food industries, pharmaceuticals as well as beauty industries. Currently, the source of fossil fuels is facing extinction and is predicted to last for only another 50 years. Biodiesel produced by VCO has been indicated to be the perfect substitute for diesel. However, the methods for producing VCO such as heating cost a lot money, energy and time. The fermentation method has been shown to be the most convenient method for producing VCO. This research aims to find the best method for producing VCO for biodiesel production. Specifically, this research aims to determine the yield of VCO produced by the fermentation technique using four types of yeast namely bread yeast, tapai yeast, tempeh yeast and bread yeast with the addition of pineapple extract at different times of fermentation. The result of the organoleptic test, free fatty acids (FFA) test, and iodine test were compared, and VCO was then converted into biodiesel by transesterification using different amounts of catalyst to calculate its percentage yield. The results show that the highest yield percentage of VCO is 28.1% via the fermentation of tapai yeast for 18 hours with an FFA value of 0.8%. For biodiesel production, the transesterification of VCO produced using tapai yeast with 0.3 wt% potassium hydroxide (KOH) showed the highest yield percentage at 7 minutes (81.9%). In conclusion, the fermentation of coconut milk using 0.2 g of tapai yeast at 18 hours is the best method for producing VCO. Additionally, transesterification using 0.3 wt% KOH at 7 minutes is the best condition for biodiesel conversion.
[ "Arslin Rasyiqah Abdul Rahman - Universiti Teknologi Mara (UiTM) Cawangan Negeri Sembilan", "Salma Samidin - Universiti Kebangsaan Malaysia", "Azizul Hakim Lahuri - Universiti Putra Malaysia Bintulu Campus", "Norliza Dzakaria - Universiti Teknologi Mara (UiTM) Cawangan Negeri Sembilan" ]
25 June 2024
Fermentation of Coconut Milk into Virgin Coconut Oil Using Yeast for Biodiesel Production
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0050-d40deb4
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0050-d40deb4
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0050
https://doi.org/10.55373/mjchem.v26i3.465
Heavy metal; pollution index; ICP-OES; Selangor river; WQI
Vol 26 No 3 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0050
Assessment of Water Quality and Heavy Metals Concentration in Selangor River
From a practical and strategic point of view, the Selangor River is crucial to Malaysia's water supply. The nature of the principal pollutant sources may change from rural to industrial, causing a wide range of environmental problems and competing priorities among water users. The Water Quality Index (WQI) is a numerical metric used to evaluate and describe the overall quality of water in a given water body such as river, lake, or ocean. It is calculated by taking into account on several physical, chemical, and biological parameters/factors (turbidity, pH, total nitrogen, COD, BOD) that are known to impact the suitability of water for various uses, such as consumption/ drinking, household chores, irrigation, recreation, and aquatic life. This study was conducted to determine the water quality status of Selangor River. Water sampling was conducted at ten (10) different locations during October 2022. Heavy metals such as Nickel (Ni), Lead (Pb), and Zinc (Zn) were analysed using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). This study found that the water quality index of Selangor River was classified as Class III, which was considered slightly polluted according to the classification of WQI. The mean concentrations of Ni, Pb, and Zn in Selangor River were 1.4±0.07 µg/L, 17.50±0.66 µg/L, and 5.67±0.13 µg/L, respectively. Moreover, a positive and robust significant correlation was identified between temperature and COD, BOD5 with TSS, and Ni, as well as between Ni and Ammoniacal Nitrogen (AN). The results of this study could be useful to the authorities and government in carrying out continuous environmental assessments so that our pollution levels can be monitored.
[ "Nadasofa Mohd Saidi - Universiti Teknologi Mara (UiTM)", "Sabarina Md Yunus - Universiti Teknologi Mara (UiTM)", "Nur Aliah Zaizisham - Universiti Teknologi Mara (UiTM)", "Nik Azlin Nik Ariffin - Universiti Teknologi Mara (UiTM)" ]
25 June 2024
Assessment of Water Quality and Heavy Metals Concentration in Selangor River
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0050-7170490
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0050-7170490
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0050
https://doi.org/10.55373/mjchem.v26i3.445
Adsorption, isotherm; iron oxide nanoparticles; landfill leachate
Vol 26 No 3 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0050
Kinetic, Isotherm, and Thermodynamic Studies of the Removal of Dissolved Chemical Oxygen Demand (dCOD) from Landfill Leachate by Iron Oxide Nanoparticles (IONPs)
This study was conducted to investigate the efficiency of the adsorption of iron oxide nanoparticles (IONPs) for the removal of dissolved chemical oxygen demand (dCOD) in landfill leachate. The IONPs were directly prepared via the sodium borohydride (KBH4) reduction method. Adsorption kinetics, isotherm, and thermodynamic studies are developed to design the model for dCOD removal. Pseudo-first-order (PFO) and pseudo-second-order (PSO) models have been studied to fit the experimental data. The regression results showed that a PSO model represented the adsorption kinetics more accurately. The Weber–Morris intraparticle diffusion model was used to analyse the adsorption kinetics data. The plot of qt versus t1/2 represents multilinearity, which showed that the adsorption processes occurred in more than one step. Adsorption isotherms were analysed using the Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich (D-R), and isotherms model. Equilibrium data were well fitted to the D-R isotherm model. The Langmuir model was used to calculate the maximum monolayer adsorption, which demonstrated a value of 69.44 mg/g. Thermodynamic parameters, such as free energy changes (ΔG°), enthalpy (ΔH°), and entropy (ΔS°), were evaluated between the temperatures of 25°C and 40°C. The ΔG° was noticed to have progressively decreased from −10.68, −10.87, −11.07, and −11.27 kJ/mol with increasing temperature. The ΔH° and ΔS° values were found to be 1.23 kJ/mol and 39.96 J/mol.K, respectively. The results showed that the overall adsorption process was endothermic and spontaneous. This suggested that the IONPs could be a viable adsorbent in managing higher dCOD problems associated with landfill leachate.
[ "Zaidi Ab Ghani - Universiti Teknologi MARA Perlis Branch", "Mohd Hafiz Yaacob - Universiti Teknologi MARA Perlis Branch", "Lee Sin Ang - Universiti Teknologi MARA Perlis Branch", "Mohd Suffian Yusoff - Universiti Sains Malaysia Engineering Campus", "Jamil Mohamed Sapari - Universiti Teknologi MARA Negeri Sembilan Branch" ]
25 June 2024
Kinetic, Isotherm, and Thermodynamic Studies of the Removal of Dissolved Chemical Oxygen Demand (dCOD) from Landfill Leachate by Iron Oxide Nanoparticles (IONPs)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0050-4331886
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0050-4331886
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0050
https://doi.org/10.55373/mjchem.v26i3.476
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Synthesis, Characterization and Antimicrobial Studies of Metal Complexes Derived from Gentamicin Sulfate
null
[ "Fiona N. F. How - International Islamic University Malaysia", "Mohammad Faiz Hizzuan Bin Hanapi - International Islamic University Malaysia", "Dayang Fatin Nadhirah Binti Abang Sapan - International Islamic University Malaysia" ]
29 June 2021
Synthesis, Characterization and Antimicrobial Studies of Metal Complexes Derived from Gentamicin Sulfate
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00303
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00303
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Synthesis, Structural Elucidation and Mesophase Behaviour of Hexasubstituted Cyclotriphosphazene Molecules with Amide Linking Unit
null
[ "Zuhair Jamain - Universiti Malaysia Sabah", "Melati Khairuddean - Universiti Sains Malaysia", "Nur Kamarina Kamaruddin - Universiti Sains Malaysia", "Yeoh Zhi Rui - Universiti Sains Malaysia" ]
29 June 2021
Synthesis, Structural Elucidation and Mesophase Behaviour of Hexasubstituted Cyclotriphosphazene Molecules with Amide Linking Unit
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00302
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00302
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
Piper betle; essential oil; antibacterial; ADME; drug-likeness
Vol 26 No 3 (2024): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0050
Chemical Composition, Antibacterial Activity, and ADME Studies of Leaf Essential Oil of Piper betle
This study aims to determine the chemical composition and antibacterial activity of the essential oil of Piper betle leaf and predict the physicochemical and ADME (absorption, distribution, metabolism and excretion) properties of the major compounds found from the oil. The essential oil was extracted by hydrodistillation technique and analysed using gas chromatography-flame ionisation detector (GC-FID) and gas chromatography-mass spectrometry (GC-MS). The antibacterial activity was screened using the disc diffusion method, while the physicochemical and ADME properties were predicted using the SwissADME web tool. Thirty-eight compounds were successfully identified, representing 94.1% of the total oil. Eugenol (18.9%), germacrene D (11.6%), chavibetol acetate (9.3%), β-caryophyllene (7.4%), and bicyclogermacrene (7.3%) were identified as the main compounds in the essential oil. The P. betle oil gave the diameter of inhibition zones against all tested bacteria in the range between 7.00 and 12.67 mm, with the largest inhibition zone observed for B. cereus (12.67 mm). The ADME studies revealed that eugenol and chavibetol acetate exhibited good drug-likeness properties by passing Lipinski’s rule of five. These findings lead us to consider both compounds as a potential scaffold for enhancing antibacterial activity.
[ "Fatin Syahira Ahmad - Universiti Teknologi MARA", "Siti Mazleena Mohamed - Universiti Teknologi MARA", "Nor Akmalazura Jani - Universiti Teknologi MARA", "Mailina Jamil - Forest Research Institute Malaysia (FRIM)" ]
25 June 2024
Chemical Composition, Antibacterial Activity, and ADME Studies of Leaf Essential Oil of Piper betle
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0050-ac07220
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0050-ac07220
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0050
https://doi.org/10.55373/mjchem.v26i3.456
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Structural Characterization and Visible Light-Induced Photoelectrochemical Performance of Fe-Sensitized TiO2 Nanotube Arrays Prepared via Electrodeposition
null
[ "Lim Ying Chin - Universiti Teknologi MARA", "Najaa Mustaffa - Universiti Teknologi MARA", "Asmaa Kadim Ayal - University of Baghdad", "Devagi Kanakaraju - Universiti Malaysia Sarawak", "Lim Ying Pei - Universiti Teknologi MARA" ]
29 June 2021
Structural Characterization and Visible Light-Induced Photoelectrochemical Performance of Fe-Sensitized TiO2 Nanotube Arrays Prepared via Electrodeposition
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00298
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00298
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Antibacterial and Antiplasmodial Properties of Chemical Compounds Isolated from Bark of Phyllanthus acidus (L.) Skeels
null
[ "Qian-Yu Lim - Tunku Abdul Rahman University College", "Siow-Ping Tan - Tunku Abdul Rahman University College", "Hui-Yin Tan - Tunku Abdul Rahman University College", "Wee-Kent Liew - University of Malaya", "Yee-Ling Lau - University of Malaya", "Mohd Azlan Nafiah - Universiti Pendidikan Sultan Idris" ]
29 June 2021
Antibacterial and Antiplasmodial Properties of Chemical Compounds Isolated from Bark of Phyllanthus acidus (L.) Skeels
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00297
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00297
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Discrimination of Herbal Products from Zingiberaceae Family Using Electric Nose Combined with Chemometric Techniques
null
[ "A. N. Pauzi - Universiti Tun Hussein Onn Malaysia", "N. Muhammad - Universiti Tun Hussein Onn Malaysia", "N. Abdullah - Universiti Tun Hussein Onn Malaysia", "N. Kamal - Universiti Kebangsaan Malaysia" ]
29 June 2021
Discrimination of Herbal Products from Zingiberaceae Family Using Electric Nose Combined with Chemometric Techniques
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00301
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00301
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Chemical Composition of Agarwood Essential Oil (Aquilaria malaccensis) Upon Exposure Towards Heat Condition
null
[ "Hezelin Elayana Shaian - Universiti Malaysia Pahang", "Che Mohd Aizal - Universiti Malaysia Pahang", "Saiful Nizam Tajuddin - Universiti Malaysia Pahang" ]
29 June 2021
Chemical Composition of Agarwood Essential Oil (Aquilaria malaccensis) Upon Exposure Towards Heat Condition
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00300
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00300
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
A Preliminary Study of Potential Aquatic Macrophytes in Phytoremediation of Lead in The Muar River
It has been observed that phytoremediation of wastewater using the aquatic macrophytes system is a predominant method that is economical to construct, requires little maintenance, and can increase water quality. This research aims to quantify the potential of water hyacinth (WH) and water lettuce (WL) as phytoremediation agents to accumulate lead (Pb) and to determine the water quality of Muar River. Atomic Absorption Spectroscopy (AAS) was used to demonstrate Pb absorption from the water sample by plant tissue, which are the roots. WH and WL uptake rates of Pb were measured in a short-term experiment. The initial concentration of Pb in the Muar River was 0.514 mg/L. The maximum absorption efficiency of Pb was observed with WL compared to WH after ten days. Pb concentration in the Muar River remediated with WH and WL decreased to 0.104 mg/L and 0.063 mg/L, respectively. The bioconcentration factor (BCF) of WL and WH was greater than 1, indicating that both plants were good accumulators. The water was characterized by six parameters, which were Ammonia Nitrogen (AN), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Dissolved Oxygen (DO), pH, and Total Suspended Solid (TSS). Our study demonstrated that water quality was significantly improved after phytoremediation by both plants. In conclusion, the study shows that water hyacinth and water lettuce can be used effectively as a phytoremediator agent to absorb Pb i.e. as a potential bio-accumulator.
[ "Nurul’ Ain Jamion - Universiti Teknologi MARA", "Faiz Idden Shah Ismail - Universiti Teknologi MARA", "Nur Salwani Ab Wahid - Universiti Teknologi MARA" ]
29 June 2021
A Preliminary Study of Potential Aquatic Macrophytes in Phytoremediation of Lead in The Muar River
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00296
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00296
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Plant Extracts: A Promising Source for the Green Synthesis of Copper Nanoparticles Towards Agriculture and Environmental Applications
null
[ "Wan Hazman Danial - International Islamic University Malaysia", "Nurul Iman Aminudin - International Islamic University Malaysia", "Hanna Khaleeda Mohd Shukri - International Islamic University Malaysia", "Nur Aqilah Sarip - International Islamic University Malaysia" ]
29 June 2021
Plant Extracts: A Promising Source for the Green Synthesis of Copper Nanoparticles Towards Agriculture and Environmental Applications
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00295
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00295
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Combining Chemometrics, Sensory Analysis and Chromatographic Fingerprint of Volatile, and Phenolic Compositions for Systematic Classification of Pineapple (Ananas comosus L.)
null
[ "Syaidatul Faraha Zainuddin - Universiti Teknologi MARA", "Rozita Osman - Universiti Teknologi MARA", "Hafizan Juahir - Universiti Sultan Zainal Abidin", "Siti Raihan Zakaria - Universiti Teknologi MARA Pahang" ]
29 June 2021
Combining Chemometrics, Sensory Analysis and Chromatographic Fingerprint of Volatile, and Phenolic Compositions for Systematic Classification of Pineapple (Ananas comosus L.)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00299
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00299
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Facile One-Step Preparation and Characterization of Graphene Quantum Dots Suspension via Electrochemical Exfoliation
null
[ "Wan Hazman Danial - International Islamic University Malaysia", "Bashariah Farouzy - International Islamic University Malaysia", "Mundzir Abdullah - Universiti Sains Malaysia", "Zaiton Abdul Majid - Universiti Teknologi Malaysia" ]
29 June 2021
Facile One-Step Preparation and Characterization of Graphene Quantum Dots Suspension via Electrochemical Exfoliation
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00294
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00294
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Schiff Bases and Their La(III) Complexes: Conventional and Microwave-Assisted Synthesis, Physicochemical and Spectroscopic Analysis
null
[ "Nur Husnina Nasaruddin - Universiti Teknologi MARA", "Shahrul Nizam Ahmad - Universiti Teknologi MARA", "Hadariah Bahron - Universiti Teknologi MARA", "Nor Mas Mira Abd Rahman - University of Malaya", "Nor Saadah Mohd Yusof - University of Malaya" ]
29 June 2021
Schiff Bases and Their La(III) Complexes: Conventional and Microwave-Assisted Synthesis, Physicochemical and Spectroscopic Analysis
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00289
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00289
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
The Application of K/Al2O3 with Ethanolic 2-Metylimidazole for the Extraction of Naphthenic Acid from Crude Oil
null
[ "Noraini Safar Che Harun - Universiti Teknologi MARA", "Norshahidatul Akmar Mohd Shohaimi - Universiti Teknologi MARA Pahang", "Ahmad Zamani Ab Halim - Universiti Malaysia Pahang, Kuantan, Pahang", "Nor Hakimin Abdullah - Universiti Malaysia Kelantan", "Nurasmat Mohd Shukri - Universiti Sains Malaysia" ]
29 June 2021
The Application of K/Al2O3 with Ethanolic 2-Metylimidazole for the Extraction of Naphthenic Acid from Crude Oil
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00288
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00288
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Transesterification of Waste Cooking Oil Utilizing Heterogeneous K2CO3/Al2O3 and KOH/Al2O3 Catalysts
null
[ "Muhammad Amirrul Hakim Lokman Nolhakim - Universiti Teknologi MARA Cawangan Pahang", "Norshahidatul Akmar Mohd Shohaimi - Universiti Teknologi MARA Cawangan Pahang", "Mohd Lokman Ibrahim - Universiti Teknologi MARA", "Wan Nur Aini Wan Mokhtar - Universiti Kebangsaan Malaysia", "Ahmad Zamani Ab Halim - Universiti Malaysia Pahang, Kuantan, Pahang" ]
29 June 2021
Transesterification of Waste Cooking Oil Utilizing Heterogeneous K2CO3/Al2O3 and KOH/Al2O3 Catalysts
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00287
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00287
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Physiochemical Analysis of Cocoa Powder-Like from Roasted Seeds of Fermented Nephelium lappaceum L. (Rambutan) and Nephelium mutabile Bl. (Pulasan) Fruits
null
[ "Hazrulrizawati Abd Hamid - Universiti Malaysia Pahang", "Izzah Hayati Yahya - Universiti Malaysia Pahang", "Aizi Nor Mazila Ramli - Universiti Malaysia Pahang" ]
29 June 2021
Physiochemical Analysis of Cocoa Powder-Like from Roasted Seeds of Fermented Nephelium lappaceum L. (Rambutan) and Nephelium mutabile Bl. (Pulasan) Fruits
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00293
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00293
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Isolation and Cloning of Sesquiterpene Synthases (AmGS3 and AmGS4) and Chalcone Synthase (AmCHS) from Aquilaria malaccensis Responsible for Agarwood Formation
null
[ "Aimi Wahidah Aminan - Universiti Malaysia Pahang", "Siti Zulaiha Zailani - Universiti Malaysia Pahang", "Saiful Nizam Tajuddin - Universiti Malaysia Pahang", "Aizi Nor Mazila Ramli - Universiti Malaysia Pahang" ]
29 June 2021
Isolation and Cloning of Sesquiterpene Synthases (AmGS3 and AmGS4) and Chalcone Synthase (AmCHS) from Aquilaria malaccensis Responsible for Agarwood Formation
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00291
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00291
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Molecular Docking Analysis of Designed Ligands on VP40 of Ebola Virus
null
[ "Nur Fadhilah Rahim - International Islamic University Malaysia", "Mohamad Ariff Mohamad Yussoff - International Islamic University Malaysia", "Khairul Bariyyah binti Abd Halim - International Islamic University Malaysia", "Azzmer Azzar Abdul Hamid - International Islamic University Malaysia", "Shafida Abd Hamid - International Islamic University Malaysia" ]
29 June 2021
Molecular Docking Analysis of Designed Ligands on VP40 of Ebola Virus
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00286
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00286
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Transformation of Kaolin to Kalsilite: Effect of KOH Concentration and Reaction Temperature
null
[ "Eddy F. Yusslee - Universiti Malaysia Sabah", "Nur Hazwani Dahon - Universiti Malaysia Sabah", "Mohd Azrul Abd Rajak - Universiti Malaysia Sabah", "Sazmal E. Arshad - Universiti Malaysia Sabah" ]
29 June 2021
Transformation of Kaolin to Kalsilite: Effect of KOH Concentration and Reaction Temperature
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00292
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00292
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Isolation of a Morphinan Alkaloid and a Methoxybenzoic Acid with The Investigation on The Antibacterial Effect of Alphonsea cylindrica King Leaves
null
[ "Kin-Hau Cho - Tunku Abdul Rahman University College", "Hui-Yin Tan - Tunku Abdul Rahman University College", "Mohd Azlan Nafiah - Sultan Idris Education University", "Siow-Ping Tan - Tunku Abdul Rahman University College" ]
29 June 2021
Isolation of a Morphinan Alkaloid and a Methoxybenzoic Acid with The Investigation on The Antibacterial Effect of Alphonsea cylindrica King Leaves
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00290
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00290
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
DNA-Assisted Stabilization of Graphene Sheets and Its Application as Supercapacitors Electrode
null
[ "Yasin M. Y. Albarqouni - Universiti Malaysia Pahang", "Gomaa A. M. Ali - Al‒Azhar University", "Soon Poh Lee - Universiti Malaysia Pahang", "Rahim Mohd Hairul - Universiti Malaysia Pahang", "Kwok Feng Chong - Universiti Malaysia Pahang" ]
29 June 2021
DNA-Assisted Stabilization of Graphene Sheets and Its Application as Supercapacitors Electrode
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00285
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00285
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Synthesis and Characterization of Polyaniline/Chitin (Squid Pens) for the Removal of Chromium (VI) from Aqueous Solution
null
[ "Siti Nor Atika Baharin - Universiti Teknologi MARA", "Hafiz Istamam - Universiti Teknologi MARA", "Nur Farahin Suhaimi - Universiti Teknologi MARA", "Nurul’ Ain Jamion - Universiti Teknologi MARA", "Muggundha Raaov - Universiti Teknologi MARA", "Kavirajaa Pandian Sambasevam - Universiti Teknologi MARA" ]
29 June 2021
Synthesis and Characterization of Polyaniline/Chitin (Squid Pens) for the Removal of Chromium (VI) from Aqueous Solution
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00282
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00282
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
A Review on Synthesis of Plant-Mediated Metal Nanoparticles for Fabric Coating
null
[ "Hartina Mohd Yusop - Universiti Malaysia Pahang", "Wan Norfazilah Wan Ismail - Universiti Malaysia Pahang" ]
29 June 2021
A Review on Synthesis of Plant-Mediated Metal Nanoparticles for Fabric Coating
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00284
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00284
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
In Vitro Evaluation of Crosslinked Polyvinyl Alcohol/Chitosan – Gentamicin Sulfate Electrospun Nanofibers
null
[ "Nazirah Hamdan - International Islamic University Malaysia Kuantan Campus", "Deny Susanti Darnis - International Islamic University Malaysia Kuantan Campus", "Wan Khartini Wan Abdul Khodir - International Islamic University Malaysia Kuantan Campus" ]
29 June 2021
In Vitro Evaluation of Crosslinked Polyvinyl Alcohol/Chitosan – Gentamicin Sulfate Electrospun Nanofibers
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00279
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00279
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Synthesis and Characterization of Amino Acid-Derived Hydantoins
null
[ "Ee-Zhen Chin - Tunku Abdul Rahman University College", "Siow-Ping Tan - Tunku Abdul Rahman University College", "Sook-Yee Liew - University of Malaya", "Thomas Kurz - Heinrich-Heine Universität Düsseldorf" ]
29 June 2021
Synthesis and Characterization of Amino Acid-Derived Hydantoins
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00281
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00281
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Development of a HPLC Method for Quantification of Amentoflavone in Leaf Extracts of Three Calophyllum Species
null
[ "Nurul Iman Aminudin - International Islamic University Malaysia", "Nadia Aziba Norazhar - International Islamic University Malaysia", "Farediah Ahmad - Universiti Teknologi Malaysia" ]
29 June 2021
Development of a HPLC Method for Quantification of Amentoflavone in Leaf Extracts of Three Calophyllum Species
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00283
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00283
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
null
Vol 23 No 2 (2021): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
Calcium Oxide Derived from Egg Shells: A Low Cost Catalyst for Biodiesel Production
null
[ "Noraini Hamzah - Universiti Teknologi MARA", "Izyan Yusof - Universiti Teknologi MARA", "Wan Zurina Samad - International Islamic University Malaysia", "Hairul Amani Abdul Hamid - Universiti Teknologi MARA", "Nazrizawati Ahmad Tajuddin - Universiti Teknologi MARA", "Mohd Lokman Ibrahim - Universiti Teknologi MARA" ]
29 June 2021
Calcium Oxide Derived from Egg Shells: A Low Cost Catalyst for Biodiesel Production
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0031-A00280
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0031-A00280
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0031
null
Amide; dichromate; propyl; spacer; titration
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
Anion Titration Studies of Flexible Amide Ligands Bearing Propyl Spacer as Potential Anion Receptors for Dichromate
Amide compounds are appealing organic ligands that can be further customized to produce a wide range of coordination polymers or metal-organic frameworks. Because of their crucial significance as anion receptors, they have also been a target used in the biological and chemical industries as potential materials for separation or chemical sensor. In this study, the addition of a propyl spacer to an amide ligand was utilized to increase flexibility, size of cavity, and potentiality of the molecules as anion receptors. Therefore, in this study, two flexible amide containing propyl spacer, namely bis[N,N’-6-(3-pyridylmethylamido)pyridyl-2-carboxyamido]propane (L1), and bis[N,N’-6-(4-pyridylmethylamido)pyridyl-2-carboxyamido]propane (L2), which were obtained from the reaction between N-6-[(3-pyridylmethylamino)carbonyl]-pyridine-2-carboxylic acid methyl ester with 1,3-propylenediamine, respectively, were utilized. Combination of typical analytical and spectroscopy techniques such as Nuclear Magnetic Resonance (NMR), Fourier Transform Infrared (FTIR), and Ultraviolet-Visible (UV-Vis) were used to characterize these two isomers. Initial investigation on the potential of these compounds to act as anion receptors was carried out using anion titration techniques. The results obtained from this method showed that L1 and L2 have promising potential to interact with dichromate anions compared to nitrate and chloride.
[ "Nur Shuhaila Haryani Haris - Universiti Malaysia Terengganu", "Nur Amani Najwa Shamsulazri - Universiti Malaysia Terengganu", "Nafisah Mansor - Universiti Malaysia Terengganu", "Hafiza Mohamed Zuki - Universiti Malaysia Terengganu", "Maisara Abdul Kadir - Universiti Malaysia Terengganu" ]
30 June 2022
Anion Titration Studies of Flexible Amide Ligands Bearing Propyl Spacer as Potential Anion Receptors for Dichromate
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-f014287
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-f014287
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.302
Anthraquinone is a natural dye with many applications. The present findings provide valuable information on the photophysical properties of natural anthraquinone, which are previously inaccessible due to unavailability/difficulty in obtaining pure samples. The absorption/emission bands were found to have shifted to the visible region, as a result of hyper-conjugation phenomenon due to the formation of additional quasi aromatic rings between the strategically located substitution groups with the anthraquinone core structure. The formation of the quasi aromatic rings was supported by the observation in the NMR spectra. The results suggested the role of the substitution group in controlling absorption/emission band transitions and selectivity, highlighting anthraquinone potential in the dye and sensor applications.
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Characterization and Photophysical Properties of Natural Anthraquinone Dyes in Borneo Traditional Pua Kumbu Textile
null
[ "Nabila Elyana Adnan - Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia", "Nur Atiqah Mohd Nasuha - Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia", "Hairul Anuar Tajuddin - Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia", "Zanariah Abdullah - Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia", "Yeun-Mun Choo - Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia" ]
29 September 2020
Characterization and Photophysical Properties of Natural Anthraquinone Dyes in Borneo Traditional Pua Kumbu Textile
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00255
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00255
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
New and novel prolinamide organocatalysts were synthesized from L
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Efficient Novel Prolinamide-Based Organocatalysts for Aldol Reactions in Aqueous Media
null
[ "Noraishah Abdullah - Organic Synthesis Laboratory, Institute of Science, Universiti Teknologi MARA, Puncak Alam Campus, 43200 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia", "Zurina Shaameri - Organic Synthesis Laboratory, Institute of Science, Universiti Teknologi MARA, Puncak Alam Campus, 43200 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia", "Ahmad Sazali Hamzah - Organic Synthesis Laboratory, Institute of Science, Universiti Teknologi MARA, Puncak Alam Campus, 43200 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia", "Mohd Fazli Mohammat - Organic Synthesis Laboratory, Institute of Science, Universiti Teknologi MARA, Puncak Alam Campus, 43200 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia" ]
29 September 2020
Efficient Novel Prolinamide-Based Organocatalysts for Aldol Reactions in Aqueous Media
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00254
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00254
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Symmetrical Schiff base ligand L1:  6,6'-(1E,1'E)-(1,3-phenylenebis(azan-1-yl-1-ylidene))-bis(methan-1-yl-1-ylidene)bis(2-methoxyphenol) was synthesized from a condensation reaction of
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Synthesis of Tetranuclear Zinc(II) Azomethine Complex: A Comparative Appraisal Between Conventional and Microwave-Assisted Methods
null
[ "Siti Solihah Khaidir - Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia", "Hadariah Bahron - Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia", "Amalina Mohd Tajuddin - Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia", "Cepi Kurniawan - Chemistry Department, Faculty of Mathematics and Natural Science, Universitas Negeri Semarang, Indonesia" ]
29 September 2020
Synthesis of Tetranuclear Zinc(II) Azomethine Complex: A Comparative Appraisal Between Conventional and Microwave-Assisted Methods
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00253
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00253
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
The synthesis of a new derivative of pentalongin
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Synthesis of a New Pentalongin Derivative and its Saturated Analogue
null
[ "Najmah P.S Hassan - Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Malaysia", "Mohd Tajudin Mohd Ali - Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Malaysia", "Fazni Susila Abd Ghani - Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Malaysia" ]
29 September 2020
Synthesis of a New Pentalongin Derivative and its Saturated Analogue
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00250
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00250
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Three series of salphen derivatives were synthesised and underwent complexation with Cd(II) ion using microwave irradiation. The synthesised compounds were characterised using FT-IR, NMR, elemental analysis, and X-ray crystallography. The FT-IR and
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Green Synthesis of Salicylaldehyde Derivative Schiff Base Metal Complexes Using Microwave Irradiation: Characterisation & Antimicrobial Studies
null
[ "Karimah Kassim - Institute of Science, Universiti Teknologi MARA, UiTM Shah Alam, Selangor, Malaysia", "Muhamad Azwan Hamali - Faculty of Applied Sciences, Universiti Teknologi MARA, UiTM Shah Alam, Selangor, Malaysia", "Noor Hana Hussain - Institute of Science, Universiti Teknologi MARA, UiTM Shah Alam, Selangor, Malaysia" ]
29 September 2020
Green Synthesis of Salicylaldehyde Derivative Schiff Base Metal Complexes Using Microwave Irradiation: Characterisation & Antimicrobial Studies
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00249
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00249
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Eighteen biscoumarin analogs
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Biscoumarin Analogs: Synthesis, α-Glucosidase Inhibitory Potential and Molecular Docking Study
null
[ "Norizan Ahmat - Faculty of Applied Sciences, UiTM Shah Alam, 40450 Shah Alam, Selangor D.E. Malaysia", "Nik Khairunissa Nik Abdullah Zawawi - Faculty of Applied Sciences, UiTM Shah Alam, 40450 Shah Alam, Selangor D.E. Malaysia", "Muhammad Taha Atta-ur-Rahman - Institute for Natural Product Discovery, Universiti Teknologi MARA (UiTM), Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor D. E. Malaysia", "Abdul Wadood - Department of Chemistry, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan", "Fazal Rahim - Department of Chemistry, Hazara University Mansehra, 21300 Khyber Pakhtunkhwa, Pakistan", "Hayat Ullah - Department of Chemistry, Hazara University Mansehra, 21300 Khyber Pakhtunkhwa, Pakistan" ]
29 September 2020
Biscoumarin Analogs: Synthesis, α-Glucosidase Inhibitory Potential and Molecular Docking Study
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00252
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00252
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Eugenol is the major compound of clove and has demonstrated various pharmacological activities. In this study, nine eugenol derivatives (
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Anti-Amoebic Activity of Eugenol Derivatives against Acanthamoeba castellanii
null
[ "Khairunisa Mohd Zamli - Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia", "Asnuzilawati Asari - Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia", "Fatimah Hashim - Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia", "Hanis Mohd Yusoff - Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia", "Habsah Mohamad - Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia", "Fauziah Abdullah - Natural Product Division Forest Research Institute of Malaysia, 52109 Kepong, Selangor, Malaysia" ]
29 September 2020
Anti-Amoebic Activity of Eugenol Derivatives against Acanthamoeba castellanii
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00251
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00251
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Eleven pyrrolidine-based iminosugar derivatives have been synthesized and evaluated for inhibition of a-glucosidase and molecular docking. The compounds studied were hydrazinyl, hydroxyamino and hydroxypyrrolidine derivatives. The most promising iminosugar derivative was 3-hydrazinyl-4-hydroxymethyl-1-methyl-5-(4-methoxyphneyl) pyrrolidine (C
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Synthesis of Some Novel Pyrrolidine-Based Iminosugars, Molecular Docking Study and Evaluation of Their Antidiabetic Properties
null
[ "A. Wibowo - Faculty of Applied Science, Universiti Teknologi MARA (UiTM) Pahang, Jengka Campus, 26400 Bandar Tun Abdul Razak Jengka, Pahang, Malaysia", "Z. Shaameri - Organic Synthesis Laboratory, Institute of Science, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia", "M. F. Mohammat - Organic Synthesis Laboratory, Institute of Science, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia", "F. N. A. A Rashid - Organic Synthesis Laboratory, Institute of Science, Universiti Teknologi MARA (UiTM), 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia", "N. S. Rezali - Chemical Sciences Programme, School of Distance Education, Univesiti Sains Malaysia (USM), 11800 Minden, Penang, Malaysia F. Kamarulzaman" ]
29 September 2020
Synthesis of Some Novel Pyrrolidine-Based Iminosugars, Molecular Docking Study and Evaluation of Their Antidiabetic Properties
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00248
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00248
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Phytochemical Screening, Total Phenolic Content and Antioxidant Activity of Leaf Extract of Muntingia calabura
null
[ "Noor Hidayah Pungot - Faculty of Applied Sciences, School of Chemistry and Enviroment, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia", "Nur Syafiqah Atikah Nazaharuddin - Faculty of Applied Sciences, School of Chemistry and Enviroment, Universiti Teknologi MARA(UiTM) Cawangan Negeri Sembilan, Kampus Kuala Pilah, Pekan Parit Tinggi, 72000 Kuala Pilah, Negeri Sembilan, Malaysia" ]
29 September 2020
Phytochemical Screening, Total Phenolic Content and Antioxidant Activity of Leaf Extract of Muntingia calabura
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00247
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00247
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
A series of four benzaldehyde derivatives have been synthesized and underwent complexation with Ni(II) and Pd(II) ions using a microwave-assisted method. All compounds were characterized structurally using CHNS, FT-IR, and
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Synthesis, Characterization and Antibacterial Studies of Nickel(II) and Palladium(II) Complexes of Thiosemicarbazone
null
[ "Fazhrul Haqimee Zaidon - Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia", "Karimah Kassim - Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia", "Anis Low Muhammad Low - Atta-ur-Rahman Institute for Natural Product Discovery (AuRins), Universiti Teknologi MARA, Selangor Branches, Puncak Alam Campus, 42300 Selangor, Malaysia", "Nor Zakiah Nor Hashim - Centre of Foundation Studies, Universiti Teknologi MARA, Selangor Branches, Dengkil Campus, 43800 Selangor, Malaysia" ]
29 September 2020
Synthesis, Characterization and Antibacterial Studies of Nickel(II) and Palladium(II) Complexes of Thiosemicarbazone
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00246
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00246
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Cinnamic acids are a group of aromatic carboxylic acids found naturally in the plant kingdom. This group of molecules can be found in coffee beans, tea, cocoa, apples, citruses, and potatoes. Cinnamic acids possess outstanding biological and pharmacological activities. In this study, a series of known and new cinnamic acid ester derivatives (
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Synthesis, Characterization and Antibacterial Study of Cinnamic Acid Derivatives
null
[ "Farah Amirah Azmi - Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia", "Asnuzilawati Asari - Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia", "Maisara Abdul Kadir - Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia", "Yosie Andriani - Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia", "Fauziah Abdullah - Phytochemistry Programme Natural Product Division, Forest Research Institute of Malaysia, 52109 Kepong, Selangor, Malaysia", "Habsah Mohamad - Institute of Marine Biotechnology, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia" ]
29 September 2020
Synthesis, Characterization and Antibacterial Study of Cinnamic Acid Derivatives
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00245
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00245
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Two series of azomethine compounds derived from 2-hydroxy-3-methoxybenzaldehyde (
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Synthesis and Anticorrosion Studies of Azomethine Derived from Aniline
null
[ "Karimah Kassim - Institute of Science, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia", "Nor Zakiah Nor Hashim - Centre of Foundation Studies, Universiti Teknologi MARA, 43800 Dengkil, Selangor, Malaysia", "Muhammad Ashraf Mohd Kahar - Faculty of Applied Science, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia" ]
29 September 2020
Synthesis and Anticorrosion Studies of Azomethine Derived from Aniline
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00244
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00244
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Mild steel plays an important role in many construction industries due to its low cost and outstanding mechanical properties. However, the utilization of strong acid in pickling, construction operation, and oil refining processes adds to a serious corrosion issue on mild steel. 4-nitrobenzohydroxamic acid (4NBHA) and 4-chlorobenzohydroxamic acid (4CBHA) ligands were synthesized to scrutinize the corrosion resistance activity toward mild steel in an acidic medium. Both ligands were characterized by using melting point and Fourier Transform Infrared (FTIR), ultraviolet-visible (UV-Vis) and Nuclear Magnetic Resonance (NMR) spectroscopies. The corrosion resistance of mild steel was studied with different inhibitor concentrations (1 mM, 2 mM, 3 mM, 4 mM, and 5 mM). Results of weight loss method showed that the higher the inhibitor concentration, the lower the corrosion rate.  4CBHA showed a superior corrosion resistance (%E: 80.76) due to the presence of withdrawing groups, which were the chloro group that was less reactive as compared to the nitro- group in 4NBHA (%E: 77.60). Langmuir isotherm calculation showed that the ligands were adsorbed on the mild steel surface by forming a monolayer and there were no interactions between the adsorbed inhibitors. The values of standard free energy (ΔG) were -29.36 kJ mol
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Synthesis, Characterization and Corrosion Inhibition Screening of Benzohydroxamic Acid Derivatives in H2SO4: A Langmuir Isotherm
null
[ "Fatin Nurzarifah Razali - School of Chemistry and Environment, Faculty of Applied Sciences Universiti Technologi Mara, Negeri Sembilan Branch, Kuala Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "Nurul Ain Nadirah Jamaluddin - School of Chemistry and Environment, Faculty of Applied Sciences Universiti Technologi Mara, Negeri Sembilan Branch, Kuala Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "Nur Nadia Dzulkifli - School of Chemistry and Environment, Faculty of Applied Sciences Universiti Technologi Mara, Negeri Sembilan Branch, Kuala Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia" ]
29 September 2020
Synthesis, Characterization and Corrosion Inhibition Screening of Benzohydroxamic Acid Derivatives in H2SO4: A Langmuir Isotherm
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00243
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00243
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Salicylic acid (SA) is a type of organic ultraviolet absorber that can cause health issues when used at high concentrations. Zinc-layered hydroxide (ZLH) with the chemical formula of M
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Characterization of Interleaved Zinc-Layered Hydroxide-Salicylic with Sustained Release Property: A New Promising Ultraviolet Absorber
null
[ "Nurain Adam - Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor Darul Ehsan, Malaysia", "Sheikh Ahmad Izaddin Sheikh Mohd. Ghazali - Faculty of Applied Sciences, Universiti Teknologi MARA Negeri Sembilan, Kampus Kuala Pilah, Pekan Parit Tinggi, 72000, Kuala Pilah, Negeri Sembilan, Malaysia", "Nur Nadia Dzulkifli - Faculty of Applied Sciences, Universiti Teknologi MARA Negeri Sembilan, Kampus Kuala Pilah, Pekan Parit Tinggi, 72000, Kuala Pilah, Negeri Sembilan, Malaysia", "Cik Rohaida Che Hak - Industrial Technology Division, Malaysian Nuclear Agency, Bangi, 43000, Kajang, Malaysia" ]
29 September 2020
Characterization of Interleaved Zinc-Layered Hydroxide-Salicylic with Sustained Release Property: A New Promising Ultraviolet Absorber
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00242
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00242
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Schiff base ligand S-methyl 2-(2-oxoindolin-3-ylidene)hydrazinecarbodithioate, SMISA (
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Distorted Octahedral S-Methyl 2-(2-Oxoindolin-3-Ylidene) Hydrazinecarbodithioate (SMISA) Tridentate Schiff Base Complex of Co(II): Synthesis, Characterization and Structural Studies
null
[ "M. A. F. Abdul Manan - Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia", "M. I. M. Tahir - Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia", "K. A. Crouse - Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia", "F. N. F. How - Department of Chemistry, Kulliyyah of Science, International Islamic University Malaysia (IIUM), Jalan Sultan Ahmad Shah, 25200 Bandar Indera Mahkota, Kuantan Pahang, Malaysia" ]
29 September 2020
Distorted Octahedral S-Methyl 2-(2-Oxoindolin-3-Ylidene) Hydrazinecarbodithioate (SMISA) Tridentate Schiff Base Complex of Co(II): Synthesis, Characterization and Structural Studies
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00241
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00241
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
Palladium offers various applications in the field of fine chemicals, especially as a catalyst in carbon-carbon coupling reactions. Pd
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
Catalytic Activity Study of Synthesized Palladium(II)-Hydrazone Complexes in the Heck Reaction: Optimization of the Amount of Catalyst Loading and Reaction Time
null
[ "Nur Rahimah Said - School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Kuala Pilah, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "Nurul Nazirah Md Adib - School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Kuala Pilah, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "Roszaida Mohamaad Roszaidi - School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Kuala Pilah, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "Najwa Asilah M Shamsuddin - School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Kuala Pilah, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "Noor Nadia Haziqa Saidul Badri - School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Cawangan Negeri Sembilan, Kampus Kuala Pilah, 72000 Kuala Pilah, Negeri Sembilan, Malaysia" ]
29 September 2020
Catalytic Activity Study of Synthesized Palladium(II)-Hydrazone Complexes in the Heck Reaction: Optimization of the Amount of Catalyst Loading and Reaction Time
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00240
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00240
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
A simple and efficient synthetic methodology has been developed via Krapcho decarboxylation to construct four new
Vol 22 No 3 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
A Facile One-Step Synthesis of New N2, N9-Benzylated Quaternary β-Carbolin-3-ium Bromides via Krapcho Decarboxylation
null
[ "Mazlin Mohideen - Faculty of Pharmacy and Health Sciences, Universiti Kuala Lumpur - Royal College of Medicine Perak", "Nur Azzalia Kamaruzaman - National Poison Centre, Universiti Sains Malaysia (USM), 11800 Minden, Pulau Pinang, Malaysia", "Mohd Nizam Mordi - Centre for Drug Research, Universiti Sains Malaysia (USM), 11800 Minden, Pulau Pinang, Malaysia", "Sharif Mahsufi Mansor - Centre for Drug Research, Universiti Sains Malaysia (USM), 11800 Minden, Pulau Pinang, Malaysia" ]
29 September 2020
A Facile One-Step Synthesis of New N2, N9-Benzylated Quaternary β-Carbolin-3-ium Bromides via Krapcho Decarboxylation
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0028-A00239
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0028-A00239
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0028
null
In this study, glucose oxidase was used as stabilization medium due to its higher efficiency, ability for more accurate control of enzyme reaction, protecting against wasting of enzyme as well as simple and easy use and exchange of enzyme medium after performing some levels of surface modification and developing single–walled carbon nanotubes (SWCNT) on gold plates. For better connecting and stabilizing of the enzyme on the medium, the prepared medium was washed with concentrated sulfuric acid and nitric acid and a large volume of deionized water. For protecting the enzyme from devastating effects of gold and prohibiting it from becoming inactive, the surface was covered with cystamine before stabilization. Regarding the large size of glucose oxidase compared to the surface of the medium, a connective material with amid at one end and pyrine at the other end was used as a transfer agent, and for stabilizing this connection the prepared medium was placed into dimethylformamide (DMF) solution for a couple of hours. Activity of the stabilized enzyme at the wavelength of 460 nm recorded by spectroscope was depicted against time to evaluate its stability at various times. The prepared medium, which had a large amount of glucose oxidase, could be used as an electrode in sensors. Furthermore, glucose oxidase electrochemical sensor is one of the best methods for detecting low amounts of glucose, and applying gold colloidal nanoparticles as a supplementary material in the structure of biosensors can be effective for improving its efficiency and optimum performance. In this study, a modified carbon paste electrode biosensor with gold colloidal nanoparticles (A
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Application of Single–Walled Carbon Nanotubes (SWCNT) in the Production of Glucose Biosensors and Improving Their Performance Using Gold Colloidal Nanoparticles and Usage of Polyaniline Nanostructure–Based Biosensors for Detecting Glucose and Cholesterol
null
[ "Alireza Heidari - California South University" ]
29 June 2020
Application of Single–Walled Carbon Nanotubes (SWCNT) in the Production of Glucose Biosensors and Improving Their Performance Using Gold Colloidal Nanoparticles and Usage of Polyaniline Nanostructure–Based Biosensors for Detecting Glucose and Cholesterol
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00238
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00238
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
The adsorption of methylene blue (MB) by chitin-ionic liquid beads was carried out with three different types of ionic liquids (ILs); 1‒butyl‒3‒methyl imidazolium acetate (BMIM Ac), 1‒butyl‒3‒methyl imidazolium chloride (BMIM Cl), and 1‒allyl‒3‒methyl imidazolium bromide (AMIM Br). These three ILs were used to investigate the compatibility with chitin in forming adsorbates for MB adsorption. Batch adsorption experiments were conducted to investigate the optimum parameters such as pH, MB initial concentrations, adsorbent dosage, and contact time for adsorption of MB. The kinetic study revealed that pseudo-second order was the appropriate kinetic model for all the synthesized chitin-ILs, whereas Langmuir isotherm gave the best isotherm model for describing the adsorption mechanism of the chitin-ILs towards MB. The calculated q
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Synthesis of Chitin-Ionic Liquid Beads as Potential Adsorbents for Methylene Blue
null
[ "Nor Shahirah Abdul Hamid - Universiti Sains Malaysia", "Faizah Naseeruteen - Universiti Sains Malaysia", "Wan Saime Wan Ngah - Universiti Sains Malaysia", "Noor Fadilah Yusof - Universiti Malaysia Terengganu", "Faizatul Shimal Mehamod - Universiti Malaysia Terengganu", "Faiz Bukhari Mohd Suah - Universiti Sains Malaysia" ]
29 June 2020
Synthesis of Chitin-Ionic Liquid Beads as Potential Adsorbents for Methylene Blue
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00236
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00236
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
Two organometallic complexes, catechol-antimony and pyrogallo-antimony were theoretically studied by means of density functional theory (DFT) calculations. The concept of detection limit in electroanalysis was put in evidence by quantum chemical calculations onto antimony trace analysis in aqueous solution by using pyrogallol (1, 2, 3-trihydroxybenzene) and catechol (1,2-dihydroxybenzene) as ligands. Based on two previously published works, the study was carried out experimentally by polarography technique where the working electrode was a dropping mercury electrode. The DFT study, carried out at the 6-31G
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
The Study of the Correlation between the Detection Limit and the Energy Stability of Two Antimony Complexes by Means of Conceptual DFT
null
[ "Naceur Benhadria - École supérieure en sciences appliquées", "Boulanouar Messaoudi - École supérieure en sciences appliquées", "Tarik Attar - Université Abou Baker Belkaid" ]
29 June 2020
The Study of the Correlation between the Detection Limit and the Energy Stability of Two Antimony Complexes by Means of Conceptual DFT
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00237
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00237
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
Conventionally, ground magnesium limestone (GML) has been used to immobilize lead (Pb) in soil. However, the use of non-renewable sources and the quarrying of GML may cause environmental damage. In this study, composite biochar (CPB) was prepared by pyrolyzing homogenized mixture of palm kernel shells (PKS) and blood cockle shells (BCS) at various PKS-to-BCS weight ratios, peak pyrolysis temperatures, and heating durations. Characterization of CPB was conducted using x-ray fluorescence (XRF), x-ray diffraction (XRD) spectroscopy, pH meter, and thermogravimetric analyzer (TGA). The pH values of CPB increased with decreasing PKS-to-BCS ratio and increasing peak temperature and heating duration. The pH values were measured on shooting range soil incubated with CPB9 at 1, 3, and 5% w/w. Remediation of CPB resulted an increase of pH value in the shooting range soil. Increasing content of BCS increased the pH of CPB, and decreased the solubility and mobility of soil Pb, thereby enhancing the immobilization effect of Pb in soil. These results indicated that CPB was effective in immobilizing Pb in shooting range soil due to the increasing of soil pH (9.1 to 12.0) after incubation, and reduced the exchangeable fraction (7.56% to 0.01% in CPB-treated soil) and carbonate fraction (0.51% to 0.15% in CPB-treated soil).
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Composite Biochar Derived from Palm Kernel Shells and Blood Cockle Shells for Immobilizing Lead in Shooting Range Soil
null
[ "Nor Aishah Ab Malek - Universiti Teknologi MARA", "Mohd Lokman Ibrahim - Universiti Teknologi MARA", "Soon Kong Yong - Universiti Teknologi MARA" ]
29 June 2020
Composite Biochar Derived from Palm Kernel Shells and Blood Cockle Shells for Immobilizing Lead in Shooting Range Soil
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00235
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00235
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
Metal oxides have been exploited with various desired architecture due to their wide applications. One of the promising advantages of metal oxides such as zinc oxide (ZnO) is it can exhibit in many forms of nanostructures. Green synthesis approach is preferable as it is environmentally friendly and offers easy fabrication. In this study, black tea extract has been used to synthesize zinc oxide nanoparticles (ZnONPs) and further calcined at 500, 700, and 900
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Green Synthesis of Zinc Oxide Nanoparticles Using Black Tea Extract and its Potential as Anode Material in Sodium-Ion Batteries
null
[ "Hanis Mohd Yusoff - Universiti Malaysia Terengganu", "Nurul Hayati Idris - Universiti Malaysia Terengganu", "Nurul Fatin Hipul - Universiti Malaysia Terengganu", "Nor Fazila Mahamad - Yusoff Universiti Malaysia Terengganu", "Nur Zafirah Mohd Izham - Universiti Malaysia Terengganu", "Irshad Ul Haq Bhat - Universiti Malaysia Terengganu" ]
29 June 2020
Green Synthesis of Zinc Oxide Nanoparticles Using Black Tea Extract and its Potential as Anode Material in Sodium-Ion Batteries
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00230
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00230
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
Diamond is known as the hardest material with excellent properties including high thermal conductivity at ambient temperature. The ability of diamond to withstand high temperature allows the synthesis of doped diamond by introducing dopants into its structure. The introduced dopants are boron and nitrogen which act as either p-type or n-type, respectively. The doped diamond can act as a photocatalyst for the purpose of water treatment. In this study, different types of dopants introduced into the diamond lattice contributed to different photocatalytic activities. The characterization of Diamond Thin Film (DTF) was done using Scanning Electron Microscopy (SEM) and laser Raman spectrophotometer. Photocatalytic activities of DTF were investigated by degradation of methylene blue and methyl orange as models for the organic pollutants. The concentration of the organic pollutants degraded was analyzed using UV-Vis Spectrophotometer. As a result, n-type doped diamond showed better photocatalytic activities compared to p-type doped diamond with 725 mg/cm2 of methylene blue degraded over the period of 150 minutes.
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Diamond Thin Film as a Photocatalyst for Photodegradation of Dyes
null
[ "Nas Amirah Abd Mutalib - Universiti Sains Islam Malaysia", "Najiha Hamid - Universiti Sains Islam Malaysia", "M. Zamir Othman - Universiti Sains Islam Malaysia", "Syahida Suhaimi - Universiti Sains Islam Malaysia" ]
29 June 2020
Diamond Thin Film as a Photocatalyst for Photodegradation of Dyes
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00234
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00234
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
This work describes the synthesis of ethanolamine-based dendrons via an improved reduction method using potassium borohydride (KBH
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Synthesis of Polyethanolamine Dendrons Using an Improved Reduction Method
null
[ "Chong Mun Hwa - Universiti Teknologi Malaysia", "Mohd Marsin Sanagi - Universiti Teknologi Malaysia", "Salasiah Endud - Universiti Teknologi Malaysia", "Wan Aini Wan Ibrahim - Universiti Teknologi Malaysia" ]
29 June 2020
Synthesis of Polyethanolamine Dendrons Using an Improved Reduction Method
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00233
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00233
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
Heavy metals in lipsticks is a safety threat to the health of consumers. The analytical information on heavy metals in lipsticks is crucial to increase the awareness of users. This study measured and compared the concentration of lead (Pb), cadmium (Cd), chromium (Cr), and copper (Cu) in authentic and inspired lipsticks. A total of 24 lipsticks (12 authentic and 12 inspired) were digested using wet acid digestion method and the elements were analyzed by using atomic absorption spectroscopy (AAS). Based on the permissible levels in lipstick set by the United States Food and Drug Administration (US FDA), all the heavy metals analyzed were detected in three brands of inspired lipsticks. These results revealed that the inspired lipsticks may not be safe to be used by the public.
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Assessment of Permissible Limits for Heavy Metals in Various Inspired and Authentic Lipsticks
null
[ "Nurasmat Mohd Shukri - Universiti Sains Malaysia", "Nur Afiqah Abdul Bashir - Universiti Sains Malaysia", "Norshahidatul Akmar Mohd Shohaimi - Universiti Teknologi MARA", "Wan Nazwanie Wan Abdullah - Universiti Teknologi MARA", "Nor Hakimin Abdullah - Universiti Malaysia Kelantan", "Ahmad Zamani Ab Halim - Universiti Malaysia Pahang", "Nur Fatien Muhamad Salleh - Universiti Sains Malaysia" ]
29 June 2020
Assessment of Permissible Limits for Heavy Metals in Various Inspired and Authentic Lipsticks
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00232
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00232
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
Two new carbonyl thiourea derivatives, 3-methyl-
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Synthesis, Characterization and Application Studies of 3-Methylbenzoyl Thiourea Derivatives as Organocatalysts
null
[ "Mohd Sukeri Mohd Yusof - Universiti Malaysia Terengganu", "Syarifah Masuriana Tuan Mansor - Universiti Malaysia Terengganu", "Maisara Abdul Kadir - Universiti Malaysia Terengganu", "Siti Kamilah Che Soh - Universiti Malaysia Terengganu" ]
29 June 2020
Synthesis, Characterization and Application Studies of 3-Methylbenzoyl Thiourea Derivatives as Organocatalysts
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00231
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00231
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
Dye pollutants are hazardous compounds, highly toxic, and have low biodegradability, thus remain a long time in the environment. Therefore, the removal of dyes prior to discharge into the environment is essential. Recently, photocatalytic degradation using semiconductor photocatalysts has been extensively studied for dye removal. In this study, titanium dioxide (TiO2) nanoparticle photocatalyst was synthesized for photodegradation of methylene blue (MB) dye under ultra-violet (UV) light. TiO2 nanoparticles were synthesized using the sol-gel method and characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and high resolution transmission electron microscopy (HRTEM). The photocatalytic activity was tested for MB degradation. 75.00% MB was successfully degraded under UV light using synthesized TiO2 after calcination at 400°C. The degradation rate was reduced to 38.60% and 7.05% using TiO2 calcined at 600°C and 800°C, respectively. This was probably due to their nanosize particles, low crystallinity, and anatase phase structure of synthesized TiO2 after calcination at 400°C for 2 hours.
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Effects of Calcination Temperature on TiO2 Nanoparticle Photocatalyst for Methylene Blue Dye Degradation
null
[ "Mohd Hasmizam Razali - Universiti Malaysia Terengganu", "Nursyafiqah Jori Roslan - Universiti Malaysia Terengganu", "Uwaisulqarni M. Osman - Universiti Malaysia Terengganu", "Mohd Zul Helmi Rozaini - Universiti Malaysia Terengganu", "Mahani Yusoff - Universiti Malaysia Kelantan Kampus Jeli" ]
29 June 2020
Effects of Calcination Temperature on TiO2 Nanoparticle Photocatalyst for Methylene Blue Dye Degradation
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00229
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00229
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
Turbidity Removal of Kaolin Wastewater Using Polyacrylamide-Grafted Egg White
null
[ "Nor Fateha Azuan - Soil Assessment and Remediation Research Group, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Malaysia", "Kavirajaa Pandian Sambasevam - School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, Negeri Sembilan Branch, Kuala Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "Nurul` Ain Jamion - Soil Assessment and Remediation Research Group, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Malaysia", "Soon Kong Yong - Soil Assessment and Remediation Research Group, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Malaysia" ]
25 March 2020
Turbidity Removal of Kaolin Wastewater Using Polyacrylamide-Grafted Egg White
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00222
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00222
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
A new oxidation catalyst of Technische Universiteit Delft-Crystalline (TUD-C)-supported tungsten oxide-doped titania (WO3-TiO2/TUD-C) has been successfully synthesized. WO3-modified TiO2 was reported as a potential oxidation catalyst. However, the low surface area and porosity have restricted the catalytic performance of this material. In order to overcome this problem, a mesoprorous zeolitic compound of TUD-C was used as a catalyst support for WO3-TiO2 in this work. The TUD-C-supported 1 mol% WO3-TiO2 was synthesized by adding pre-synthesized WO3-TiO2 onto the TUD-C support. Both X-ray diffractometry and Fourier transform infrared analyses indicated MFI zeolitic framework formation in the TUD-C-supported 1 mol% WO3-TiO2. Both surface area and porosity of the resulting WO3-TiO2/TUD-C were significantly higher than those of bare WO3-TiO2. The catalytic performance of the resulting materials was evaluated through cyclohexane oxidation at 70oC for 4 hours. It has been demonstrated that the catalytic activity of WO3-TiO2 increased approximately 2-fold after loading on TUD-C support.
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
TUD-C-Supported Tungsten Oxide-Doped Titania Catalysts for Cyclohexane Oxidation
null
[ "Chui Min Ling - Universiti Teknologi Malaysia", "Leny Yuliati - Universitas Ma Chung", "Hendrik Oktendy Lintang - Universitas Ma Chung", "Siew Ling Lee - Universiti Teknologi Malaysia" ]
29 June 2020
TUD-C-Supported Tungsten Oxide-Doped Titania Catalysts for Cyclohexane Oxidation
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00228
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00228
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
Synthesis and Characterization of New Stilbenoid Derivatives as Potential Vasodilators
null
[ "Sock Ying Chan - School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia", "Chuan Wei Oo - School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia", "Mun Fei Yam - School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia", "Yean Chun Loh School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau - Pinang, Malaysia" ]
25 March 2020
Synthesis and Characterization of New Stilbenoid Derivatives as Potential Vasodilators
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00221
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00221
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
Energy security is becoming a major concern across the globe which has boosted development of battery technology. Electrolytes play a major part in any battery systems where they are usually in the form of liquid. Electrolytes are usually produced by dissolving ionic dopants in organic solvents. This paper reports the electrical behavior of a plasticized biopolymer film system. The biopolymer film showed good ionic conductivity enhancement when plasticized with ethylene carbonate where optimum value of 7.41 × 10
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Electrical Behavior of Ethylene Carbonate-Plasticized Cellulose Biopolymer Electrolyte Films
null
[ "Mohd Ibnu Haikal Ahmad Sohaimy - Universiti Malaysia Terengganu", "Muhammad Jauhar Ahmad Fauzi - Universiti Malaysia Terengganu", "Mohd Ikmar Nizam Mohamad Isa - Universiti Sains Islam Malaysia" ]
29 June 2020
Electrical Behavior of Ethylene Carbonate-Plasticized Cellulose Biopolymer Electrolyte Films
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00227
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00227
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
The effects of CO
Vol 22 No 2 (2020): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
Carbon Dioxide Sequestration: A Review on the Current Techniques and the Way Forward
null
[ "Collin G. Joseph - Universiti Malaysia Sabah", "Quek Kye Shane - Universiti Malaysia Sabah", "Wan Mohd Ashri Wan Daud - University of Malaya" ]
29 June 2020
Carbon Dioxide Sequestration: A Review on the Current Techniques and the Way Forward
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0027-A00226
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0027-A00226
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0027
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
Photoluminescent Ester Oligomers Containing Curcumin Dye Units: A Selective Fluorescent “Turn off” Chemosensor for Ferric Ions
null
[ "Hoay-Ching Ong - School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia", "Chuan-Wei Oo - School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia" ]
25 March 2020
Photoluminescent Ester Oligomers Containing Curcumin Dye Units: A Selective Fluorescent “Turn off” Chemosensor for Ferric Ions
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00225
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00225
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
Amino Acid Evaluation and GC-MS Analysis of Bambaranut (Vigna subterranea (L) Verdc.)
null
[ "T. M. Abdulmumin - Department of Biochemistry, Faculty of Science, Kano University of Science and Technology Wudil, P.M.B 3244, Kano, Nigeria", "Y. Abdulmumin - Department of Biochemistry, Faculty of Science, Kano University of Science and Technology Wudil, P.M.B 3244, Kano, Nigeria", "A. J. Alhassan - Department of Biochemistry, Faculty of Science, Kano University of Science and Technology Wudil, P.M.B 3244, Kano, Nigeria", "I. A. Muhammad - Department of Biochemistry, Faculty of Science, Kano University of Science and Technology Wudil, P.M.B 3244, Kano, Nigeria", "M. Dalhatu - Department of Biochemistry, Faculty of Science, Kano University of Science and Technology Wudil, P.M.B 3244, Kano, Nigeria", "L. A. Amina - Department of Biochemistry, Faculty of Science, Kano University of Science and Technology Wudil, P.M.B 3244, Kano, Nigeria", "S. A. Bichi - Department of Biochemistry, Faculty of Science, Kano University of Science and Technology Wudil, P.M.B 3244, Kano, Nigeria", "S. I. Sarki - Department of Biochemistry, Faculty of Science, Kano University of Science and Technology Wudil, P.M.B 3244, Kano, Nigeria" ]
25 March 2020
Amino Acid Evaluation and GC-MS Analysis of Bambaranut (Vigna subterranea (L) Verdc.)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00224
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00224
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
A Sol-gel Biosensor for the Detection of Maltose in Starch Hydrolysis
null
[ "A. K. M. Shafiqul - Islam School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia", "Tan Chia Shin - School of Bioprocess Engineering, Universiti Malaysia Perlis (UniMAP), 02600 Arau, Perlis, Malaysia", "Mohd Noor Ahmad - School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia" ]
25 March 2020
A Sol-gel Biosensor for the Detection of Maltose in Starch Hydrolysis
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00223
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00223
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
Murraya Koenigii as Green Corrosion Inhibitor for Mild Steel in CO2-saturated 3.5% NaCl Medium
null
[ "Sarah Balqis Amir - School of Chemical Sciences, Universiti Sains Malaysia, 11800 Gelugor, P. Pinang, Malaysia", "Nurin Asyiqin Sallehudin - School of Chemical Sciences, Universiti Sains Malaysia, 11800 Gelugor, P. Pinang, Malaysia", "Mohamad Nurul Azmi - School of Chemical Sciences, Universiti Sains Malaysia, 11800 Gelugor, P. Pinang, Malaysia", "Mohd. Hazwan Hussin - School of Chemical Sciences, Universiti Sains Malaysia, 11800 Gelugor, P. Pinang, Malaysia", "Afidah Abdul Rahim - School of Chemical Sciences, Universiti Sains Malaysia, 11800 Gelugor, P. Pinang, Malaysia", "Hasnah Osman - School of Chemical Sciences, Universiti Sains Malaysia, 11800 Gelugor, P. Pinang, Malaysia", "Khalijah Awang - Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia", "Pandian Bothi Raja - School of Chemical Sciences, Universiti Sains Malaysia, 11800 Gelugor, P. Pinang, Malaysia" ]
25 March 2020
Murraya Koenigii as Green Corrosion Inhibitor for Mild Steel in CO2-saturated 3.5% NaCl Medium
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00219
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00219
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
Adsorption Kinetics for Carbon dioxide Capture using Bismuth(III) Oxide Impregnated on Activated Carbon
null
[ "Azizul Hakim Lahuri - Department of Basic Science and Engineering, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia - Bintulu Campus, P. O. Box 396, Nyabau Road, 97008 Bintulu, Sarawak, Malaysia", "Rohana Adnan - School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia", "Mohd. Hafiy Mansor - School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia", "Nur Farah Waheed Tajudeen - School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia", "Norazzizi Nordin - School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia" ]
25 March 2020
Adsorption Kinetics for Carbon dioxide Capture using Bismuth(III) Oxide Impregnated on Activated Carbon
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00220
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00220
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
Development of pH Indicator Film Composed of Corn Starch-Glycerol and Anthocyanin from Hibiscus Sabdariffa
null
[ "Muhammad Noor Ikhwan Musa - School of Chemistry and Environment, Faculty of Applied Sciences Universiti Teknologi MARA, Negeri Sembilan Branch, Kuala Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "Tilagam Marimuthu - Centre of Research in Ionic Liquid (CORIL), Universiti Teknologi Petronas, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia", "Hasratul Nadiah Mohd Rashid - School of Chemistry and Environment, Faculty of Applied Sciences Universiti Teknologi MARA, Negeri Sembilan Branch, Kuala Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "Kavirajaa Pandian Sambasevam - School of Chemistry and Environment, Faculty of Applied Sciences Universiti Teknologi MARA, Negeri Sembilan Branch, Kuala Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia" ]
25 March 2020
Development of pH Indicator Film Composed of Corn Starch-Glycerol and Anthocyanin from Hibiscus Sabdariffa
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00218
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00218
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
Effects of Ni2O3 Addition on YBa2Cu3O7-δ(Ni2O3)x Superconductor
null
[ "A. N. Jannah - Faculty of Applied Sciences, Universiti Teknologi MARA, Negeri Sembilan Branch, Kuala Pilah Campus, Pekan Parit Tinggi, 72000 Kuala Pilah, Negeri Sembilan, Malaysia", "I. Mariana - School of Applied Physics, Universiti Kebangsaan Malaysia, 43600 Bandar Baru Bangi, Selangor, Malaysia", "A. Shanthi - Faculty of Applied Sciences, Universiti Teknologi MARA, Negeri Sembilan Branch, Kuala Pilah Campus, Pekan Parit Tinggi, 72000 Kuala Pilah, Negeri Sembilan, Malaysia" ]
25 March 2020
Effects of Ni2O3 Addition on YBa2Cu3O7-δ(Ni2O3)x Superconductor
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00216
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00216
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
null
Vol 22 No 1 (2020): Malaysian Journal of Chemistry (SPECIAL ISSUE)
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
Biochemical and In-vivo Antioxidant Activities of Ethyl Acetate Fractions of Boswellia Papyrifera (Del.) Stem Bark on CCl4-Induced Liver Damage in Wister Rats
null
[ "Y. Abdulmumin - Department of Biochemistry, Kano University of Science and Technology Wudil, Kano, Nigeria 2Department of Human Physiology, Bayero University, Kano, Nigeria", "T. A. Mika’il - Department of Biochemistry, Kano University of Science and Technology Wudil, Kano, Nigeria 2Department of Human Physiology, Bayero University, Kano, Nigeria", "S. I. Sarki - Department of Biochemistry, Kano University of Science and Technology Wudil, Kano, Nigeria Department of Human Physiology, Bayero University, Kano, Nigeria", "I. A. Jibril - Department of Human Physiology, Bayero University, Kano, Nigeria", "I. U. Muhammad - Department of Medical Biochemistry, College of Medical Sciences, Yobe State University Damaturu, Yobe, Nigeria", "A. M. Wudil - Department of Biochemistry, Bayero University, Kano, Nigeria", "A. J. Alhassan - Department of Biochemistry, Bayero University, Kano, Nigeria" ]
25 March 2020
Biochemical and In-vivo Antioxidant Activities of Ethyl Acetate Fractions of Boswellia Papyrifera (Del.) Stem Bark on CCl4-Induced Liver Damage in Wister Rats
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0026-A00217
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0026-A00217
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0026
null
Antibacterial activity; density functional theory (DFT); isatin; optimization; thiocarbohydrazide
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
Synthesis, Characterization, DFT and Antibacterial Screening of Schiff Base Derived from Isatin with Thiocarbohydrazide and Their Cu(II) And Zn(II) Complexes
A Schiff base ligand, N,2-bis(2-oxoindolin-3-ylidene)hydrazine-1-carbothiohydrazine (B1) was synthesized via condensation reaction from isatin and thiocarbohydrazide. The ligand was reacted with copper(II) acetate monohydrate and zinc(II) chloride producing N,2-bis(2-oxoindolin-3-ylidene)hydrazine-1-carbothiohydrazinecopper(II) (CuB1) and N,2-bis(2-oxoindolin-3-ylidene)hydrazine-1-carbothiohydrazinezinc(II) (ZnB1). The ligand structures together with copper and zinc complexes were characterized using elemental analysis, melting point, infrared spectroscopy, 1H and 13C Nuclear Magnetic Resonance spectroscopy and UV-Visible spectroscopy. In this study, the optimized structures of the compounds were calculated using the B3LYP hybrid function with a DNP basis set to evaluate the electronic properties of the compounds. The antibacterial screening using microtitre-plate assay was conducted against Streptococcus mutans Clarke (ATCC 700610) and Staphylococcus aureus subsp. aureus Rosenbach (ATCC 6538) and no significant activity were reported.
[ "Ummi Liyana Mohamad Rodzi - Universiti Teknologi MARA", "Karimah Kassim - Universiti Teknologi MARA", "Amalina Mohd Tajuddin - UiTM Puncak Alam", "Muhamad Kamil Yaakob - Universiti Teknologi MARA", "Nurul Aili Zakaria - Universiti Teknologi MARA" ]
30 June 2022
Synthesis, Characterization, DFT and Antibacterial Screening of Schiff Base Derived from Isatin with Thiocarbohydrazide and Their Cu(II) And Zn(II) Complexes
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-d01a2ab
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-d01a2ab
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.250
Magnetic char; methylene blue; adsorption; food waste; cationic dye
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
Removal of Methylene Blue via Adsorption using Magnetic Char Derived from Food Waste
In this work, the char residue from hydrothermal liquefaction of food waste was chemically treated with potassium hydroxide and modified to prepare magnetic char (MC) adsorbent for removal of methylene blue (MB). The char was modified to prepare MC with improved surface properties and to enhance MB adsorption. The surface chemistry and textural properties of the developed modified char were analyzed by Fourier transform infrared spectroscopy, thermogravimetric analysis, vibrating sample magnetometry, and point of zero charge. Raw char and various treated char and MC prepared at different conditions were used for MB adsorption at selected conditions to identify the best performing adsorbent for further testing in the parametric study. The influence of pH (2–12), adsorbent dosage (0.05–0.15 g), and initial MB concentration (50–250 mg/L) was studied for 30 min at room temperature to determine the conditions for maximum adsorption capacity and removal efficiency of MB using MC. The results show successful impregnation of magnetic nanoparticles (MNP) on activated char for effective MB adsorption and also for MC separation after adsorption. The adsorption capacity of MB achieved approximately 59.8 mg/g with the maximum removal efficiency of 59.8% using selected MC at the conditions of pH 10 and 0.05 g of MC dosage for 30 min. The finding shows that MC has a potential as an effective adsorbent to remove dyes from wastewater and has an advantage to separate adsorbent using magnet.
[ "Noor Raihan Izan - Universiti Teknologi MARA", "Muzakkir Mohammad Zainol - Universiti Teknologi MARA", "Abu Hassan Nordin - Universiti Teknologi Malaysia", "Mohd Asmadi - Universiti Teknologi Malaysia", "Syie Luing Wong - Universidad Rey Juan Carlos", "Muhammad Ammir Ilham Azhar - Universiti Teknologi MARA", "Nur Hashimah Alias - Universiti Teknologi MARA" ]
30 June 2022
Removal of Methylene Blue via Adsorption using Magnetic Char Derived from Food Waste
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-4f6ada9
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-4f6ada9
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.283
Azide reduction; epoxide; epoxidation; ring opening; Tamiflu
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
Diasterocontrol Synthesis of Tamiflu Intermediate of Tert- butyl(5-hydroxy-6-(1-ethylpropoxy)-1,2-epoxycyclohex- 3-en-1-yl)carbamate
A new method for the synthesis of Tamiflu intermediate starting with meso mono-epoxide cyclohexene has been developed. The key synthon tert-butyl(5-hydroxy-6-(1-ethylpropoxy)-1,2-epoxycyclohex-3-en-1-yl)carbamate was synthesized initially by the asymmetric epoxide ring opening reaction using a salen complex catalyst followed by reduction of the azide, amine protection, allylic hydroxylation, alcoholysis with 3-pentanol and epoxidation.
[ "Zurhana Mat Hussin - Universiti Teknologi MARA", "Shaari Daud - Universiti Teknologi MARA", "Fazrul Razman Sulaiman - Universiti Teknologi MARA", "Mohd Tajudin Mohd Ali - Universiti Teknologi MARA" ]
30 June 2022
Diasterocontrol Synthesis of Tamiflu Intermediate of Tert- butyl(5-hydroxy-6-(1-ethylpropoxy)-1,2-epoxycyclohex- 3-en-1-yl)carbamate
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-c6366da
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-c6366da
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.258
Triscatecholate; disodium silicon triscatecholate; pyrocatechol; silicon siderophores
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
Synthesis of Disodium Silicon Triscatecholate from Silica
Triscatecholate is one of the anchor molecules imitating tripodal catecholate assemblies in mussel adhesion proteins and siderophores. These assemblies are biomimetic approaches inspired by natural multivalent metal binders. In this work, disodium silicon triscatecholate, Na2[Si(catecholate)3], was synthesized from the reaction between pyrocatechol (limiting agent) and sodium metasilicate nonahydrate at the mole ratio of 3:1. Two different reaction temperatures, 110oC and room temperature, were tested on two different concentrations of pyrocatechol (0.7247 and 2.7338 mole/L) at the same ratio as that of sodium metasilicate. It was proved by the 1H-NMR spectrum that disodium silicon triscatecholate could be formed at room temperature. However, the product under a high temperature of 110oC provided a high purity product with fewer impurities compared with that under room temperature. At 110oC, the reaction at the lower concentration reduced the possible side reactions compared with the high concentration condition as water would take an important role in the reaction pathway.
[ "Kanda Wongwailikhit - Rangsit University", "Praifon Puangsing - Rangsit University", "Yochio Kabe - Kanagawa University" ]
30 June 2022
Synthesis of Disodium Silicon Triscatecholate from Silica
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-7823ee0
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-7823ee0
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.240
Biochar; cardamom husks; cardamom seed residue; liquid smoke; pyrolysis
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
Conversion of Cardamom By-product into Liquid Smoke and Biochar by Pyrolysis
Most cardamom by-products have not been utilized yet, and by conducting pyrolysis, they can have added value. Pyrolysis is a heating process of biomass without oxygen that produces liquid smoke and biochar. The liquid smoke can be applied as a preservative, and the biochar can be used as an energy source. Cardamom seed residue after oil distillation and the husks were pyrolyzed at 350 – 550 °C with a heating rate of 0.36 - 0.45 °C/s for 1 hour using an N2 carrier gas. The higher yield of liquid smoke (63.91%) was produced after pyrolysis of the husks at 550 °C. At the same time, 51.69% of liquid smoke was produced from pyrolysis of the seed residue at 450 °C. The liquid smoke consisted of chemicals grouped into alcohols, aldehydes, ketones, carboxylic acids, furans, and phenols, with methanol, acetic acid, 1-hydroxy-2-propanone, and furfuryl alcohol as the main compounds. Moreover, 44.86% and 41.86% of biochar were produced from pyrolysis of the husks and the seed residue at 350 °C. The yield of biochar decreased by increasing pyrolysis temperature. After being converted into biochar, the calorific value of the husks and the seed residue increased from 12.95 and 16.24 MJ/kg to 16.79 and 23.07 MJ/kg, respectively.
[ "Dhesti Rahmawati - Jenderal Soedirman University", "Dieni Mansur - Research Center for Chemistry", "Anny Sulaswatty - Research Center for Chemistry", "Hartiwi Diastuti - Jenderal Soedirman University" ]
30 June 2022
Conversion of Cardamom By-product into Liquid Smoke and Biochar by Pyrolysis
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-88cf55c
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-88cf55c
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.293
Alkyl levulinate; levulinate esters; levulinic acid; esterification; biomass
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
A Review on Alkyl Levulinates Synthesis from Renewable Levulinic Acid using Various Modified Carbon-Based Catalysts
Alkyl levulinates have significantly attracted the attention of researchers around the world due to their high potential in various applications especially as fuel-blending chemical to improve fuel properties and performance. Alkyl levulinates can be derived from biomass derivative components such as levulinic acid via alcoholysis reaction. Current research progress on the levulinic acid alcoholysis involves the development of effective catalytic synthesis to improve the levulinates yield. This includes the role of catalyst properties and reaction condition applied during the reaction synthesis. In the last few years, a number of catalysts derived from various types of precursors have been studied to synthesize levulinates from levulinic acid. Catalysts from carbonaceous materials offer several advantages such as environmentally friendly, wide availability, high sustainability, and economical, despite the low alkyl levulinates yield obtained upon the utilization of the catalysts for alcoholysis reaction. Thus, the potential of solid acid carbon-based catalyst has been focused in this review due to the increasing number of applications of carbon-based material as catalyst or catalyst support via various modifications. Extensive research on alkyl levulinates synthesis and applications is required to be emphasized. Therefore, the present article describes the wide potential of alkyl levulinates, fundamental research work, progress research, advantages of alkyl levulinates as a fuel blender, and the future direction for reaction synthesis particularly on the improvement of carbon-based catalyst properties and potential emerging technology.
[ "Abdull Hafidz Hassan - Universiti Teknologi MARA", "Muzakkir Mohammad Zainol - Universiti Teknologi MARA", "Kamarul Ridwan Zainuddin - Universiti Teknologi MARA", "Hafis Adlan Rosmadi - Universiti Teknologi MARA", "Mohd Asmadi - Universiti Teknologi Malaysia", "Norazah Abd Rahman - Universiti Teknologi Malaysia", "Nor Aishah Saidina Amin - Universiti Teknologi Malaysia" ]
30 June 2022
A Review on Alkyl Levulinates Synthesis from Renewable Levulinic Acid using Various Modified Carbon-Based Catalysts
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-57accea
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-57accea
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.264
Immobilized TiO2; acid photo etching; polymer binder; crosslinking reaction; photocatalytic degradation
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
Acid Photo Etching Effect of Epoxidized Natural Rubber (ENR) and Polyvinyl Chloride (PVC) as Polymer Binder
Epoxidized natural rubber (ENR) and polyvinyl chloride (PVC) were used as polymer binders in immobilizing TiO2 on glass substrate by using the dip-coating technique. The acid photo etching process was applied to the immobilized TiO2/ENR/PVC (TEP) samples to study the reaction and surface transformation with the presence of hydrochloric acid (HCl). The photocatalytic activity of the prepared immobilized TiO2/ENR/PVC samples was examined on the degradation of reactive red 4 (RR4) under a 65 W compact fluorescent lamp. All immobilized TiO2/ENR/PVC samples under the acid photo etching process (TEP A) expressed higher photocatalytic activity in comparison with the photo etching process (TEP P). TEP A50 (acid photo etching for 50 h) sample has shown the highest photocatalytic degradation where the pseudo 1st order rate constant (k) value was ca. 0.0694 min-1. However, it is not considered as an optimum sample due to the peel-off effect. The optimum sample for the acid photo etching process was TEP A40 (acid photo etching for 40 h) with 0.0553 min-1. This optimum sample is 2 times faster as compared with the photoetched immobilized TiO2/ENR/PVC, which is primarily due to the surface transformation and formation of C-OH bond from crosslinking reaction of the polymer binder with the HCl as verified from the FESEM and FTIR analysis.
[ "Muhammad Afiq Rosli - Universiti Teknologi MARA", "Siti Raihan Hamzah - [email protected]", "Nur Aien Muhamad - Universiti Teknologi MARA", "Nureel Imanina Abdul Ghani - Universiti Teknologi MARA", "Nadiah Sabihah Md Natar - Universiti Teknologi MARA", "Syahirul Ikhwan Ab Aziz - Universiti Teknologi MARA", "Nur Syazana Nazeri - Universiti Teknologi MARA", "Muhammad Saifulddin Mohd Azami - Universiti Teknologi MARA", "Mohd Azlan Ishak - Universiti Teknologi MARA", "Muhammad Zahiruddin Ramli - Universiti Teknologi MARA Cawangan Pulau Pinang", "Wan Izhan Nawawi - Universiti Teknologi MARA" ]
30 June 2022
Acid Photo Etching Effect of Epoxidized Natural Rubber (ENR) and Polyvinyl Chloride (PVC) as Polymer Binder
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-7ed8e03
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-7ed8e03
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.228
Fabrics; DNA; abandoned building; jungle; construction site; environmental exposure
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
Extraction of DNA from Bloodstained Fabrics Exposed to Different Environmental Conditions
Bloodstains are one of the most common pieces of biological evidence found at the scene of a violent crime. Bloodstains found at a crime scene usually occur on items of clothing. Thus, blood on fabric needs to be understood. This research was conducted to identify the types of fabrics that retain a higher concentration of DNA and the persistence of this DNA when exposed to different environmental conditions such as sunlight, high humidity and heavy rain. Three different locations were used in this study to mimic real crime scenes, namely a jungle, an abandoned building and a construction site. Ten different types of fabrics used for this study were satin, chiffon, linen, polyester, cotton, crepe, argenti, valentro, lycra and georgette. The fabric samples were stained with fresh human blood and exposed to different environmental conditions for seven days. Samples were collected every 24 hours. DNA extraction was done using a NEXprepTM NexK-3100 Genomic Mini Kit. The concentration of DNA was measured using BioPhotometer Plus by Eppendorf. The type of fabric that retained the highest concentration of DNA when exposed under three different environmental conditions was crepe. The concentration of DNA retained by the fabric samples in an indoor abandoned building was higher compared to the concentration of DNA retained by the fabric samples in an outdoor jungle area and outdoor construction site. The amount of DNA recovered from these fabrics varied according to the different environmental conditions. The possibility for DNA contamination increased with time as the bloodstained fabrics were exposed to the uncontrolled environment. Therefore, the biological materials, substrates and effects of environmental exposure need to be properly understood and studied by forensic scientists so that the results of such analyses may be correctly determined and interpreted.
[ "Kavitha Rajagopal - Universiti Teknologi MARA (UiTM)", "Ayu Syaheera Binti Mohd Shahidi - Universiti Teknologi MARA (UiTM)", "Sharifah Nurfitriyani Binti Syed Zubir - Universiti Teknologi MARA (UiTM)", "Ain Khairunnisa Binti Rusli - Universiti Teknologi MARA (UiTM)" ]
15 June 2022
Extraction of DNA from Bloodstained Fabrics Exposed to Different Environmental Conditions
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-da1facd
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-da1facd
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.199
N,O-heterobicyclic octane: anticancer; retronecine; cis-butyrolactone
Vol 24 No 2 (2022): Malaysian Journal of Chemistry
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
Asymmetric Synthesis of Hydroxy N,O-Heterobicyclic Octanes
A new asymmetric synthesis of several hydroxy N,O-heterobicyclic octanes is described in this paper. The synthesis employed Salen catalysed epoxide ring opening of the starting material meso-cyclohexene followed by the azide reduction and NBoc protection of (1S,6S)-6-azido-3-cyclohexenol, allylic hydroxylation and lactonization with final carbonyl reduction to produce hydroxy N,O-heterobicyclic octane.
[ "Nur Shahidah Sharoman - Universiti Teknologi MARA", "Syahrul Imran - Universiti Teknologi MARA", "Mohd Tajudin Mohd Ali - Universiti Teknologi MARA" ]
30 June 2022
Asymmetric Synthesis of Hydroxy N,O-Heterobicyclic Octanes
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-9d78c43
https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-9d78c43
https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036
https://doi.org/10.55373/mjchem.v24i2.223

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