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Pluchea indica (L.) Less; Clinacanthus nutans; Phyllanthus niruri; Beluntas; Belalai Gajah; Dukung Anak; metal-natural extract complexes; antibacterial agent

https://doi.org/10.55373/mjchem.v24i2.215

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-c22fc9d

Metal-based compounds consist of an organic substituent as the ligand and an inorganic substituent as the metal center. Natural products, particularly natural extract, are well known to exhibit excellent biological activities, while the inorganic substituents are usually metal ions. Metal ions, especially transition metals, exhibit different oxidation states and can interact with any ligands. Advances in inorganic chemistry provide better opportunities to use metal-based compounds as therapeutic agents. The mode of action of these metal-based compounds on living organisms is different from non-metals. The unique properties of metal ions should be exploited to design new compounds. Pluchea indica (L.) Less (locally known as Beluntas), Clinacanthus nutans (locally known as Belalai Gajah), and Phyllanthus niruri (locally known as Dukung Anak) are medicinal plants that possess various biological properties. Incorporation of transition metal ions (Cu2+, Ni2+, Co2+, Zn2+) into the crude extracts from these medicinal plants would give metal-natural extract complexes of the plants. Leaves of Pluchea indica (L.) Less, Clinacanthus nutans, and Phyllanthus niruri were collected and extracted with either methanol or ethanol and reacted with various transition metal salts to yield metal-natural extract complexes. The metal-natural extract complexes were assessed for their antibacterial activities using quantitative and qualitative antibacterial assays against four pathogenic bacteria, which were Staphylococcus aureus (ATCC 29213), Bacillus cereus (ATCC 117788), Pseudomonas aeruginosa (ATCC 27853), and Escherichia coli (ATCC 25922). The antibacterial assays showed that the biological activities of the metal-natural extract complexes were enhanced and selective towards selected target bacteria. It was found that the identity of transition metal ions plays an important role in enhancing the bioactivity exhibited by the metal-natural extract complexes. The results showed that these metal-natural extract complexes of Pluchea indica (L.) Less, Clinacanthus nutans, and Phyllanthus niruri are potential alternative antibacterial agents.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-c22fc9d

15 June 2022

Antibacterial Activities of Metal-Natural Extract Complexes

Antibacterial Activities of Metal-Natural Extract Complexes

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Soybean curd residue; phosphoric acid; biochar; pyrolysis; carbon dioxide

https://doi.org/10.55373/mjchem.v24i2.207

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-35d9071

Biochar is being increasingly applied for carbon dioxide (CO2) capture to preserve environmental quality. The use of soybean waste, soybean curd residue (SCR) as CO2 adsorbents can help to reduce the uncontrolled disposal of SCR. In this research, SCR-based biochar (Biochar@SCR) was prepared by pyrolysis process. For chemical activation, Biochar@SCR was immersed for 12 hours in 42.5 wt.% H3PO4 solution at 1:1 ratio (g precursor/g H3PO4) to obtain Biochar@SCR-M1. Biochar@SCR-M2 was produced when Biochar@SCR-M1 was pyrolyzed again at 500⁰C for 2 hours. Elemental and functional groups analyses showed the presence of elemental phosphorus (P) and functional groups of P=O or P=OOH for Biochar@SCR-M1 and Biochar@SCR-M2, suggesting the chemical modification using H3PO4 was successful. Morphological analysis revealed the formation of pores after the pyrolysis process and chemical treatment with H3PO4. Analysis of CO2 adsorption depicted that the adsorption capacities of SCR, Biochar@SCR, Biochar@SCR-M1, and Biochar@SCR-M2 were 3.00 mg/g, 25.21 mg/g, 30.50 mg/g, and 36.00 mg/g, respectively. This result proved the increased CO2 sorption for H3PO4-treated Biochar@SCR, suggesting that phosphoric acid modification is an effective method for preparing biochar with high carbon dioxide adsorption.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-35d9071

15 June 2022

Enhanced Adsorption of Carbon Dioxide by Phosphoric Acid-Modified Soybean Curd Residue Biochar

Enhanced Adsorption of Carbon Dioxide by Phosphoric Acid-Modified Soybean Curd Residue Biochar

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

M. speciosa; Rubiaceae; antioxidant; antimicrobial; cytotoxic assay

https://doi.org/10.55373/mjchem.v24i2.191

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-d012429

The leaves of Mitragyna speciosa were traditionally used by natives as a substitute for opium. Nowadays, recreational use of M. speciosa leaves is increasing and has become a concern because of the lack of information and studies about its potential health risks. This study evaluated the antioxidant, antimicrobial, and cytotoxic activities of the crude hexane and DCM extracts of M. speciosa. Antioxidant activity was tested against DPPH, ABTS, beta carotene bleaching, FRAP, and total phenolic content (TPC) assays. Antimicrobial activity was investigated by disc diffusion and microdilution methods to determine the zone of inhibition, MIC and MBC values. The cytotoxic activity was evaluated using MTT assays. Two breast cancer cell lines (MCF7 and MDA-MD-231), two colon cancer cell lines (SW948 and HT29) and a lung cancer cell line were tested with the DCM and hexane extracts (A549). The DCM leaf extract showed the highest total phenolic content (TPC) (84.63±9.01 μg GE/mg) while the hexane extract showed the lowest total phenolic content (74.04±7.07 μg GE/mg). However, the total flavonoid (TFC) content was higher in the hexane extract (97.14±1.74 μg QE/mg) than the DCM extract (59.88±4.25 μg QE/mg). Both extracts showed DPPH free radical scavenging (EC50 >1mg/mL), ABTS (hexane extract: 20.84±0.92 mg/mL; DCM extract: 39.49±2.28 mg/mL) and beta carotene bleaching (hexane extract: 78.29 μg/mL; DCM extract: 75.17±3.26 μg/mL), FRAP (hexane extract: 11.45±0.99 μg/mL; DCM extract: 7.94±0.96 μg/mL). The cytotoxic assay for the DCM extract was moderately toxic (IC50 value ranging 2.86 to 14.81 μg /mL) on tested cancer cells, while the hexane extract showed IC50 values of more than 100 μg/mL for most of the tested cells. All extracts exhibited moderate to weak action, with MIC/MBC values ranging from 0.625 to 10 mg/mL. These findings demonstrated that the M. speciosa extracts possessed a variety of important biological properties.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-d012429

15 June 2022

Antioxidant, Antimicrobial, and Cytotoxic Activities of the Hexane and Dichloromethane extracts of Malaysian Mitragyna spesioca Korth. Leaves

Antioxidant, Antimicrobial, and Cytotoxic Activities of the Hexane and Dichloromethane extracts of Malaysian Mitragyna spesioca Korth. Leaves

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Aromatic rice; In vitro cultured; BAP hormone; Phytochemical screening

https://doi.org/10.55373/mjchem.v24i2.184

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-53801eb

This study aimed at screening the phytochemical content of in vitro grown Oryza sativa L. Cv. MRQ 74 and to determine its anti-cancer and cytotoxicity properties. The dehusked seeds of Oryza sativa L. Cv. MRQ 74 were surface sterilised using Clorox and Tween 20. The surface sterilised seeds were then cultured into MS media. Stems of 6-week-old aseptic seedlings were cultured on MS media with and without BAP hormones. The explants were cultured onto MS media fortified with 0.1 mg/L BAP and hormone-free as a control. Crude extracts of the stems and leaves of raised plantlets were prepared by maceration. Phytochemical screenings were conducted to detect the presence of flavonoids, alkaloids, saponins, tannins, terpenoids, resins, phenols, reducing sugar and iodine. Anti-cancer and cytotoxicity tests were done on HepG2 and Vero cells using MTT assays. The results revealed that the crude extracts derived from plantlets grown on MS media with and without BAP were found to be rich in saponins, terpenoids, resins and reducing sugar. There was no evidence of flavonoids, alkaloids, tannins, carbohydrates or starch in both crude extracts. BAP crude extracts have potential as an anti-cancer agent as they only require low concentrations to inhibit the growth of HepG2 cells.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-53801eb

15 June 2022

Phytochemical Analysis and Biological Activity of Malaysian In Vitro Cultured Aromatic Rice (Oryza sativa L. Cv. MRQ 74)

Phytochemical Analysis and Biological Activity of Malaysian In Vitro Cultured Aromatic Rice (Oryza sativa L. Cv. MRQ 74)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Drug residues; HPLC-UV; thin-film microextraction; tricyclic antidepressant drugs

https://doi.org/10.55373/mjchem.v24i2.166

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-d1753b4

Thin-film polyelectrolyte multilayers (PEMs), namely poly(allylamine hydrochloride) (PAAH) and poly(styrene sulfonic acid) (PSS), were successfully prepared as a new extraction medium for drugs. Three kinds of tricyclic antidepressant drugs (TCAs), namely imipramine (IMI), amitriptyline (AMI), and chlorpromazine (CHLO) were selected as target model analytes. Thin-film microextraction (TFME) was performed by piercing 7 (approx. 8.4 mg) circular cellulose acetate-polyelectrolyte multilayers (CA-PEMs) (5 mm diameter) with a needle and directly dipping them into a sample solution which was agitated during the extraction process. The CA-PEMs were ultrasonicated for analyte desorption in 100 µL of organic solvent before analysis with high-performance liquid chromatography with ultraviolet detection (HPLC-UV). Several important parameters such as type of desorption solvent, the effect of sample pH, salting-out effect, extraction time, desorption time, the volume of desorption solvent, and stirring speed were evaluated and optimized. Under optimized extraction conditions, the technique demonstrated good linearity in the concentration range of 10-1000 µg L-1 for lake and river water samples, and 50-1000 µg L-1 for urine samples. The detection limits were in the range of 3.7 - 40.5 µg L-1. The percentage recoveries were generally in the range of 99 - 111.18 %, with an RSD of 2.6 - 4.7 % (n=3). The facile synthesis conditions also indicate that the proposed method has good applicability in terms of simplicity, effectiveness, selectivity and accuracy. Thus, this method proved to be a suitable alternative green method for analysis of TCAs in different matrices.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-d1753b4

15 June 2022

Optimization of Thin-film Microextraction using a Polyelectrolyte Multilayer Sorbent Combined with HPLC-UV for Separation and Determination of Tricyclic Antidepressant Residues in Aqueous Samples

Optimization of Thin-film Microextraction using a Polyelectrolyte Multilayer Sorbent Combined with HPLC-UV for Separation and Determination of Tricyclic Antidepressant Residues in Aqueous Samples

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Nanofibers; electrospinning; graphene oxide; adsorption; methylene blue

https://doi.org/10.55373/mjchem.v24i2.158

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-195e890

Polymeric nanofibres can be good dye adsorbents as they have large surface areas, good connectivity, and tunable wettability. In this study, recycled polyethylene terephthalate (rPET) nanofibres loaded with graphene oxide (GO) in various amounts (0 - 1.5 v/v%) were fabricated using the electrospinning technique. GO is a carbonaceous material that exhibits a large specific area and contains an oxygenous functional group that significantly enhances the performance of electrospun nanofibres. Scanning electron microscopy images showed that rPET/GO had smooth fibres with diameters as low as 118 ± 56 nm. Fourier-Transform Infrared Spectroscopy (FTIR) confirmed GO had been well incorporated in the rPET nanofibres. The use of GO as a filler increased the tensile strength to 32.84 ± 0.33 MPa, and thus enhanced the mechanical properties of the polymeric nanofibres. The adsorption capacity of the rPET/GO nanofibres for methylene blue (MB) was evaluated, and rPET nanofibres loaded with GO showed better adsorption compared with pure rPET nanofibres. From this study, rPET/GO nanofibres show good potential as adsorbents for the treatment of dyes in wastewater.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-195e890

15 June 2022

Fabrication and Characterisation of Recycled Polyethylene Terephthalate/Graphene Oxide Nanofibres as a Potential Adsorbent for Methylene Blue

Fabrication and Characterisation of Recycled Polyethylene Terephthalate/Graphene Oxide Nanofibres as a Potential Adsorbent for Methylene Blue

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Adsorption; cetylpyridinium chloride; grated coconut; fixed-bed column; Yoon-Nelson model

https://doi.org/10.55373/mjchem.v24i2.150

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-95e24b5

The use of shredded coconut residue as a new low-cost adsorbent for the removal of Reactive Orange 16 (RO16) dye was investigated. A continuous adsorption technique on a fixed-bed column was used to remove RO16 using an adsorbent produced from grated coconut residue that had been chemically treated with the cationic surfactant cetylpyridinium chloride (CPC). The raw grated coconut (RGC) and surfactant modified grated coconut (SMGC) were characterised by Fourier Transform Infrared (FTIR) spectrophotometry and Field Emission Scanning Electron Microscopy (FESEM). The FTIR spectra demonstrated CPC adherence to the SMGC, with two distinct peaks originating from CPC appearing at 2921 and 2853 cm-1. The FESEM image indicated that SMGC had an irregular and uneven surface. The column breakthrough investigation revealed that column characteristics such as adsorbent bed height and inlet dye flow rate impacted the results. Although breakthrough time increased with bed height, it was discovered that a higher initial dye input concentration and a quicker flow rate resulted in a shorter breakthrough time. The adsorption data were fitted to the Yoon-Nelson mathematical model for predicting breakthrough curves and timings. The findings of the Yoon-Nelson model for the 50% breakthrough time varied from 5.25 to 35.45 min. The results of this model agreed with the experimental data as the correlation coefficients, R2, for all three parameters were > 0.99. SMGC was thus found to be an efficient adsorbent for removing RO16 from aqueous solution.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-95e24b5

15 June 2022

Utilisation of Cationic Surfactant Modified Grated Coconut Residue for the Removal of Reactive Orange 16 Dye from Aqueous Solutions: A Fixed-Bed Column Study

Utilisation of Cationic Surfactant Modified Grated Coconut Residue for the Removal of Reactive Orange 16 Dye from Aqueous Solutions: A Fixed-Bed Column Study

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Xanthorrhizol; hyaluronidase; Molecular Docking; ADME Profile

https://doi.org/10.55373/mjchem.v24i2.120

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-f662782

Hyaluronidase (Hyal) enzyme is a potential biological target for the development of anti-inflammatory agents. Xanthorrhizol, a bisabolene sesquiterpenoid isolated from Curcuma xanthorrhiza has been reported to show anti-inflammatory activity against cyclooxygenase (COX), inducible nitric oxide synthase (iNOS), and interleukins (IL). However, the activity of xanthorrhizol as a Hyal inhibitor has not been exploited. In this study, a total of 26 xanthorrhizol derivatives with structural modifications at the R1 - R4 scaffold were chosen. Molecular docking was performed to virtually screen their structure-activity relationships towards Hyal, while ADME prediction was done to predict their pharmacokinetic profiles. All derivatives bound to the active site of Hyal1 with binding energies ranging from -5.7 kcal/mol to -8.5 kcal/mol. Derivatives 24 and 14 with a benzyloxy moiety at position R1 and polar moieties at positions R3 and R4 showed lower binding energies (-8.3, and -7.9 kcal/mol, respectively) compared to apigenin, 28 (-7.9 kcal/mol) and xanthorrhizol, 1 (-6.5 kcal/mol). These derivatives also fulfilled all ADME and drug-likeness properties, indicating they were potential Hyal inhibitors. Through this work, the activity of xanthorrhizol derivatives against Hyal1 may be predicted and screened as a basis for future modifications of xanthorrhizol to create a potential Hyal inhibitor.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-f662782

15 June 2022

Molecular Docking and ADME Profiling of Xanthorrhizol Derivatives as Hyaluronidase Inhibitors

Molecular Docking and ADME Profiling of Xanthorrhizol Derivatives as Hyaluronidase Inhibitors

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Eggshell membrane; free fatty acid; used cooking oil; cationic and anionic dyes

https://doi.org/10.55373/mjchem.v24i2.110

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-9ff0707

In this study, eggshell membrane (ESM) was functionalized with free fatty acids (FFAs) from new and used palm cooking oil to produce ESM@FFAs-NCO and ESM@FFAs-UCO respectively for use as adsorbents for cationic and anionic dyes. The synthesis protocol was optimized, and it was found that the optimum time for the reaction of ESM with FFAs was 15 minutes and the optimum mass ratio of ESM to FFAs was 1:4. Both adsorbents were characterized using SEM and FTIR. The functionalized ESM was found to have a more extensive microporous network structure than that of non-functionalized ESM. FTIR analysis confirmed the successful attachment of FFAs onto the surface of ESM in both ESM@FFAs-NCO and ESM@FFAs-UCO. It was found that the adsorption capability of the adsorbents towards Alizarin Red from worst to best followed the order: ESM < ESM@FFAs-NCO < ESM@FFAs-UCO. Functionalized ESM produced a synergistic effect due to hydrogen bonding and hydrophobic interactions when adsorbing dyes on its active sites. A higher dye removal efficiency was obtained when using ESM@FFAs-UCO due to its greater long alkyl chain content, giving better hydrophobic behaviour. Therefore, ESM@FFAs-UCO was investigated as an adsorbent for other organic dyes such as Rhodamine B, Chicago sky blue, and Remazol dye. The removal percentages obtained were 87.83% for Alizarin Red, 84.59% for Remazol, 78.34% for Rhodamine B and 65.68% for Chicago Sky Blue.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-9ff0707

15 June 2022

Synthesis and Characterization of Eggshell Membrane Functionalized with Free Fatty Acids as Potential Adsorbents for Anionic and Cationic Dyes

Synthesis and Characterization of Eggshell Membrane Functionalized with Free Fatty Acids as Potential Adsorbents for Anionic and Cationic Dyes

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Response surface methodology; waste cooking oil; transesterification, biodiesel

https://doi.org/10.55373/mjchem.v24i2.97

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-c905601

Optimization of reaction parameters for biodiesel production is crucial to develop a more efficient and cost-effective system in the biodiesel industry. The transesterification reaction is affected by several factors, which are alcohol to oil molar ratio, reaction temperature, reaction time, and catalyst loading. In this study, the Response Surface Methodology (RSM) was utilized to obtain the optimal conditions for maximizing biodiesel yield. RSM using Box-Behnken experimental design that consists of 30 runs (number of experiments) and three blocks was developed to determine the optimal conditions of key parameters, such as (A) methanol:oil ratio (20-40); (B) catalyst loading [0.25-2% (wt/l)]; (C) reaction temperature (50-70°C); and (D) reaction time (1-15 hours). The ANOVA analysis suggested that the quadratic model is significant as the p-value for the model was < 0.0001 and the large F-value of 37.70. The lack of fit p-value of 0.0928 (p-value is not significant) implies that the model fitted all the data. The R2 value of 0.9760 indicates that the model fitted the experimental data. Based on the F-value and p-value of the significant model terms, methanol:oil molar ratio has the largest effect on biodiesel yield compared to other parameters. The optimum conditions whereby the maximum biodiesel yield of 35.45% was obtained were methanol to oil molar ratio of 34:1; reaction temperature of 68.4 ⁰C; reaction time of 11.9 h; and 1.125 wt% catalyst loading. In terms of interaction, AB, AC, AD, BC, BD, and CD were found to be insignificant model terms as their p-values were higher than 0.05.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-c905601

15 June 2022

Optimisation of Reaction Parameters in Transesterification of Waste Cooking Oil Using Response Surface Methodology

Optimisation of Reaction Parameters in Transesterification of Waste Cooking Oil Using Response Surface Methodology

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Water Quality; Taman Negara Pahang; Sat River; Tahan River; WQI-DOE Index

https://doi.org/10.55373/mjchem.v24i2.143

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-da78849

Rivers, particularly in national parks like Taman Negara Pahang, play an important role in sustaining aquatic life forms, besides the livelihood of the locals. In conserving the area, particularly in observing the tributary locality effects unto upstream and downstream of the Tembeling River, water quality study has been carried out in two tributaries, namely, Sat and Tahan. Sampling was conducted at eight sampling locations for each river, and the parameters analysed were temperature, pH, Total Suspended Solids (TSS), Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), and ammoniacal nitrogen (AN). Results were then used in calculating the rivers’ WQI-DOE water quality indices. In comparison, through the WQI-DOE indexing, overall, the Tahan River scored slightly lower than the Sat River by obtaining the water quality of Class II, while the Sat River was of Class I. The one-way Analysis of Variance (ANOVA) with a confidence level of 95% showed that all water quality parameters measured exhibited no significant differences between the sampling stations locality. Thus, indicating that the locality of the rivers does not interfere with the water quality readings obtained.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-da78849

15 June 2022

Comparative Water Quality Analysis Between Tahan River and Sat River in Taman Negara Pahang, Malaysia

Comparative Water Quality Analysis Between Tahan River and Sat River in Taman Negara Pahang, Malaysia

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Chitosan; nanohybrid; dispersive solid phase extraction; Box Behnken design; non-steroidal anti-inflammatory

https://doi.org/10.55373/mjchem.v24i2.131

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-45e3c3c

Chitosan was hybridised with tetraethoxysilane via hydrolysis to obtain a bio-nanohybrid composite sorbent for dispersive solid-phase extraction (DSPE) of three non-steroidal anti-inflammatory drugs in aqueous samples. Field Emission Scanning Electron Microscope (FESEM) micrographs showed that the bio-nanohybrid composite was composed of spherical-shaped nanoscale particles with sizes ranging from 41.1 - 231.5 nm. The effects of three significant parameters, namely extraction time, sample pH, and desorption time, on the determination of naproxen (NAP), diclofenac sodium (DIC), and mefenamic acid (MEF), were evaluated systematically using the Box Behnken design (BBD). R2 was found to be 0.942 for NAP, 0.966 for DIC and 0.960 for MEF. These results were all close to 1.0, indicating good correlation between predicted and observed values. Under optimized conditions, the DSPE showed good linearity over the range of 0.1 - 500 μgL-1, low detection limits (0.04-0.67 µg/L), excellent limits of quantification (0.15-2.78 µgL-1), excellent relative recoveries (93.06-101.48%) and acceptable precision with relative standard deviation (RSD) values < 7.75%. These results indicate that this bio-nanohybrid composite is a promising sorbent for sorbent-based microextraction and a good alternative to synthetic polymer sorbents.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-45e3c3c

15 June 2022

Bio-Nanohybrid Composite Sorbent-Based Microextraction Combined with High-Performance Liquid Chromatography for NSAIDs in Aqueous Samples

Bio-Nanohybrid Composite Sorbent-Based Microextraction Combined with High-Performance Liquid Chromatography for NSAIDs in Aqueous Samples

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0022-A00182

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0022-A00182

26 November 2018

Chemometrics Approach to Identify Environmental Sources Contributing to Metals Exposure in Non-occupationally Exposed Pregnant Women of Western Australia

Chemometrics Approach to Identify Environmental Sources Contributing to Metals Exposure in Non-occupationally Exposed Pregnant Women of Western Australia

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

Vol 20 No 2 (2018): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00192

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00192

25 February 2019

GC-MS Analysis and Antiasthmatic Activity of Hexane Extract of Phyllanthus amarus (Chanca piedra) L. in Guinea Pig

GC-MS Analysis and Antiasthmatic Activity of Hexane Extract of Phyllanthus amarus (Chanca piedra) L. in Guinea Pig

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00191

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00191

25 February 2019

Microcystin-LR Time-resolved Absorption and Resonance FT-IR and Raman Biospectroscopy and Density Functional Theory Investigation of Vibronic-mode Coupling Structure in Vibrational Spectra Analysis

Microcystin-LR Time-resolved Absorption and Resonance FT-IR and Raman Biospectroscopy and Density Functional Theory Investigation of Vibronic-mode Coupling Structure in Vibrational Spectra Analysis

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00190

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00190

25 February 2019

Effect of Drying Methods on the Colour Parameter, Rehydration Capacity and Antioxidant Activity of Clinacanthus nutans Leaves

Effect of Drying Methods on the Colour Parameter, Rehydration Capacity and Antioxidant Activity of Clinacanthus nutans Leaves

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0024-A00201

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0024-A00201

11 July 2019

Activated Carbon Effects on Morphology and Permeability of Poly(L-lactic acid)-Poly(ethylene glycol) Membranes

Activated Carbon Effects on Morphology and Permeability of Poly(L-lactic acid)-Poly(ethylene glycol) Membranes

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

Vol 21 No 2 (2019): Malaysian Journal of Chemistry (SPECIAL ISSUE)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0024-A00200

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0024-A00200

11 July 2019

Temperature Effects toward Corrosion Rate of Carbon and Mild Steel Using Red Palm Oil as Natural Corrosion Inhibitor

Temperature Effects toward Corrosion Rate of Carbon and Mild Steel Using Red Palm Oil as Natural Corrosion Inhibitor

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

Vol 21 No 2 (2019): Malaysian Journal of Chemistry (SPECIAL ISSUE)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0024-A00199

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0024-A00199

11 July 2019

Biolubricant Production from Palm Stearin Fatty Acids and Pentaerythritol

Biolubricant Production from Palm Stearin Fatty Acids and Pentaerythritol

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

Vol 21 No 2 (2019): Malaysian Journal of Chemistry (SPECIAL ISSUE)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00215

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00215

31 December 2019

Influence of Different Sulphate Salts as Anolytes Towards the Performance of Copper(II) Recovery by using an Electrogenerative Process

Influence of Different Sulphate Salts as Anolytes Towards the Performance of Copper(II) Recovery by using an Electrogenerative Process

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00214

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00214

31 December 2019

Role of Tartaric Acid on Structural, Morphological and Optical Properties of FeSxOy Films Formed by Chemical Bath Deposition

Role of Tartaric Acid on Structural, Morphological and Optical Properties of FeSxOy Films Formed by Chemical Bath Deposition

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00213

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00213

31 December 2019

Synthesis, Characterization and Antimicrobial Investigation of Mixed Ligand Complexes of Cobalt(II) and Nickel(II) with P-Dimethylaminobenzaldehyde Thiosemicarbazone

Synthesis, Characterization and Antimicrobial Investigation of Mixed Ligand Complexes of Cobalt(II) and Nickel(II) with P-Dimethylaminobenzaldehyde Thiosemicarbazone

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00212

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00212

31 December 2019

Quantum Mechanical Studies on the π-π Stacking Interactions of Aniline and Water-assisted Aniline in Gas and Aqueous Phases

Quantum Mechanical Studies on the π-π Stacking Interactions of Aniline and Water-assisted Aniline in Gas and Aqueous Phases

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00211

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00211

31 December 2019

Synthesis, Characterization and Determination of Mesophase Transition of Azo-azomethine Derivatives with Different Terminal Chain Lengths

Synthesis, Characterization and Determination of Mesophase Transition of Azo-azomethine Derivatives with Different Terminal Chain Lengths

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00210

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00210

31 December 2019

A Facile Synthesis of 2-Hydroxy-3-Phenylquinoline Derivatives

A Facile Synthesis of 2-Hydroxy-3-Phenylquinoline Derivatives

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00209

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00209

31 December 2019

Roles of Structural Disorder and Surface State in Photoluminescence of BaTiO3 Nanoparticles

Roles of Structural Disorder and Surface State in Photoluminescence of BaTiO3 Nanoparticles

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00208

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00208

31 December 2019

Synthesis and Evaluation of Bis(2-Ethylhexyl) Phthalate-Imprinted Polymers in an Aqueous Medium

Synthesis and Evaluation of Bis(2-Ethylhexyl) Phthalate-Imprinted Polymers in an Aqueous Medium

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

The epoxidation process of palm oil was carried out using in situ-generated performic acid. Formic acid acts as an oxygen carrier and hydrogen peroxide acts as an oxygen donor in the reaction system. The epoxidation process was performed using a molecular ratio of 5.91 moles of formic acid to 3.60 moles of hydrogen peroxide, reaction temperature of 40ºC and reaction time of 2.55 hours. The validation of the epoxidized palm oil (EPO) molecular structure was confirmed by Fourier Transformation Infra-Red (FTIR) and proton and carbon Nuclear Magnetic Resonance (1H-NMR and 13C-NMR) spectroscopy. High conversion (99.43%) of oxirane ring was obtained with 86% (w/w) yield of EPO. The existence of epoxy group was evidenced by FTIR at 843 cm-1, 1H-NMR chemical shift at 2.89 ppm and 13C-NMR at 54.19-57.22 ppm. The physicochemical properties results show that EPO has higher oxidative stability (190ºC), flash point (255ºC) and viscosity index (133), which make EPO plausible to be used as an industrial fluid.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00203

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00203

31 December 2019

Preparation of Epoxidized Palm Oil by using Performic Acid

Preparation of Epoxidized Palm Oil by using Performic Acid

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00207

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00207

31 December 2019

Optimization Study on the Effects of Shear Rate and Concentration of Inhibitor on Wax and Asphaltene Deposition from Crude Oil using Copolymer and Aromatic Compounds

Optimization Study on the Effects of Shear Rate and Concentration of Inhibitor on Wax and Asphaltene Deposition from Crude Oil using Copolymer and Aromatic Compounds

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00206

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00206

31 December 2019

Study of the Degradation of Carbofuran using Response Surface Methodology

Study of the Degradation of Carbofuran using Response Surface Methodology

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00202

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00202

31 December 2019

Assessment of Nitro-Substituted Aminostilbene as Organic Sensitizer for Dye-Sensitized Solar Cell (DSSC) Application

Assessment of Nitro-Substituted Aminostilbene as Organic Sensitizer for Dye-Sensitized Solar Cell (DSSC) Application

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00205

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00205

31 December 2019

9-Fluorenylmethoxycarbonyl Chloride (FMOC-Cl) as a Potential Precolumn Derivatization Reagent for the Analysis of PPCPs and EDCs using HPLC-DAD

9-Fluorenylmethoxycarbonyl Chloride (FMOC-Cl) as a Potential Precolumn Derivatization Reagent for the Analysis of PPCPs and EDCs using HPLC-DAD

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0025-A00204

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0025-A00204

31 December 2019

Copolymerization of Methacrylic Acid (MAA) and Butyl Acrylate (BuA) via Emulsion Polymerization Technique

Copolymerization of Methacrylic Acid (MAA) and Butyl Acrylate (BuA) via Emulsion Polymerization Technique

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0025

Vol 21 No 3 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0024-A00198

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0024-A00198

11 July 2019

Formulation Screening of Palm-based Nanoemulsion for an Oral Drug Vehicle of Phyllanthin

Formulation Screening of Palm-based Nanoemulsion for an Oral Drug Vehicle of Phyllanthin

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

Vol 21 No 2 (2019): Malaysian Journal of Chemistry (SPECIAL ISSUE)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0024-A00197

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0024-A00197

11 July 2019

Photostability of PVC Films by using Safety Synthetic Biolubricant as Additives

Photostability of PVC Films by using Safety Synthetic Biolubricant as Additives

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

Vol 21 No 2 (2019): Malaysian Journal of Chemistry (SPECIAL ISSUE)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0018-A00158

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0018-A00158

06 August 2018

Chemical Constituents from the Roots of Malayan Murraya Koenigii (Rutaceae)

Chemical Constituents from the Roots of Malayan Murraya Koenigii (Rutaceae)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

Vol 18 No 2 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0018-A00157

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0018-A00157

06 August 2018

Magnetic Field Enhanced Electrocoagulation Using Iron Electrode in Removing Glyphosate from Aqueous Solution

Magnetic Field Enhanced Electrocoagulation Using Iron Electrode in Removing Glyphosate from Aqueous Solution

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

Vol 18 No 2 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0018-A00156

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0018-A00156

06 August 2018

Discovery of New Bioactive Secondary Metabolites from Psychrophilic Microorganisms - Mini Review

Discovery of New Bioactive Secondary Metabolites from Psychrophilic Microorganisms - Mini Review

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

Vol 18 No 2 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0018-A00155

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0018-A00155

06 August 2018

Fast Synthesis of Metal-incorporated NKX-2 (MeNKX-2) Using Novel Ionic Liquid via Ionothermal Approach

Fast Synthesis of Metal-incorporated NKX-2 (MeNKX-2) Using Novel Ionic Liquid via Ionothermal Approach

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

Vol 18 No 2 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0020-A00170

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0020-A00170

08 August 2018

Use of Aluminium Phosphate for Sealing the Electric Arc Thermal Spray Nickel Chromium Alloy Coating

Use of Aluminium Phosphate for Sealing the Electric Arc Thermal Spray Nickel Chromium Alloy Coating

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

Vol 19 No 2 (2017): Malaysian Journal of Chemistry

3,3,7,7-Tetramethyl-tetrahydro-[1,2,4]triazolo[1,2-a][1,2,4]triazole-1,5-dithione 1 has been synthesized from 2-chloropropionyl chloride ammonium thiocyanate, and hydrazine in 96% yield. Criss-cross cycloaddition involving aldazine produced from the acetone-hydrazine reaction was proposed for the mechanism. The structure was confirmed by micro-elemental analysis, FTIR, 1 H and 13C NMR spectroscopy and ESI mass spectrometry. Compound 1 crystallized in monoclinic crystal system with P21/c space group. Antibacterial screening against Staphylococcus epidermidis, Staphylococcus aureus, Bacillus subtilis, Enterococcus faecalis, and Gram-negative bacteria: Enterobacter aerogenes, Klebsiella pneumoniae, Proteus vulgaris, Escherichia coli, and Pseudomonas aeruginosa were conducted. The highest activity was against S. epidermidis (MIC = 1.563 mg/ml and MBC = 1.563 mg/ ml) and Escherichia coli (MIC = 1.563 mg/ml and MBC = 1.563 mg/ml) thus exhibiting a moderate antibacterial activity.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0020-A00169

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0020-A00169

08 August 2018

One-pot Synthesis of 3,3,7,7-Tetramethyl- tetrahydro-[1,2,4] triazolo[1,2-a][1,2,4] triazole- 1,5-dithione and its Biological Activities

One-pot Synthesis of 3,3,7,7-Tetramethyl- tetrahydro-[1,2,4] triazolo[1,2-a][1,2,4] triazole- 1,5-dithione and its Biological Activities

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

Vol 19 No 2 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0020-A00168

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0020-A00168

08 August 2018

Phytochemical Analysis and Hypoglycemic Activity from Ethanolic Extract of Oroxylum indicum (L.) Leaves

Phytochemical Analysis and Hypoglycemic Activity from Ethanolic Extract of Oroxylum indicum (L.) Leaves

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

Vol 19 No 2 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0020-A00167

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0020-A00167

08 August 2018

Ultrasonic Studies of Cu (II) Soap Derived from Seed Oil of Karanj (Pongamia pinnata) in Non-aqueous Binary and Ternary Systems at 298.15 K

Ultrasonic Studies of Cu (II) Soap Derived from Seed Oil of Karanj (Pongamia pinnata) in Non-aqueous Binary and Ternary Systems at 298.15 K

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

Vol 19 No 2 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0019-A00163

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0019-A00163

07 August 2018

Aqueous Uranium Activity Removal by CoFe2O4 Nanoparticles

Aqueous Uranium Activity Removal by CoFe2O4 Nanoparticles

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

Vol 19 No 1 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0019-A00162

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0019-A00162

07 August 2018

Sesquiterpenes and Chromones of Agarwood: A Review

Sesquiterpenes and Chromones of Agarwood: A Review

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

Vol 19 No 1 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0020-A00166

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0020-A00166

08 August 2018

Remediation of Cationic Dye Simulated Wastewater Using Photolysis: Parametric and Kinetic Studies

Remediation of Cationic Dye Simulated Wastewater Using Photolysis: Parametric and Kinetic Studies

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

Vol 19 No 2 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0020-A00165

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0020-A00165

08 August 2018

Influence of pH Value and Temperature on the Formation of Iron Maltodextrin Complex

Influence of pH Value and Temperature on the Formation of Iron Maltodextrin Complex

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0020

Vol 19 No 2 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0019-A00164

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0019-A00164

07 August 2018

In vitro Cytotoxic Activities of Aporphine Alkaloids from the Leaves of Alseodaphne peduncularis (Wall. ex. Ness) Meissn

In vitro Cytotoxic Activities of Aporphine Alkaloids from the Leaves of Alseodaphne peduncularis (Wall. ex. Ness) Meissn

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

Vol 19 No 1 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0019-A00161

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0019-A00161

07 August 2018

Improved Photocatalytic Performance of ZnO through AgCu Bimetal Coupling for the Photodegradation of Nitrobenzene

Improved Photocatalytic Performance of ZnO through AgCu Bimetal Coupling for the Photodegradation of Nitrobenzene

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

Vol 19 No 1 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0019-A00160

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0019-A00160

07 August 2018

FeCl3/ AgOTf Catalyzed Hydroarylation Reactions of Aryl-substituted Alkynes with Different Electron-rich Arenes

FeCl3/ AgOTf Catalyzed Hydroarylation Reactions of Aryl-substituted Alkynes with Different Electron-rich Arenes

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

Vol 19 No 1 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0019-A00159

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0019-A00159

07 August 2018

Role of Organics in Atmospheric Catalytic Autoxidation of Aqueous Sulphur Dioxide in Acidic Medium

Role of Organics in Atmospheric Catalytic Autoxidation of Aqueous Sulphur Dioxide in Acidic Medium

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0019

Vol 19 No 1 (2017): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0018-A00154

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0018-A00154

06 August 2018

Synthesis of Tetra(m-nitrophenyl)porphyrin as Sensing Material for Recognition of Lead(II) Ion

Synthesis of Tetra(m-nitrophenyl)porphyrin as Sensing Material for Recognition of Lead(II) Ion

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

Vol 18 No 2 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0017-A00147

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0017-A00147

05 August 2018

Keggin Heteropoly Acid as a Green and Recyclable Catalyst for One-pot Synthesis of 1,1,3-Triheteroaryl Compounds

Keggin Heteropoly Acid as a Green and Recyclable Catalyst for One-pot Synthesis of 1,1,3-Triheteroaryl Compounds

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

Vol 18 No 1 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0017-A00152

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0017-A00152

05 August 2018

Study on Hydrolysis of Poly(Lactic Acid)/Chitosan/Polyethylene Glycol Nanocomposites in Phosphate Buffer Solution

Study on Hydrolysis of Poly(Lactic Acid)/Chitosan/Polyethylene Glycol Nanocomposites in Phosphate Buffer Solution

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

Vol 18 No 1 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0017-A00151

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0017-A00151

05 August 2018

Effects of Layers and Ratio Cs-TiO2/Glass Photocatalyst towards Removal of Methylene Orange via Adsorption-photodegradation Process

Effects of Layers and Ratio Cs-TiO2/Glass Photocatalyst towards Removal of Methylene Orange via Adsorption-photodegradation Process

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

Vol 18 No 1 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0017-A00150

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0017-A00150

05 August 2018

Colorectal Cancer Screening by Using Urine NMR Spectra

Colorectal Cancer Screening by Using Urine NMR Spectra

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

Vol 18 No 1 (2016): Malaysian Journal of Chemistry

The synthesis and mass spectrometric analysis of aromatic and indole glucosinolates were investigated in this study. It was found that besides the peaks at m/z 75, 80, 96, 97, 195, 259, 275, the mass spectra also contained peaks that served unambiguously to identify a particular glucosinolate based on the loss of SO3 from its unambiguousness to identify a specific ion [M-K]-, and other ions such as [R-C(=NOH)S]-and [R-C(S)OSO2]-generated from the fragmentation of the backbone skeleton of GLs.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0018-A00153

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0018-A00153

06 August 2018

Synthesis and Mass Spectrometric Analysis of Aromatic and Indole Glucosinolates

Synthesis and Mass Spectrometric Analysis of Aromatic and Indole Glucosinolates

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0018

Vol 18 No 2 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0017-A00149

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0017-A00149

05 August 2018

Remediation of Anionic Dye Simulated Wastewater Using TiO2 as a Photocatalyst under Various Light Irradiation Wavelength

Remediation of Anionic Dye Simulated Wastewater Using TiO2 as a Photocatalyst under Various Light Irradiation Wavelength

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

Vol 18 No 1 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0017-A00148

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0017-A00148

05 August 2018

Electrochemical Synthesis of a Metal Organic Framework Material Based on Copper and Benzene–1,3,5–Tricarboxylic Acid Using Applied Current

Electrochemical Synthesis of a Metal Organic Framework Material Based on Copper and Benzene–1,3,5–Tricarboxylic Acid Using Applied Current

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0017

Vol 18 No 1 (2016): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0016-A00146

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0016-A00146

04 August 2018

Pretreatment of Hocmon Betel Leaf to Produce Essential Oils with High Phenolic Content

Pretreatment of Hocmon Betel Leaf to Produce Essential Oils with High Phenolic Content

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

Vol 17 No 2 (2015): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0016-A00145

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0016-A00145

04 August 2018

Polymorphism of L-glutamic Acid: Influence of the Additive Ammonium Sulphate upon the Phase Change between α- and β-polymorphs

Polymorphism of L-glutamic Acid: Influence of the Additive Ammonium Sulphate upon the Phase Change between α- and β-polymorphs

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

Vol 17 No 2 (2015): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0016-A00143

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0016-A00143

04 August 2018

Removal of Malachite Green from Aqueous Solution by Waste Tyre Derived Activated Carbon

Removal of Malachite Green from Aqueous Solution by Waste Tyre Derived Activated Carbon

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

Vol 17 No 2 (2015): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0016-A00142

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0016-A00142

04 August 2018

Volatile Oil Composition of Neobalanocarpus heimii

Volatile Oil Composition of Neobalanocarpus heimii

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

Vol 17 No 2 (2015): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0016-A00141

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0016-A00141

04 August 2018

Polyacrylonitrile Grafted Cassava Starch and its Chemical Modification with Hydroxylamine Hydrochloride

Polyacrylonitrile Grafted Cassava Starch and its Chemical Modification with Hydroxylamine Hydrochloride

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

Vol 17 No 2 (2015): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0024-A00196

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0024-A00196

11 July 2019

Esterification and Evaluation of Palm Oil as Biolubricant Base Stock

Esterification and Evaluation of Palm Oil as Biolubricant Base Stock

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

Vol 21 No 2 (2019): Malaysian Journal of Chemistry (SPECIAL ISSUE)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0024-A00195

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0024-A00195

11 July 2019

Physicochemical Characteristics of Malaysian Crude Palm Kernel Oil

Physicochemical Characteristics of Malaysian Crude Palm Kernel Oil

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

Vol 21 No 2 (2019): Malaysian Journal of Chemistry (SPECIAL ISSUE)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0016-A00144

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0016-A00144

04 August 2018

Investigation on the Applicability of Polyaniline in Primer Systems for Metal Protective Coatings in Corrosion Conditions

Investigation on the Applicability of Polyaniline in Primer Systems for Metal Protective Coatings in Corrosion Conditions

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0016

Vol 17 No 2 (2015): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0024-A00194

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0024-A00194

11 July 2019

Separation of Saturated and Unsaturated Fatty Acids of Palm Fatty Acid Distilled via Low-temperature Methanol Crystallization

Separation of Saturated and Unsaturated Fatty Acids of Palm Fatty Acid Distilled via Low-temperature Methanol Crystallization

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

Vol 21 No 2 (2019): Malaysian Journal of Chemistry (SPECIAL ISSUE)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0024-A00193

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0024-A00193

11 July 2019

Pseudo-ternary Phase Behaviour of Palm-Based Microemulsion Insecticides

Pseudo-ternary Phase Behaviour of Palm-Based Microemulsion Insecticides

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0024

Vol 21 No 2 (2019): Malaysian Journal of Chemistry (SPECIAL ISSUE)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00189

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00189

25 February 2019

The Local Regularity of an Organic Crystal

The Local Regularity of an Organic Crystal

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00188

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00188

25 February 2019

Assessment of Water Quality in The University of The Gambia Environs for Environmental and Human Health

Assessment of Water Quality in The University of The Gambia Environs for Environmental and Human Health

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00185

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00185

25 February 2019

Analysis of Fatty Acid Composition and Physicochemical Characteristic of Trigonella foenum-graecum Linn Ripe Seed by Gas Liquid Chromatography

Analysis of Fatty Acid Composition and Physicochemical Characteristic of Trigonella foenum-graecum Linn Ripe Seed by Gas Liquid Chromatography

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00184

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00184

25 February 2019

A Modified and Validated QuEChERS Method for Agrochemical Residue Analysis in Nicotiana tabacum Leaf Using Green Reagents (Ionic Liquids and Nanocarbons)

A Modified and Validated QuEChERS Method for Agrochemical Residue Analysis in Nicotiana tabacum Leaf Using Green Reagents (Ionic Liquids and Nanocarbons)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00187

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00187

25 February 2019

Removal of Used Motor Oil from Water Body Using Modified Commercial Activated Carbon

Removal of Used Motor Oil from Water Body Using Modified Commercial Activated Carbon

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00186

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00186

25 February 2019

Study of Thermo Physical Properties of Binary Liquid Mixtures of Trichloroethylene with 1-Pentanol at 308 K

Study of Thermo Physical Properties of Binary Liquid Mixtures of Trichloroethylene with 1-Pentanol at 308 K

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

Remediation of 2,4,6-trichlorophenol (2,4,6-TCP) contaminated wastewater was carried out using photocatalysis treatment method in the presence of TiO2 photocatalyst. Parametric and kinetic studies were investigated, in which, the effect of different UV and solar radiation wavelengths, initial concentrations of 2,4,6-TCP (10, 20, 30, 40 and 50 ppm), TiO2 dosages (0.02, 0.04, 0.06 and 0.08 mg l-1) and initial pH (4,7, and 10) on the degradation of 2,4,6-TCP were investigated. According to the result obtained, the degradation efficiency of 2,4,6- TCP was directly proportional to the increase in the TiO2 dosage and initial pH of the solution. However, the degradation efficiency decreased with the increase in the initial concentration of 2,4,6-TCP and irradiation wavelength of UV light or in the presence of solar radiation. UV-C, the shortest wavelength, exhibited the highest degradation percentage (88%) compared to UV-B (83%), UV-A (79%) and solar (30%). The highest TiO2 dosage (0.08 mg/ml), gave the best degradation effect (97%). Alkaline solution condition, pH 10.0, gave the best degradation removal percentage (98%), followed by pH 7.0 (97%) and acidic condition, pH 4.0 (65%). Degradation of 2,4,6-TCP using TiO2 achieved remarkable reduction in chemical oxygen demand (COD) about 82% removal efficiency but no change was observed with the biological oxygen demand (BOD) analysis. The photodegradation of 2,4,6-TCP followed the first order reaction kinetics.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0023-A00183

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0023-A00183

25 February 2019

Effect of Different UV and Solar Radiation Wavelengths on the Photocatalysis Treatment of 2,4,6-Trichlorophenol Contaminated Wastewater: Parametric and Kinetic Studies

Effect of Different UV and Solar Radiation Wavelengths on the Photocatalysis Treatment of 2,4,6-Trichlorophenol Contaminated Wastewater: Parametric and Kinetic Studies

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0023

Vol 21 No 1 (2019): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0021-A00177

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0021-A00177

15 August 2018

Study of Thermo Physical Properties of Binary Liquid Mixtures of Trichloroethylene with 1-Pentanol at 308 K

Study of Thermo Physical Properties of Binary Liquid Mixtures of Trichloroethylene with 1-Pentanol at 308 K

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

Vol 20 No 1 (2018): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0021-A00176

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0021-A00176

15 August 2018

Studies on Separation of Heavy Metals from Aqueous Solutions Using Biosorbents

Studies on Separation of Heavy Metals from Aqueous Solutions Using Biosorbents

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

Vol 20 No 1 (2018): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0021-A00175

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0021-A00175

15 August 2018

Characterisation of Crosslinks in Vulcanised Rubbers: From Simple to Advanced Techniques

Characterisation of Crosslinks in Vulcanised Rubbers: From Simple to Advanced Techniques

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

Vol 20 No 1 (2018): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0021-A00174

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0021-A00174

15 August 2018

Vibrational Biospectroscopic Studies on Anti-cancer Nanopharmaceuticals (Part II)

Vibrational Biospectroscopic Studies on Anti-cancer Nanopharmaceuticals (Part II)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

Vol 20 No 1 (2018): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0021-A00173

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0021-A00173

15 August 2018

Vibrational Biospectroscopic Studies on Anti-cancer Nanopharmaceuticals (Part I)

Vibrational Biospectroscopic Studies on Anti-cancer Nanopharmaceuticals (Part I)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

Vol 20 No 1 (2018): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0021-A00172

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0021-A00172

15 August 2018

Preparation and Properties of Fluorene-based Thienothiophene Substituted Benzothiadiazole Copolymer for the Application of Polymeric Solar Cells

Preparation and Properties of Fluorene-based Thienothiophene Substituted Benzothiadiazole Copolymer for the Application of Polymeric Solar Cells

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

Vol 20 No 1 (2018): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0021-A00171

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0021-A00171

15 August 2018

Molecular Mechanics and Quantum Chemical Study on Sites of Action of Sanguinarine Using Vibrational Spectroscopy Based on Molecular Mechanics and Quantum Chemical Calculations

Molecular Mechanics and Quantum Chemical Study on Sites of Action of Sanguinarine Using Vibrational Spectroscopy Based on Molecular Mechanics and Quantum Chemical Calculations

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0021

Vol 20 No 1 (2018): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0022-A00181

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0022-A00181

26 November 2018

Viscometric Behaviour and Micellization of Copper Surfactants Derived from Sesame (Sesamum Indicum) and Soyabean (Glycine max) Oils in Non-aqueous Solvent

Viscometric Behaviour and Micellization of Copper Surfactants Derived from Sesame (Sesamum Indicum) and Soyabean (Glycine max) Oils in Non-aqueous Solvent

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

Vol 20 No 2 (2018): Malaysian Journal of Chemistry

Rice straw; solid state fermentation; total phenolic content; antioxidant activity

https://doi.org/10.55373/mjchem.v24i2.88

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-d8c433b

Rice straw is an agricultural waste material that is abundantly available in Malaysia. Field burning is the main method used for eliminating rice straw, but this increases air pollution and consequently affects public health. In this study, rice straw was utilized as a substrate for solid state fermentation (SSF) using Aspergillus oryzae. SSF was conducted at 30 °C, with 70 % initial moisture content and 10 % v/v of inoculum level. The effects of fermentation duration on the total phenolic content, total flavonoid content and antioxidant activity were investigated. It was found that solid state fermentation enhanced the extractability of the total phenolic content by 104.4 % and the total flavonoid content by 5.32 % after ten days. The antioxidant activity of rice straw increased as fermentation progressed, with an increase of 90.01 % in DPPH radical scavenging activity and 89.24% in the FRAP value. The activity of xylanase and β-glucosidase enzymes produced during SSF was also investigated to study the relationship between polyphenols and the antioxidant activity of fermented rice straw extracts. Both enzymes showed an increase in activity as fermentation progressed proving that the enzymes played a significant role in releasing bound phenolics during SSF.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-d8c433b

15 June 2022

Enhancement in Extractability of Phenolic Compounds and Antioxidant Activity of Rice Straw Fermented using Aspergillus oryzae

Enhancement in Extractability of Phenolic Compounds and Antioxidant Activity of Rice Straw Fermented using Aspergillus oryzae

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

The new hybrid technique which combines gas chromatography and quadruple time of flight mass spectrometry (GC.MS.EI/Q.TOF) were used for the first time in screening and identification of multiple compounds of agarwood chipwood incense smoke and volatile headspace. To explore chemical constituent of Aquilaria malaccensis which result in the generation of a complex array of secondary metabolites, we described gas chromatography method, coupled to accurate mass time-of-flight mass spectrometry (Q.TOFMS.EI) for the untargeted and comprehensive chemical profiling of chipwood from naturally infected A. quilaria malaccensis trees. Chemical components of agar-wood were extracted by applying a new technique; trapping smoke from burning incense and volatile headspace. The SPME.HS technique, solid phase microextraction (SPME) was employed and gas chromatography (GC.MS.EI/Q.TOF) were used as identification tools for the analysis. Divinylbenzene-carboxen-polydimethyl siloxane (DVB-CAR-PDMS) 50/30 μm fibre was used to extract, and analyze volatile compounds. In total, more than 550 peaks were detected, of which tentative identification of 28 of these compounds was reported, representing the major compounds that are mentioned in the literature of the oil studies. The total ion chromatogram detected compounds are distributed among a wide range over the chemical families. Furthermore, the feasibility of this methodology was achieved in grading agarwood chipwood by correlating the obtained chemical profiles of incense smoke and volatile headspace with the extracted oil profile from agarwood, is mentioned in detail; by the way, the major compounds found was represented by β-agarofuran, dihydro 1.27%, γ-cadinene 3.06%, α-bulnesene 3.68%, cadina-1(10),6,8-triene 3.96%, alloaromadendrene 2.09%, cadalene 3.93%, longifolene 2.43% and δ-cadinene 5.01%. This work was one of the very few works that provided information about agarwood chipwood of A. malaccensis which represented a valuable data. Further-more, the study revealed that the characterization of compounds from agarwood chip- wood was highly possible through incense smoke and volatile compounds.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0022-A00180

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0022-A00180

26 November 2018

Identification of Agarwood (Aquilaria malaccensis) Chips Incense Smoke and Headspace Volatile Compounds by GC-MS.EI.Q.TOF, SPME

Identification of Agarwood (Aquilaria malaccensis) Chips Incense Smoke and Headspace Volatile Compounds by GC-MS.EI.Q.TOF, SPME

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

Vol 20 No 2 (2018): Malaysian Journal of Chemistry

Density and ultrasonic study for the binary mixtures of acetone and nitrobenzene over the entire concentration range were measured at temperatures 313 K. The experimental data was then used to calculate the compressibility and acoustic impedance, molecular free length, inverse relaxation time and excess parameters. The values of excess properties further fitted with Redlich–Kister polynomial equation to estimate the binary coefficients. The resulting excess functions were interpreted in terms of the interactions between the molecules in the binary mixtures. Results confirmed that dipole-dipole intermolecular interaction took place between acetone and nitrobenzene.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0022-A00179

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0022-A00179

26 November 2018

Study of Thermo Physical Properties of Binary Liquid Mixtures

Study of Thermo Physical Properties of Binary Liquid Mixtures

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

Vol 20 No 2 (2018): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0022-A00178

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0022-A00178

26 November 2018

Preparation and Antibacterial Properties of Poly(N-hydroxymethyl Acrylamide)/Na-montmorillonite Composites via in situ Polymerization

Preparation and Antibacterial Properties of Poly(N-hydroxymethyl Acrylamide)/Na-montmorillonite Composites via in situ Polymerization

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0022

Vol 20 No 2 (2018): Malaysian Journal of Chemistry

Dispersive Micro Solid Phase Extraction; Response Surface Methodology; Central Composite Design; tetracycline antibiotics; water samples

https://doi.org/10.55373/mjchem.v24i2.79

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-9b1f41e

A dispersive micro solid phase extraction (D-µ-SPE) method was developed using C18 for the extraction and pre-concentration of tetracycline antibiotics (TCs) in water samples prior to analysis by high performance liquid chromatography - ultraviolet/diode array detector (HPLC-UV/DAD). The selected TCs residues were tetracycline (TC), oxytetracycline (OTC) and doxycycline (DOC). A Central Composite Design (CCD) of Response Surface Methodology (RSM) was used to optimize the mass of sorbent and extraction time. Results showed that the coefficient of determination, R2, for the extraction of the selected TCs was 0.9980, indicating a well fit model. The optimum conditions obtained from the extraction analysis were 75 mg sorbent mass and 30 min extraction time. Under these optimum conditions, good linearities were obtained over the range of 0.1-10 mg L-1 with R2 values of 0.9990-0.9997 and a detection limit of 0.053-0.099 mg L-1. The method was successfully applied to river and tap water samples. The developed method proved to be simple, rapid, and reliable, with good extraction efficiencies for the detection of antibiotics in water samples.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-9b1f41e

15 June 2022

RSM-Optimization Approach for Dispersive Micro Solid Phase Extraction of Tetracycline Antibiotics in Water

RSM-Optimization Approach for Dispersive Micro Solid Phase Extraction of Tetracycline Antibiotics in Water

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Crude Oil; extraction; heterogeneous catalyst; naphthenic acids

https://doi.org/10.55373/mjchem.v24i2.70

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-72619dd

Crude oil processing in a petroleum refinery is important due to the increasing demand for petroleum by-products. The presence of Naphthenic Acids (NAs) in crude oil is of great concern to the petroleum industry as they can cause corrosion problems in the oil refinery process. In this study, the NA extraction reaction was conducted using 2-methylimidazole in ethanol assisted by a heterogeneous catalyst to speed up the reaction. Calcium nitrate Ca(NO3)2 loaded at a concentration of 10% on an aluminium oxide (Al2O3) support was prepared by the Incipient Wetness Impregnation (IWI) method. The feedstock, obtained from Petronas Penapisan Melaka, had an original Total Acid Number (TAN) value of 4.38 mg KOH/g. The operating conditions used in this catalytic extraction reaction included a reagent to oil ratio of 0.5:0.5, catalyst loading at 5, 10, 15 and 20 wt%, a reaction temperature of 35 °C, reaction time of 15 minutes and catalyst calcination temperatures of 700, 900 and 1000 °C. The TAN value of crude oil was successfully lowered to 0.48 mg KOH/g using a Ca/Al2O3 catalyst at a calcination temperature of 1000 °C. The catalyst was extensively investigated using TGA-DTA. Results revealed that a calcination temperature above 700 °C was suitable as all impurities in the metal precursor had been removed. SEM micrographs showed an inhomogeneous distribution of various particle sizes, confirming Ca was present on the prepared catalyst. EDX results confirmed the presence of 6.69 % Ca. It can be concluded that the catalytic extraction reaction method with the aid of Ca/Al2O3 was efficient in removing the NAs from acidic crude oil and lowering the TAN value to less than 0.5 mg KOH/g.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-72619dd

15 June 2022

The Treatment of Acidic Petroleum Crude Oil Assisted by Ca/Al2O3 Catalyst

The Treatment of Acidic Petroleum Crude Oil Assisted by Ca/Al2O3 Catalyst

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Photocatalyst; fluorine-doped tin oxide (FTO); free radical; glycerol conversion; propanol

https://doi.org/10.55373/mjchem.v24i2.59

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-4ae465c

Glycerol is the major by-product of biodiesel produced by the transesterification process. It is abundantly produced, and thus has a low market price although it requires high-cost purification processes and can cause environmental problems. Because of this, efficient utilization of glycerol is necessary to avoid oversupply. In this preliminary study, the photocatalytic conversion of glycerol to propanol using fluorine-doped tin oxide (FTO) is proposed for the first time. This method produces propanol with high selectivity under optimal reaction conditions. For the identification of the conversion product, the surface morphology, composition, reaction yield, and physicochemical state of the prepared photocatalyst were comprehensively characterized by scanning electron microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDX), X-ray diffraction analysis (XRD), X-Ray Photoelectron Spectroscopy (XPS) and high-performance liquid chromatography (HPLC). An optimum glycerol conversion of 86 % and a high propanol selectivity of 100 % was achieved under 80 W of UV light and 90 minutes of reaction time using 10 wt% glycerol solution. The FTO photocatalyst proved very dynamic as various products may be formed under different reaction conditions by optimizing parameters such as reaction time, light, and glycerol concentration.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-4ae465c

15 June 2022

Photocatalytic Synthesis of Propanol from Glycerol with Fluorine-doped Tin Oxide (FTO)

Photocatalytic Synthesis of Propanol from Glycerol with Fluorine-doped Tin Oxide (FTO)

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Antibiofilm; anti-microbial peptides; Fejerverya cancrivora; frog’s mucus

https://doi.org/10.55373/mjchem.v24i2.47

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-fd6c86f

Bacterial biofilms are serious threats to human health as they are resistant to both human defence mechanisms and conventional antimicrobial agents. Biofilms can form on surfaces including those of medical devices and cause chronic infections that are difficult to treat, often requiring the use of large doses of antibiotics or the removal of the contaminated device. Anti-microbial peptides (AMPs) isolated from the skin secretion of frogs have been documented as promising anti-biofilm agents. Malaysia is rich in natural resources, including its rainforests, which are a habitat for amphibians. Hence, this study aimed to screen the mucus of the local frog Fejerverya cancrivora for potential antibiofilm agents against the biofilm former Staphylococcus epidermidis ATCC 35984. The antibiofilm activity of the mucus of F. cancrivora was recorded at the attachment, maturation and dispersion stages of biofilm formation, and found to be 97.67 %, 54.66 % and 11.21 %, respectively. The active antibiofilm component was then fractionated and further purified by C18 reverse phase high-performance liquid chromatography (HPLC) to single out peptides with antibiofilm activity. Peptide sequencing revealed a partial amino acid sequence with 67% similarity to an N-terminal bacterial protein belonging to the bacteriocin family. These results suggest that local frog species could be a potential source of antibiofilm peptides.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-fd6c86f

15 June 2022

Inhibition of Staphylococcus epidermidis Biofilm by a Bacteriocin-Like Peptide from Fejerverya cancrivora

Inhibition of Staphylococcus epidermidis Biofilm by a Bacteriocin-Like Peptide from Fejerverya cancrivora

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Fuzzy Inference System; photocatalysis; reduced graphene oxide; water recovery; zinc oxide

https://doi.org/10.55373/mjchem.v24i2.46

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-30bedfc

In this work, zinc oxide/reduced graphene oxide (ZnO/rGO) composites with different ratios synthesized by a one-pot sol-gel method were tested as photocatalysts for the degradation of methylene blue in aqueous solution. The physicochemical properties of the photocatalysts were characterised by FTIR and SEM-EDX. FTIR analysis showed the existence of various functional groups on the ZnO/rGO surfaces, which indicated strong interactions between the carbonyl, carboxylic, and hydroxyl groups on the rGO with ZnO particles. SEM images revealed a nearly spherical shape for ZnO which was homogeneously distributed on the rGO sheets, while the EDX results confirmed the presence of C, Zn, and O with increasing amounts of rGO. Based on a pseudo first-order kinetic model, the highest degradation rate constant, k, of 2.67 × 10–2 min-1 was obtained with 85% methylene blue degradation using a ZnO/rGO-10 photocatalyst. The relationship between the amount of rGO loadings, degradation percentage and rate constant was discussed using a fuzzy inference system (FIS). The introduction of a fuzzy logic controller (FLC) in this work provides the future direction and prediction for the creation of optimum ZnO/rGO photocatalysts for practical water recovery processes.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-30bedfc

24 May 2022

One-Pot Sol-Gel Synthesis of a Zinc Oxide-Reduced Graphene Oxide Composite: Photocatalysis and Kinetics Studies using a Fuzzy Inference System

One-Pot Sol-Gel Synthesis of a Zinc Oxide-Reduced Graphene Oxide Composite: Photocatalysis and Kinetics Studies using a Fuzzy Inference System

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Adsorbent; lawn grass; nickel(II); sustainable; waste to resource

https://doi.org/10.55373/mjchem.v24i2.29

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-de48e55

Lawn grass is a waste that has the potential to be converted into an adsorbent to remove nickel(II) from aqueous solution. The methodology includes preparation of the adsorbent, performance of nickel(II) adsorption, evaluation of existing models and characterization of absorbent by scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX). The results showed the optimum adsorbent amount, initial pH and time were 0.35 g, 5.62 + 0.38 and 30 minutes, respectively. Inductively coupled plasma - optical emission spectroscopy (ICP-OES) results suggested an ion exchange mechanism through a displacement of alkaline and alkaline earth metal ions by nickel(II) ions. The results were a better fit to the Langmuir isotherm than Freundlich, with a maximum uptake of 42.02 mg/g. The calculated Langmuir maximum uptake value was comparable to other adsorbents. The adsorption performance corresponded excellently with the pseudo-second-order kinetic model compared to the pseudo-first-order kinetic model. These findings indicated that adsorption of nickel(II) using lawn grass involved a homogeneous monolayer surface, with chemisorption as the rate-limiting step. Thermodynamic evaluation revealed that the adsorption process of nickel(II) by lawn grass is non- spontaneous with weak reversible bonding and endothermic reaction. SEM results showed that the irregular and highly porous surface of lawn grass became smooth after the adsorption of nickel(II). The EDX results supported the ICP analysis which suggested an ion exchange mechanism was involved.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-de48e55

15 June 2022

Lawn Grass as A Sustainable Adsorbent for Nickel(II) Removal

Lawn Grass as A Sustainable Adsorbent for Nickel(II) Removal

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Acidic soil; coconut shell ash; soil pH

https://doi.org/10.55373/mjchem.v24i2.24

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-c5e6abf

Utilisation of coconut shell ash (CSA) might improve plant growth, especially in agricultural activities. This study aims to discover the potential of CSA in decreasing soil acidity, especially in soils that use chemical fertilisers or pesticides during crop production. Coconut (Cocos nucifera) shells were collected and CSA was produced by pyrolysis. Fourier-transform infrared (FTIR) analysis was then used to determine the chemical composition of CSA. Three different amounts of CSA (1.0, 3.0, and 5.0 g) were added to 10 g of acidic soil (pH 3.81) and control soil (pH 7.1). The usage of coconut shell ash was proven to be effective in increasing soil pH (reduces acidity). The highest increment of soil pH, up to 7.12, was achieved when 5.0 g of CSA was added. This result suggests that utilisation of CSA on soil will benefit plant growth, and therefore can be used as an alternative to the usage of lime at a reasonable cost.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-c5e6abf

15 June 2022

Utilisation of Coconut (Cocos nucifera) Shell Ash to Improve Soil pH for Agricultural Purposes

Utilisation of Coconut (Cocos nucifera) Shell Ash to Improve Soil pH for Agricultural Purposes

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Eggshell membrane; waste palm cooking oil; free fatty acids; Alizarin Red

https://doi.org/10.55373/mjchem.v24i2.12

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-b2d970e

Eggshell membrane (ESM) was functionalized with waste palm cooking oil (WPCO) and used as an adsorbent (ESM@WPCO) for the removal of toxic Alizarin Red dye from aqueous solutions. SEM analysis of ESM@WPCO revealed a large microporous network of interwoven and coalescing shell membrane fibres. FTIR analysis confirmed the attachment of free fatty acids onto the surface of ESM. The protocol for Alizarin Red removal using ESM@WPCO was optimized for pH, adsorbent dosage, contact time and initial concentration. A maximum removal rate of 93% was achieved at pH 2, with an adsorbent dosage of 20 mg for 50 mg L-1 Alizarin Red, and a treatment time of 40 min. The adsorption isotherms were also analysed using Langmuir and Freundlich models, and it was found that the Freundlich model was better in describing the adsorption isotherm process, with an R2 value of 0.98. From this model, a maximum adsorption capacity (Kf) value of 8.41 mg g-1 was obtained. The adsorption kinetics followed a pseudo-second order model with an R2 value of 0.99. The results also revealed that ESM@WPCO was an effective adsorbent for the removal of Alizarin Red from aqueous solutions.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-b2d970e

15 June 2022

Eggshell Membrane Functionalized with Waste Palm Cooking Oil for Removal of Alizarin Red from Aqueous Solutions

Eggshell Membrane Functionalized with Waste Palm Cooking Oil for Removal of Alizarin Red from Aqueous Solutions

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Heavy metals; water Sample; Energy Dispersive X-Ray Fluorescence; metal index

https://doi.org/10.55373/mjchem.v24i2.1

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0036-3e823ef

The analysis of elemental concentrations as well as physiochemical parameters of water samples can determine the quality of a water system. The Temenggor area is known as one of the largest forest reserves in Peninsular Malaysia. Consequently, the Sustainability Development Goals have a significant effect on this area. This study aims to measure the basic physicochemical parameters as well as the concentrations of selected elements in water samples from this area. Measurements of basic physicochemical parameters such as pH, temperature, pressure, dissolved oxygen (DO), electrical conductivity (C), total dissolved solids (TDS), salinity, and oxidation-reduction potential (ORP) of freshwater samples from rivers such as Sungai Gadong Dalam, Sungai Gadong Luar and Sungai Kelam, as well as Tasik Temenggor, were done in situ using a YSI multiparameter probe meter. The concentrations of ten elements, As, Cd, Cr, Cu, Ni, Pb, Se, Zn, U and Th were measured using an Energy Dispersive X-Ray Fluorescence (EDXRF) Spectrometer. The average concentrations of all elements, except for Zn, were found to be higher than the threshold levels specified in the National Water Quality Standards for Malaysia (NWQSM). The correlation between the physicochemical data and elemental concentrations were evaluated using SPSS IBM 22 software. Seven strong correlation pairs were observed: temperature-pressure, SPC-conductivity, SPC-TDS, SPC-salinity, conductivity-TDS, conductivity-salinity, and TDS-salinity. Meanwhile, strong correlations were found between the concentrations of certain pairs of elements: As-Cr, As-Se, Cd-Cr, Cd-Zn, Cr-Pb, Cr-Zn and Pb-Zn. Cluster analysis grouped the 15 sampling locations into two clusters, Cluster 1 (low elemental concentrations) and Cluster 2 (high elemental concentrations). The heavy metal pollution index (HPI) and metal index (MI) values were also calculated to assess the contamination levels of water samples in this area. Most of the areas exhibited HPI values above 100, indicating heavy metal pollution.

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0036-3e823ef

15 June 2022

Assessment of Water Quality in the Temenggor Forest Reserve Based on Physicochemical Data and Elemental Content

Assessment of Water Quality in the Temenggor Forest Reserve Based on Physicochemical Data and Elemental Content

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0036

Vol 24 No 2 (2022): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0037-218ef83

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0037

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0037-218ef83

23 March 2022

Estimation of Drug-Protein Binding Parameters using Amino Acids as Low Molar Mass Model Compounds: A Review

Estimation of Drug-Protein Binding Parameters using Amino Acids as Low Molar Mass Model Compounds: A Review

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0037

Vol 24 No 1 (2022): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0037-06ae39f

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0037

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0037-06ae39f

23 March 2022

Effects of Electrolyte pH on the Electrodeposition of Nickel on Zincated Aluminium Surfaces

Effects of Electrolyte pH on the Electrodeposition of Nickel on Zincated Aluminium Surfaces

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0037

Vol 24 No 1 (2022): Malaysian Journal of Chemistry

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-abstract.php?abs=J0037-9a5cde8

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0037

https://ikm.org.my/publications/malaysian-journal-of-chemistry/view-pdf.php?idx=J0037-9a5cde8

23 March 2022

A Thermodynamic Analysis of Glycerol Monostearate Production by Glycerolysis

A Thermodynamic Analysis of Glycerol Monostearate Production by Glycerolysis

https://ikm.org.my/publications/malaysian-journal-of-chemistry/abstract-listing.php?jid=J0037

Vol 24 No 1 (2022): Malaysian Journal of Chemistry