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JURNAL KIMIA SAINS DAN APLIKASI
Published by Universitas Diponegoro
ISSN : 14108917     EISSN : 25979914     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering
urnal Kimia Sains dan Aplikasi (p-ISSN: 1410-8917) and e-ISSN: 2597-9914) is published by Department of Chemistry, Diponegoro University. This journal is published four times per year and publishes research, review and short communication in field of Chemistry.
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Articles 5 Documents
 1 
Search results for , issue "Vol 25, No 7 (2022): Volume 25 Issue 7 Year 2022" : 5 Documents clear
Preparation of CoFe2O4/SiO2/Ag Magnetic Composite as Photocatalyst for Congo Red Dye and Antibacterial Potential Salni Salni; Muhammad Said; Eliza Eliza; Anggun Dita Dyah Gayatri; Poedji Loekitowati Hariani
Jurnal Kimia Sains dan Aplikasi Vol 25, No 7 (2022): Volume 25 Issue 7 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.25.7.235-244

Abstract

This research reports the synthesized CoFe2O4/SiO2/Ag magnetic composite used as a photocatalyst to degrade Congo red dye and antibacterial agent against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). The catalysts were characterized using XRD, SEM-EDS, VSM, UV-DRS, and pHpzc. The effects of photocatalyst dose (0.25, 0.5, 0.75, and 1.0 g/L), dye concentration (10, 20, 30, and 40 mg/L), and irradiation time (0–210 minutes) were all examined as photocatalytic degradation variables. The results showed that the CoFe2O4/SiO2/Ag composite was superparamagnetic with a saturation magnetization of 41.82 emu/g and had a band gap of 1.82 eV. The highest efficiency of decreasing the concentration of Congo red dye of 93.70% was obtained with an initial concentration of 10 mg/L, a catalyst dose of 0.5 g/L, and an irradiation time of 180 minutes. This study indicated that the composite had antibacterial properties against Gram-positive (S. aureus) and Gram-negative (E. coli) bacteria with the same MIC value of 1.25%. These results indicated that the CoFe2O4/SiO2/Ag composite has significant potential for applications in wastewater treatment.
Preparation of Zinc Oxide/Graphite Composite Using Solid-State Method as an Anode Material for Lithium-Ion Battery Hendri Widiyandari; Hanaiyah Parasdila; Anisa Surya Wijareni
Jurnal Kimia Sains dan Aplikasi Vol 25, No 7 (2022): Volume 25 Issue 7 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.25.7.245-252

Abstract

Lithium-ion batteries using zinc oxide (ZnO) as anode material had a high theoretical capacity of about 987 mAh/g. Unfortunately, ZnO capacity can drop below 200 mAh/g after only a few cycles. For that reason, graphite was added in this study due to its stable theoretical capacity of around 348-374 mAh/g to maintain the stability of lithium-ion battery capacity. Zinc oxide/graphite (ZnO/Graphite) was prepared using a solid-state method, in which ZnO and graphite were mortared until homogeneous with the mass ratio of (2:1), (1:1), and (1:2). The SEM images of all samples showed the agglomerate morphology between ZnO and graphite which affect the results of the battery performance test. The final result of the ZnO/Graphite anode can be considered a continuous anode material due to the stable cycle performance obtained in the range of 219.72–371.27 mAh/g with a decreased value of 40% after 55 cycles.
Phenolic Compound in Garlic (Allium sativum) and Black Garlic Potency as Antigout Using Molecular Docking Approach Ayu Rahmania Lestari; Irmanida Batubara; Setyanto Tri Wahyudi; Auliya Ilmiawati
Jurnal Kimia Sains dan Aplikasi Vol 25, No 7 (2022): Volume 25 Issue 7 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.25.7.253-263

Abstract

Phenolics, including flavonoids, are bioactive components in garlic in relatively abundant amounts and are present 2–4 times more in black garlic. Both of these compounds are reported to have biological activity, with one of them acting as an antioxidant. However, its ability as an antigout is still not widely reported. Xanthine oxidase, adenine deaminase, guanine deaminase, purine nucleoside phosphorylase, and 5-Nucleotidase II are involved during the production of uric acid and causes gout. This study predicted the potential of the phenolic and flavonoid compounds in garlic and black garlic as antigout in inhibiting five target receptors through a molecular docking approach. Utilizing AutoDock Tools v.1.5.7 for receptor and ligand preparation, AutoDock Vina and AutoDock4 for molecular docking, and LigPlot+ and PyMOL for visualization. About 21 compounds from the phenolic and flavonoid groups were used as test ligands and 16 reference ligands (substrate and commercial). SwissADME predicted the pharmacokinetic parameters. The results showed that apigenin, morin, resveratrol, kaempferol, (+)-catechin, isorhamnetin, and (-)-epicatechin were predicted to have good interactions at each target receptor and had the potential to be developed as candidates for multi-target antigout. Based on the pharmacokinetic parameters, all these compounds had good scores in each, making them feasible to continue in vitro or in vivo trials.
Oliveramine: An Isolated Alkaloid from Fagraea fragrans (Tembesu) Bark Dasril Basir; Jefri Liasta; Annisa Amelia; Miksusanti Miksusanti; Susilawati Susilawati
Jurnal Kimia Sains dan Aplikasi Vol 25, No 7 (2022): Volume 25 Issue 7 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.25.7.264-269

Abstract

This paper described the progress of phytochemical, especially alkaloids, work on Fagraea fragrans species (tembesu), Loganiaceae. A dimeric-pyridine alkaloid with molecular formula C20H20O4N2 has been successfully isolated from diethyl ether extracts from this plant’s barks. The alkaloid was explored from diethyl ether extracts using sulphuric acid (2%), then basified with ammonium hydroxide (25%) until the solution had a pH of 10.5. The later solution was extracted again with chloroform. The alkaloid residue was subjected to column chromatography and eluted with 10% acetone in chloroform. The chemical structure of the isolated dimeric-pyridine alkaloid was determined by LCMS/MS, 13C-NMR, and 1H-NMR spectroscopies. As a result, the isolated dimeric-pyridine alkaloid was closely similar to the oliveramine alkaloid, and this is also the first report about oliveramine from Fagraea fragrans (F. Fragrans).
Determination of Antihistamine in Tablets Preparation by Fluorescence Quenching Method Aditya Singgih Raharjo; Asmiyenti Djaliasrin Djalil; Pri Iswati Utami
Jurnal Kimia Sains dan Aplikasi Vol 25, No 7 (2022): Volume 25 Issue 7 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.25.7.231-234

Abstract

The fluorescence properties of complexes of dexchlorpheniramine maleate (DXC) and erythrosine B (ERB) under buffer conditions have been observed through experiments. After the excitation was maintained at 504 nm, the emission wavelength was measured at 556 nm. The outcome demonstrated that the amount of DXC added to the mixture causes the fluorescence of erythrosine to be correspondingly quenched. This system functions best at a pH of 3.6. The research demonstrates the potential of ERB as a complexing agent for DXC quantitative analysis through complex ion formation.

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