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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 6 Documents
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Search results for , issue "Vol 27, No 5 (2024): Volume 27 Issue 5 Year 2024" : 6 Documents clear
In Silico Antibacterial Activity of Polyacetilene Derivatives Against Mycobacterium tuberculosis and In-Vitro Antioxidant Properties from Ethanol Extraction of Blackjack (Bidens pilosa L.) Firman Wicaksana; Fadila Sofi; Mohammad Rafly
Jurnal Kimia Sains dan Aplikasi Vol 27, No 5 (2024): Volume 27 Issue 5 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.5.205-215

Abstract

Blackjack (Bidens pilosa L.) has a bioactive compound, one of which is polyacetylene, which can inhibit the growth of antimicrobials in general. This study aims to conduct an in silico study to determine the antibacterial activity against Mycobacterium Tuberculosis of 20 derivatives polyacetylene; TPC was determined by Folin–Ciocalteu colorimetric method using gallic acid as standard, and various concentrations of the extract solutions were measured at 741 nm. TFC was calculated using an aluminum chloride colorimetric assay. Quercetin was used as standard, and the absorbance was measured at 426 nm. Antioxidant activity was evaluated using DPPH scavenging 517 nm and Frap Assay 596 nm. The molecular docking results showed that the compounds (5-(2-Phenylethynyl)-2-b-glucosylmethyl-thiophene, Glucopyranosyloxy-3-hydroxy-6(E)-tetradecane-8,10,12-triyne and Phenylhexa-1,3,5-triyn-1-yl acetate were most potentially anti-tuberculosis on the target protein InhA with the binding energy produced <-6.55 Kcal/mol and the lowest inhibitory cost of 1.838×10-6. The compound has amino acids similar to natural ligands and standard compounds of isoniazid. The given ADME-T predictions showed good pharmacokinetic properties and safe levels of toxicity (5-(2-Phenylethynyl)-2-b-glucosylmethyl-thiophene, Glucopyranosyloxy-3-hydroxy-6(E)-tetradecane-8,10,12-triyne in hepatotoxic and LD50. The highest antioxidant properties in blackjack are produced by FRAP assay 722.905±7.985 mMTE/gr. This proves that blackjack has antioxidant activity and is required for bioassay-guided isolation testing against Mycobacterium tuberculosis.
Pyrazine and Furan Derivative Activity Prediction on Type 2 Diabetic Mellitus: In silico Study Richa Mardianingrum; Ai Teni Siti Robi`ah; Susanti Susanti; Ruswanto Ruswanto
Jurnal Kimia Sains dan Aplikasi Vol 27, No 5 (2024): Volume 27 Issue 5 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.5.216-225

Abstract

Diabetes Mellitus (DM) is a chronic disease that occurs when the pancreas does not produce enough insulin, or the body cannot use insulin effectively. Type 2 DM treatment can be done using antidiabetic drugs, but the continuous use of synthetic drugs will cause side effects. Empirically, the people of Nias Indonesia use palm juice (Arenga pinnata Merr.) as an antidiabetic, which can reduce blood glucose levels. This study aimed to find the active compounds in palm juice that can potentially be an antidiabetic type 2 using an in silico approach. The methods used were toxicity screening, profile pharmacokinetics, drug scanning, docking, and molecular dynamics simulation. Screening, molecular docking, and molecular dynamics of 30 compounds generated from pyrazine and furan revealed that two compounds, PF 16 and PF 30, can bind to receptors and produce lower ∆G values than metformin HCl. Molecular dynamics simulation results using the MM-GBSA calculation method showed that the PF 16 compound was more selective than the 2PDY (aldose reductase) with a value of -39.23 kcal/mol, while compound PF 30 was more selective to 1Z89 (aldose reductase) with a value of -7.36 kcal/mol. It can be concluded that the level of affinity of the PF 30 compound to the 1Z89 receptor and the PF 16 compound to the 2PDY were predicted to have the potential as antidiabetic (DM type 2).
The Effect of Calcination Temperature on the Characteristics of CeO₂ Synthesized Using the Precipitation Method Zidan Alfian Bahtiar; Tri Windarti; Dwi Hudiyanti
Jurnal Kimia Sains dan Aplikasi Vol 27, No 5 (2024): Volume 27 Issue 5 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.5.226-231

Abstract

Cerium oxide (CeO2) was synthesized using the precipitation method at various calcination temperatures ranging from 500 to 700°C. Cerium(III) nitrate hexahydrate (Ce(NO)3.6H2O) was used as the precursor for cerium, while Cetyltrimethylammonium bromide (CTAB) acted as the morphology-directing agent. Characterization results indicated that pure CeO2 was obtained at all calcination temperature variations. Calcination temperature influences crystallinity, crystal size, and CeO2 crystal parameters. The crystallinity and crystal size of CeO2 increased with the rising calcination temperature, reaching values of 81.1–84.5% and 15.58–23.12 nm, respectively, along with larger crystal parameters as the temperature increased (a = 5.406–5.410 Å). Surface morphology showed irregular shapes of CeO2 particles, with decreasing sizes as the calcination temperature increased, ranging from 0.2-5.6 μm at 600°C to 0.12-2.9 μm at 700°C. The Ce/O ratio on the surface increased with the rising calcination temperature, reaching a range of 0.48–0.57. CeO2 obtained from calcination at 600°C exhibited the highest fluorescence emission intensity (λ= 496 nm), indicating the least oxygen vacancies presence. Therefore, for antioxidant and catalyst applications, it is preferable to calcinate CeO2 at 700°C.
Synthesis and Characterization of Silver Nanoparticles Using Bioreductant Andong Leaf Extract (Cordyline fruticosa (L) A. Chev.) Mayang Sulistiorini; Gusrizal Gusrizal; Ajuk Sapar
Jurnal Kimia Sains dan Aplikasi Vol 27, No 5 (2024): Volume 27 Issue 5 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.5.243-249

Abstract

Silver nanoparticles are known to play a crucial role in various fields, prompting researchers to undertake synthesis and modification to obtain nanoscale particles. Silver nanoparticles were synthesized using a green synthesis-based chemical method with an extract from Cordyline fruticosa (L.) A. Chev. This study aims to determine the optimum conditions, including pH parameters, reaction time, and concentration, and assess the silver nanoparticles’ stability and characteristics. The research findings revealed that the optimal conditions for synthesizing silver nanoparticles were an extract pH of 11, a reaction time of 60 minutes, a AgNO3 concentration of 1.5 x 10-4 M, and an extract concentration of 0.008%. Characterization showed that silver nanoparticles were spherical, ranging from 5 to 20 nm and had an average hydrodynamic size distribution of 100.8 nm. In conclusion, leaf extract of Cordyline fruticosa (L.) A. Chev. can be utilized as a bioreductant and stabilizing agent, as indicated by stability test results, which showed considerable stability over a storage period of three months.
The Potency of Adenostemma platyphyllum as Antimelanogenic Agent: In-vitro and In-silico Studies Lutfia Mutmainnah; Irmanida Batubara; Auliya Ilmiawati
Jurnal Kimia Sains dan Aplikasi Vol 27, No 5 (2024): Volume 27 Issue 5 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.5.232-242

Abstract

Melanin is a crucial amino acid in determining human skin and hair pigmentation. Excessive melanin production can lead to hyperpigmentation and darkening of the skin. This study aims to assess the capability of Adenostemma platyphyllum as a tyrosinase enzyme inhibitor. It predicts its anti-melanogenic activity through molecular docking with proteins involved in the melanogenesis process. The in-vitro approach was conducted by determining the tyrosinase enzyme inhibition capacity, while the in-silico approach involved ligand binding to target proteins from melanogenesis pathways. The highest tyrosinase inhibition capacity was observed in the ethanol extract, with values of 9.74 Kojic Acid Equivalent (KAE)/g extract (L-tyrosine) and 17.91 (KAE)/g extract (L-DOPA). Molecular docking analysis showed that the binding of eriodictyol 7-O-sophoroside (ΔG = -9.7 kcal/mol) has the best energy affinity for the PKC-β protein, genistein (ΔG = -7.5 kcal/mol) for the tyrosinase-related protein-1 (TYRP1) protein, eriodictyol 7-O-sophoroside (ΔG = -10.2 kcal/mol) for the cGMP protein, vincosamide (ΔG = -7.2 kcal/mol) for the microphthalmia-associated transcription factor (MITF) protein, and dicaffeoylquinic acid (ΔG = -7.4 kcal/mol) for the β-catenin protein. Based on a comparison of in-vitro and in-silico studies, melanogenesis inhibition is more potent in the PKC-β and cGMP pathways than direct tyrosinase inhibition because they exhibit lower binding energy.
Na₂SO₃ Salt Effect on The Ionic Conductivity of Solid Polymer Electrolyte (SPE) Based on Polyvinyl Alcohol Sylvia Ayu Pradanawati; Albert Turnip; Nur Laila Hamidah; Yose Fachmi Buys
Jurnal Kimia Sains dan Aplikasi Vol 27, No 5 (2024): Volume 27 Issue 5 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.5.197-204

Abstract

This research is about solid polymer electrolyte (SPE) based on polyvinyl alcohol (PVA) synthesized using a solution casting technique by adding variations of sodium sulfite salt and glycerol as fillers to reduce the samples' bulk resistance for electrochemical energy storage application. The method used is a quantitative analysis based on the test results. X-ray Diffraction (XRD) was used to determine the crystallinity and structure of the solid polymer electrolyte material. Interactions between Na+ ions from salts in SPE were analyzed using Fourier transform infrared (FTIR). The mechanical properties of the SPE samples were analyzed using tensile testing (ultimate tensile strength). Solid polymer electrolyte (SPE) ion conductivity was analyzed using electrochemical impedance spectroscopy (EIS) with temperature variations of 25, 40, 50, 60, and 70°C. The maximum SPE ionic conductivity value is 1.05 × 10-5 S cm-1 in a PVA-Glycerol-Na2SO3 15% sample at 70°C.

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