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INDONESIA
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.
Arjuna Subject : -
Articles 796 Documents
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Biosensor based on Cellulose Acetate/Glutaraldehyde Membrane Electrodes for detection of organophosphorus pesticides Mashuni Mashuni; Fitri Handayani Hamid; M Jahiding; Andi Muhammad Naufal Khaeri
Jurnal Kimia Sains dan Aplikasi Vol 26, No 5 (2023): Volume 26 Issue 5 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.5.160-165

Abstract

In recent years, sensor applications have been critical in many fields, especially food safety and pesticides. Organophosphorus pesticides (OPPs) can be detected using a potentiometric biosensor with a membrane electrode made of a new natural material based on cellulose acetate (CA). Acetylcholinesterase was immobilized to 15% modified CA membrane electrodes using glutaraldehyde (GTA) as crosslinking agent and gold (Au) electrode. An indirect method used an acetylthiocholine chloride (ATCl) substrate to find OPPs like chlorpyrifos, profenophos, and diazinon. The working electrode was an CA/GTA membrane electrode, and the reference electrode was an Ag/AgCl electrode, whose potential value was measured with a potentiometer. The surface morphology of the biosensor membrane was investigated using scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX). It showed that the CA membrane has a smooth, porous surface and is very dense, and its structure consists of 71.27% carbon (C) and 28.73% oxygen (O) with an average diameter of 562.33 nm. A potentiometric biosensor based on AChE inhibition for the detection of OPPs showed a limit of detection (LoD) of 1×10−6 μg/L with a linearity range of 1×10−6–1.0 μg/L. The %inhibition value for the chlorpyrifos pesticide was 14.44 to 73.08%, profenophos was 11.98 to 77.98%, and diazinon was 18.58 to 83.27%. Therefore, higher inhibitor concentrations (OPPs) have a greater ability to prevent the AChE enzyme from breaking down the acetylcholine substrate. The biosensor with the CA membrane has a wide linearity range and a low detection limit. The potentiometer rapidly detects pesticide residues.
Isolation, Identification, and Antibacterial Testing of Essential Oil from Green Betel Leaf (Piper Betle L.) Using Well Diffusion Method Enny Fachriyah; Hafizdah Fadillah; Purbowatiningrum Ria Sarjono; Ismiyarto Ismiyarto
Jurnal Kimia Sains dan Aplikasi Vol 26, No 6 (2023): Volume 26 Issue 6 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.6.224-229

Abstract

Green betel leaves have been traditionally employed within communities for various medicinal purposes, owing to their rich composition. These leaves are endowed with secondary metabolites encompassing flavonoids, phenols, saponins, and essential oils. Notably, the essential oils within green betel leaves possess a spectrum of biological properties, including antioxidant, antifungal, antidiabetic, anti-inflammatory, antibacterial, antitumor, anti-Alzheimer's, and anti-carcinogenic activities. In this study, the essential oil from green betel leaf collected from Klaten, Central Java, Indonesia, was isolated using water-steam distillation. The components of this isolate were identified using GC-MS analysis. Antibacterial activity was assessed against Staphylococcus epidermidis ATCC 12228 (S. epidermidis) and Escherichia coli (E. coli) using the well-diffusion method at various concentrations (25%, 50%, 75%, 90%, and 100%). Chloramphenicol served as the positive control, while a solution of Tween 20 in distilled water used as the negative control. The essential oil derived from green betel leaves exhibited a brownish-yellow color, possessed a distinctive betel aroma, and had a concentration of 0.21% v/w, a refractive index of 1.5001, and a specific gravity of 0.961 g/mL. The GC-MS analysis revealed the presence of 44 components, with the five most abundant constituents being acetyl chavicol (20.65%), germacrene- D (11.55%), eugenol (8.94%), trans-caryophyllene (7.92%), and chavicol (5.74%). Regarding antibacterial activity, the isolate demonstrated strong activity against S. epidermidis ATCC 12228 at a concentration of 75%, yielding an inhibition zone diameter of 12.33 mm. Similarly, it exhibited strong activity against E. coli at a concentration of 90%, resulting in an inhibition zone diameter of 12.67 mm.
Synthesis and Computational Study of Bis-(1-(3-Chlorobenzoyl)-3-Phenylthiourea) Cobalt (III) as Anticancer Candidate Ruswanto Ruswanto; Nisa Uswatun Khasanah; Gatut Ari Wardani; Richa Mardianingrum
Jurnal Kimia Sains dan Aplikasi Vol 26, No 7 (2023): Volume 26 Issue 7 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.7.238-248

Abstract

Cancer is a disease characterized by cells forming abnormally so that a buildup can cause lumps. Drug compounds used for anticancer treatment by chemotherapy become a severe problem because they have dangerous side effects and can affect patient’s quality of life. This study aims to discover new drug compounds with lowered toxicity effects. This was achieved by modifying their structures through synthesis, characterization, and estimating the interactions of the synthesized compounds with specific target receptors, utilizing a docking method. The result obtained was a synthesis yield of 36.2%. The characterization of complex compounds was characterized by the presence of a maximum wavelength of 273 nm and a molecular weight of 652 g/mmol, indicating the absorption of Co-O and Co-S at respective wavenumbers of 498 cm-1 and 604 cm- 1. The docking results showed that the Bis-(1-(3-Chlorobenzoyl)-3-Phenylthiourea) Cobalt (III) complex had the best activity on human estrogen receptor alpha (hER alpha) with a binding affinity value of - 9.40 kcal/mol and an inhibition constant of 0.129 M, which was lower than the comparison compound (cisplatin) and had a better pharmacokinetic profile than cisplatin. This study shows that the Bis-(1-(3-Chlorobenzoyl)-3-Phenylthiourea) Cobalt (III) complex is predicted to have potential as an anticancer candidate.
Corrosion Inhibition Behavior of DL-Methionine and L-Tryptophan on Carbon Steel Achmad Rochliadi; Aep Patah; Claudia Claudia; Dadang Ramadhan
Jurnal Kimia Sains dan Aplikasi Vol 26, No 7 (2023): Volume 26 Issue 7 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.7.249-260

Abstract

The cost-effective, efficient, and environmentally friendly corrosion inhibitors have become increasingly significant within the oil and gas sector. Consequently, this research was conducted to evaluate the corrosion inhibition behavior of the amino acids DL-Met and L-Tryp on carbon steel in acidic (0.05 M HCl), alkaline (0.05 M NH4OH), and neutral (3% NaCl) environments. This study used Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization (PDP) to assess the performance of amino acids as corrosion inhibitors. The EIS and PDP measurements revealed that DL-Met and L-Tryp exhibited corrosion inhibition effects exclusively in acidic conditions. In this environment, DL-Met demonstrated a corrosion inhibition efficiency (η) of 49.7% at a concentration of 525 ppm, while L-Tryp reached an efficiency of 87.08% at a concentration of 25 ppm. Under the same conditions, DL-Met reduced the corrosion rate from 10 mm/year to 4.468 mm/year, and L-Tryp reduced it from 10.95 mm/year to 5.003 mm/year. However, the corrosion inhibition activity of DL-Met and L-Tryp in neutral and alkaline conditions did not yield positive results according to EIS measurements. In neutral conditions, 100 ppm DL-Met exhibited -22.46% inhibitory activity. Meanwhile, in alkaline conditions, 150 ppm DL-Met and 5 ppm L-Tryp exhibited inhibition efficiencies of -72.39% and -81.9%, respectively. This research aims to provide the oil and gas industry with a natural-based corrosion inhibitor alternative, offering a solution to corrosion-related challenges in acidic conditions.
Molecular Docking of Active Compounds of Syzygium myrtifolium Walp. Leaves on Leukotriene A4 Hydrolase Receptors as Colorectal Anticancer Daini Amanah; Rosario Trijuliamos Manalu; Munawarohthus Sholikha; Vilya Syafriana; Yasman Yasman
Jurnal Kimia Sains dan Aplikasi Vol 26, No 5 (2023): Volume 26 Issue 5 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.5.194-203

Abstract

Active compounds found in Syzygium myrtifolium Walp. leaves such as flavonoids, phenolics, and betulinic acid are known to have pharmacological activities. This research aimed to find active compounds found in Syzygium myrtifolium Walp. leaves, which have anticancer activity by inhibiting the protein leukotriene A4 hydrolase. Molecular docking methods are used to predict the activity and affinity between ligand-proteins. The research was conducted in silico on the active compound in Syzygium myrtifolium Walp. leaves, which met the five criteria of Lipinski’s rule for leukotriene A4 hydrolase with PDB code 3U9W. The software used were YASARA, MarvinSketch, and PLANTS, which can optimize ligands and bind ligand molecules to receptors. Then it was visualized using Discovery Studio Visualizer and analyzed the prediction of pharmacokinetics and toxicity. Docking results show that the four active compounds from the leaves of Syzygium myrtifolium Walp., namely bis (2-ethylhexyl) hexanedioate, 3-octadecyne, 1- octadecene, and (2E,6E)-farnesol have a lower docking score compared to bestatin; therefore, these four compounds have the potential to inhibit leukotriene A4 hydrolase receptors and can be candidates for colorectal anticancer compounds.
The Effect of Adding Pine Tar Oil and Petrosin as Tackifier Ingredients on The Quality of Liquid Rubber Compound-based Adhesives Umi Alma Anggraini; Teja Dwi Sutanto; Irfan Gustian; Morina Adfa; Evi Maryanti
Jurnal Kimia Sains dan Aplikasi Vol 26, No 7 (2023): Volume 26 Issue 7 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.7.261-267

Abstract

This research is focused on the development of adhesives through the utilization of different types of tackifiers. The primary raw materials employed comprise 60% concentrated latex, which is subsequently blended with additives that have been dispersed, including KOH as a stabilizing agent, stearic acid and ZnO as activators, BHT as an antioxidant, CaCO3 as a filler, MBTS (Mercaptobenzothiazole disulfide) and TMTD (Tetramethyl Thiuram Disulphide) as accelerators, and sulfur as a vulcanizing agent. This research explored two specific variations of tackifiers: pine tar oil and petrosin. The characterization of the adhesives encompasses an analysis of acidity (pH), viscosity, adhesive strength, functional group analysis using FTIR, thermal properties, and XRD. The research findings showed that the optimal conditions were achieved in the third variation of the adhesive, with the same ratio of pine tar oil tackifier and petrosin of 4 grams each. In this particular variation, adhesives conforming to the SNI 12- 7195-2006 standards were produced, displaying an adhesion strength of 1.506 N/mm, a viscosity of 1075 cP, and a pH level of 4.6. Furthermore, thermal testing results reveal that the adhesive created with tackifier (V3) exhibits thermal resistance up to 350°C, a glass transition temperature of 354°C, and a melting point of 378°C.
Isolation, Structure Determination, and Cytotoxic Activity of Steroid Compound from The Stem Bark of Aglaia cucullata (Meliaceae) Kindi Farabi; Desi Harneti; Nurlelasari Nurlelasari; Tri Mayanti; Rani Maharani; Unang Supratman
Jurnal Kimia Sains dan Aplikasi Vol 26, No 6 (2023): Volume 26 Issue 6 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.6.217-223

Abstract

Steroids are one of the secondary metabolite groups that are abundant in many organisms. In plants, this type of compound is called phytosterols. Phytosterols have been widely known to show many potential bioactivities such as anti-inflammatory, induced apoptosis, cytotoxic, anti-diabetic, angiogenic, and antioxidant. One of the sources of phytosterol compounds is the genus Aglaia. As the largest genus in the Meliaceae family, the genus Aglaia contains many bioactive compounds, including steroids. This research reported the isolation, structural determination, and cytotoxic activity of steroid compounds from the stem bark of Aglaia cucullata, one of the members of the Aglaia genus. Pure isolated steroid was obtained after maceration of dried stem bark with ethanol and partitioned based on difference polarity, continued by column chromatography. Spectroscopic methods, including HRMS, FTIR, 1D and 2D NMR, were used for structural determination. The compound structure identified as stigmast-5-en-3β-ol-3β-oleate was first isolated from this species. MCF-7 breast cancer cell, B16-F10 melanoma cell, and CV-1 normal fibroblast kidney cell were used to evaluate its cytotoxicity. Stigmast-5-en-3β-ol-3β-oleate displayed low cytotoxicity against those two cancer cells and a normal cell.
Synthesis and Characterization of Corn Husk (Zea Mays L.) Cellulose Using Microwave-Assisted Extraction (MAE) Nor Pana Yupa; Henny Purwaningsih; Tetty Kemala
Jurnal Kimia Sains dan Aplikasi Vol 26, No 7 (2023): Volume 26 Issue 7 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.7.268-275

Abstract

This research focuses on synthesizing cellulose from corn husks using microwave-assisted extraction (MAE), which aims to produce cellulose from corn husks through liquefaction, delignification, and bleaching processes. The total time required is only 14 minutes, thus shortening the process time. This study used three power variations: 450 W, 600 W, and 800 W. The results showed that the optimum conditions occurred at 800 W power. Hence, the higher the power caused the high cellulose content obtained, which amounted to 75.23% and decreased the lignin value to 15.78%, along with the increase in microwave power. FTIR analysis also confirmed the cellulose results obtained and indicated that the lignin groups were weakened or lost. Furthermore, morphological analysis of cellulose fibers by SEM showed that the surface of cellulose fibers was rough, oval, and irregular due to cracks caused by erosion. Then, the result of cellulose crystallinity using XRD was 45.8%. Compared to conventional methods, microwave-assisted cellulose synthesis exhibits better and more promising potential. This is because microwave radiation can be used to improve process time efficiency and achieve higher yields. Moreover, the proposed method is easier, faster, and straightforward.
The Synthesis and Characterization of Pahae Natural Zeolite-Coal Bottom Ash Adsorbent for Fe and Mn Purifier in Well Water Susilawati Susilawati; Nurul Syafina Lubis; Khatarina Meldawati Pasaribu
Jurnal Kimia Sains dan Aplikasi Vol 26, No 6 (2023): Volume 26 Issue 6 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.6.211-216

Abstract

Zeolite is a porous crystalline mineral alumina silica tetrahydrate that has an open three-dimensional framework structure that has channels and cavities filled with metal ions, while Bottom ash is also known to have high porosity and surface area. Thus, both zeolite and bottom ash can be used as adsorbents. This study aims to make an adsorbent based on Pahae natural zeolite with a mixture of bottom ash from coal as an adsorbent for iron (Fe) and manganese (Mn) metals in well water. Adsorbent made from Natural Zeolite Pahae-Coal Bottom Ash with a size of 200 mesh (74 µm) which has been chemically activated with 1 M NaOH solution, was prepared with various compositions of (100:0)%, (95:5)%, (90:10)%, (85:15)%, (80:20)%, (75:25)% respectively, then mold using a hydraulic press with a load of 6 tons of weight for 10 minutes. The mold samples were then physically activated with temperature variations of 600°C, 700°C, and 800°C for 4 hours, respectively. The addition of coal bottom ash filler is known to increase the porosity of the adsorbent with the composition of (75:25)% with an activated temperature of 800°C by 10%. The results of the AAS test showed that the adsorbent made from Natural Zeolite Pahae-Coal Bottom Ash reduced the content of Fe and Mn metals by 92.37% and 53.49% in well water, respectively.
Synthesis of Carbon Dot Nanoparticles (C-Dot) from Seeds and Seedpods of Kesumba Keling (Bixa orellana) using Hydrothermal and Solvothermal Methods Amrina Rosyada; Sri Sugiarti; Irma Herawati Suparto
Jurnal Kimia Sains dan Aplikasi Vol 26, No 6 (2023): Volume 26 Issue 6 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.6.204-210

Abstract

C-dot is a 0-dimensional nanoparticle with photoluminescence properties and can be synthesized from plants, such as the Kesumba Keling plant. Kesumba Keling contains a red pigment sourced from the bixin and norbixin dyes containing functional groups like ‒COOH and ‒COO‒. These functional groups are anticipated to enhance the luminescence intensity produced by C-dot. This research focuses on synthesizing C-dots from Kesumba Keling seeds and seedpods using hydrothermal and solvothermal methods. It also involves an analysis of how different solvents and passivation agents affect the luminescence of C-dots, along with a comparison of the resulting fluorescent colors. The highest yield, at 73.26%, was achieved when using Kesumba Keling seedpods and ethanol as the solvent without adding urea. Furthermore, C-dots synthesized using ethanol as the solvent display a stronger luminescent glow compared to those produced using double-distilled water as the solvent. Additionally, all C-dots synthesized in this study emit a blue luminescence. Characterizing C-dots using a UV-Vis spectrophotometer reveals absorption peaks at two different wavelengths: 260‒280 nm and 320‒340 nm. These absorption peak results align with C-dot characteristics, as confirmed by Fourier transform infrared spectrophotometry. When comparing the intensity of C-dots, those derived from Kesumba Keling peel using the double-distilled water solvent with the addition of urea exhibit a higher intensity (measuring at 0.99) than C-dots obtained from Kesumba Keling peel using ethanol as a solvent with added urea. The solvothermal method is deemed the most effective for C-dot synthesis, as it yields the highest luminescence intensity, accompanied by an emission wavelength shift to 491.65 nm.

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