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I Wayan Sutapa
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INDONESIA
Chemistry Indonesian Journal of Chemical Research
  • Indonesian Journal of Chemical Research (Indones.
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Published by Universitas Pattimura
ISSN : 23385359     EISSN : 26142627     DOI : 10.30598//ijcr.2021.-irm
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemistry Engineering Environmental Science
Indo. J. Chem. Res. is a journal that regularly publishes primary articles covering all branches of chemistry and its sub-disciplines. Published articles consist of complete research, short communication, and review articles. The scope of published articles is not limited to inorganic chemistry, physical chemistry, organic chemistry, analytical chemistry, and biochemistry. Editors can invite articles review of authors that includes the latest developments in the field of interest of certain chemicals. A contribution is open to researchers from all countries.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 314 Documents
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Triterpene Compound from Ethyl Acetate Fraction of Kesambi Bark (Schleichera oleosa) and Its Activity as Anti-Bacterial Musa, Weny J.A.; Setiyandani, Kurnia Indah; Mustafid, Afif Hidayatul; Bialangi, Nurhayati; Situmeang, Boima
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-wen

Abstract

In our earlier study, we managed to find the antibacterial activity of the ethyl acetate fraction of the kesambi bark stem. In our next study, we isolated secondary metabolite compounds from the ethyl acetate fraction of the kesambi stem bark and tested the antibacterial activity of isolates against the bacteria Escherichia coli and Staphylococcus aureus. Separation is carried out by the method of column chromatography. Analysis of stain patterns and purity was performed with thin-layer chromatography (TLC). The test of antibacterial activity was carried out by the Kirby Bauer method. Characterization of pure isolates was performed with IR, 1H -NMR, 13C -NMR and DEPT 135° spectroscopy. The results of the characterization of pure isolates show that the isolated compound is a triterpenoid compound with the name IUPAC compound lup-20(29)-en-3-ol. The results of antibacterial tests showed that the compound lup-20(29)-en-3-ol has antibacterial activity against E. coli and S. aureus which is relatively moderate.
Comprehensive In silico Analysis of Antibacterial Compounds in n-Hexane Fraction from Jeruju Leaf (Acanthus ilicifolius) Wardani, Arief Kusuma; Haresmita, Perdana Priya; Alda, Mahkota; Vaira, Tischa
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-ari

Abstract

In an emergency, to identify the most promising Hesperidin, Kaempferol-3,4'-di-O-methyl ether (Ermanin); Myricetin-3-glucoside, Peonidine 3-(4’-arabinosylglucoside); Quercetin 3-(2G-rhamnosylrutinoside); and Rhamnetin 3-mannosyl-(1–2)-alloside as a lead compound from Jeruju to develop new drugs from flavonoid analog. The active compound's structure is derived from the PubChem database and improves the stability through ChemDraw v19. The Protein Data Bank website identified the protein macromolecule with PDB code 3VSL. Redocking was performed to ensure validation of 3VSL. The docking method was carried out using the IGEMDOCK software version v2.1. Also, the chimera-1.13.1 program is used to know the interaction profile. The web server pkCSM and Protox II online tool were used to determine the toxicity. 3,7,11,15-tetramethyl-2-hexadecen-1-ol is the juju leaf chemical with the most promise as an antibacterial and the one that shows the maximum binding affinity when taking into account toxicity.
Heavy Metals Analysis of Imported Scomber scombrus Sold by Cold-Rooms in Lagos State of Nigeria Ogundele, Olusola D.; Okunade, Muda B.; Oyegoke, David A.; Olulana, Caroline O.
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-Olu

Abstract

This research aimed at assessing the heavy metals concentration in imported Scomber scombrus fish samples purchased from cold rooms in Lagos, Nigeria. The samples were digested using the wet digestion method, and the concentration of Chromium (Cr), Arsenic (As), Lead (Pb), and Cobalt (Co) were determined using Atomic Absorption Spectrophotometer. Chromium (Cr) was present in twelve Scomber scombrus samples, and the level ranged from 0.004 to 0.046 mg/kg, while arsenic (As) was present in seven fish samples, with concentrations varying within 0.001 to 0.006 mg/kg. Lead (Pb) was present in eleven samples and not detected in SS5 and SS7. The concentration ranged from 0.004 to 0.062 mg/kg. Cobalt (Co) was present in seven Scomber scombrus samples, the level ranged from 0.004 to 0.046 mg/kg. However, SS3, SS10, and SS13 had lead concentrations above the maximum permissible limit (0.05 mg/kg) recommended by WHO/FAO. This study established the need for Nigerian agencies in charge of food to verify, check and ascertain the safety of imported fish before endorsing them as harmless for citizens' consumption.
Analysis of Caffeine, Tannin and Total Phenol Content of Tea Leaves from Sirah Kencong Blitar Plantation Dikatoru, Ravendha; Widayanti, Elok; Ikayanti, Retno
Indonesian Journal of Chemical Research Vol 12 No 2 (2024): Edition for September 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-rav

Abstract

Caffeine, tannins, and total phenol are chemical components of tea leaves that are beneficial for the body. Caffeine is a psychoactive substance, tannin is anti-diarrhea, and phenol compounds are antioxidants that prevent free radicals. The purpose of this research was to analyze the levels of caffeine, tannin, and total phenol of tea leaves at Sirah Kencong Blitar Plantation. Determination of the caffeine level was carried out in tea leaves powder using UV-Vis Spectrophotometry method at 273.5 nm wavelength with caffeine as a standard. The determination of tannin and total phenol levels was carried out using the ethanol extract of tea leaves. Tannin was determined by the Follin Denis method using UV-Vis spectrophotometry at 649.9 nm wavelength with tannic acid as a standard. The total phenol was determined by the Follin Ciocalteu method using UV-Vis spectrophotometry at 794 nm wavelength with gallic acid as a standard. Based on the results of the research in tea leaves from the Sirah Kencong Blitar Plantation, the caffeine content was 1.649%, tannin was 7.095%, and total phenol was 34.142%.
Synthesis of Copper Nanoparticles with Dragon Fruit (Hylocereus polyrhizus) Extract as a Bio-Reductor and Their Analysis Using a UV-Visible Spectrophotometer Qomariyah, Ani; Hakim, Ardhi Khoirul
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-ani

Abstract

Nanotechnology is a branch of science that investigates materials on a scale of 1-100 nanometers. One method that is often used to create copper nanoparticles is biosynthesis using plant extracts because it is more environmentally friendly, does not use toxic reagents and solvents and the process is simpler. Dragon fruit extract (Hylocereus polyrhizus) has potential as a reducing agent for metal compounds because it contains phenolic and carboxylic groups. This study aimed to synthesize copper nanoparticles (Cu-NPs) using a bio-reductor in the form of dragon fruit extract with various volume variations of CuSO4, pH variations, and stirring time variations. Red dragon fruit extraction was carried out by the maceration method to obtain extracts from dragon fruit, which were then used as a Cu metal-reducing agent. The resulting Cu nanoparticles were characterized using a UV-Visible Spectrophotometer. Based on the data, the highest absorbance value was obtained from the most volume of CuSO4, namely 2 mL with an absorbance peak at a wavelength of 700-750 nm. The optimum pH was obtained at pH 6 with a peak absorbance at a wavelength of 750 nm. The most effective time to obtain the absorbance peak at a wavelength of 700 nm was 15 min.
Utilization of Tamarind Seeds Extract as a Natural and Sustainable Fabric Dye Istyami, Astri Nur; Arif, Muhammad; Azzindi, Muhammad Ilham; Pratiwi, Meiti; Adisasmito, Sanggono; Damayanti, Nuning Yanti; Bustomi, Agus Tendi Ahmad; Rizkiana, Jenny
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-ast

Abstract

This research focuses on the use of tannin components in tamarind seed coats as a mordant and natural dye in cotton fabrics. Tannins were extracted from the tamarind seed coat by boiling method and then the tannin content was determined. The tannin extract was then used as a natural mordant with the addition of metallic copper sulfate (CuSO4) mordant. Tannin extract is also used as a dye on fabrics with the addition of sodium sulfate (NaSO4). The color strength of the tannins in the fabric was analyzed using a spectrophotometer from the rinse water. The results showed that the cloth that had been given the mordant had a stronger color strength than the cloth without the mordant. The use of mordant was varied at concentrations of 5, 10, 15, 20, and 25%-owf. The results of the analysis showed the most optimum tannin concentration at 15%-owf. The concentration of tannin used in the coloring process was also varied at concentrations of 5, 10, 15, 20, and 25%-owf. The results of the analysis show that the concentration of tannin used in the dye does not affect the strength of the color, but only affects the brightness of this color.
Analysis of Hydroquinone in Face Whitening Cream by UV-Vis Spectrophotometry and GC-MS Spectrometry Karnelasatri, Karnelasatri; Tahya, Candra Yulius; Adila, Mahda Uli; Hardy, Junius; Munthe, Sri Wahyu Ningsih
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-kar

Abstract

The analytical method to determine the compound content in both food and cosmetic products must be carried out carefully to ensure the validity of the analysis results. Hydroquinone has been widely found to be used as an active whitening agent in whitening cream. Technological advances have led to illegal whitening creams becoming more accessible online. This study aims to examine the hydroquinone content in the whitening samples cream purchased from e-commerce by various analytical methods, such as FeCl3 reagent, cerimetric titration, UV-Vis spectrophotometry, and GC-MS spectrometer compared to the positive control hydroquinone. The results of the hydroquinone content by cerimetric titration and UV-Vis spectrophotometry methods were calculated quantitatively. Furthermore, the result compared through statistical tests showed a consistent hydroquinone content for both methods. Contrariwise, the GC-MS method showed negative results due to differences in the extraction process and solvent solubility. Based on the result obtained, can be concluded that all samples of whitening cream did not meet the requirements of BPOM No. 23 of 2019.
Some Acetophenone Derivatives as Corrosion Inhibitors for Diesel Fuels Farzaliyeva, Aynur; Maharramov, Abel; Mamedov, Ibrahim
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-ayn

Abstract

The corrosion inhibition activities 2.4-dimethylasetophenone semicarbazone (1), 2.4-dimethylacetophenone thiosemicarbazone (2), (E)-3-(2-allyloxy)phenyl)-1-(4-hydroxy-2-methylphenyl)prop-2-en-1-one (3), (E,E)-3-(5-bromo-2-hydroxy­phe­nyl)-1-(4-hydroxy-2-methylphenyl)prop-2-en-1-one th­i­­­­o­se­­mi­car­bazone (4) and 3-hydroxy-3-(2-(2-hydroxy-5-methylphenyl)-2-oxoethyl)indolin-2-one (5) have been studied by weight loss measu­rements for mild steel-3 specimen in diesel fuel. The corrosion rates of the steel-3 are decreased with the increase of the carbazones, chalcone, indolinone con­cen­tra­ti­on, while the inhibition efficiencies are increased.
Exploration of Novel Lipase from Plant Seeds and Plant Latexes Istyami, Astri Nur; Sari, Myra Wardati; Gultom, Cristy Hagi; Prakoso, Tirto; Soerawidjaja, Tatang Hernas
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-ist

Abstract

As the demand for fatty acids increases, the enzymatic process of triglyceride hydrolysis emerges as a promising technology. Compared to microbial lipase, utilization of plant lipase is more practical due to its ease of preparation and cost-efficiency. This work aimed to verify the degree of lipolysis of several novel lipase sources from plants. Novel lipase sources investigated were seeds of kapok (Ceiba pentandra), java almond (Sterculia foetida), pongam (Milletia pinnata), sea mango (Cerbera manghas), tamanu (Calophyllum inophyllum), latex of sea mango, aveloz (Euphorbia tirucalli), and jackfruit (Artocarpus heterophyllus). Several acknowledged plant lipase sources were also compared, i.e. seeds of castor bean (Ricinus communis), physic nut (Jatropha curcas), rice bran (Oryza sativa), latex of frangipani (Plumeria rubra) and papaya (Carica papaya). Plant lipase was utilized in the hydrolysis of olive oil at room temperature. Results for seed and latex lipase were compared and technical issues were reported. Several plant lipases are remarkably active and potential to compete with microorganism lipases in industrial applications.
Synthesis of Ni(Co)/Pd Ternary Nanostructures and Their Catalytic Activity in p–Nitrophenol Reduction Processes Bazylyak, Liliya; Lyutyy, Pavlo; Vynar, Vasyl; Shepida, Mariana; Kuntyi, Orest; Kytsya, Andriy
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-baz

Abstract

Ni(Co)/Pd nanosized ternary composite materials have been synthesized by the galvanic replacement method. The structure and phase composition of the obtained Ni(Co)/Pd nanostructures were investigated using SEM, EDX and X–ray powder diffraction. The catalytic activity of the synthesized polymetallic Ni(Co)/Pd nanoparticles was studied using the example of the reduction reaction of p–nitrophenol with NaBH4 solution. It was found that in all cases the process of reduction of p–nitrophenol NaBH4 in the presence of Ni(Co)/Pd nanoparticles as a catalyst is described by the first-order kinetic equation for p–nitrophenol. The catalytic activity of the studied nanoparticles based on nickel (Ni) is varied in the following order: Ni < Ni(Co) < Ni(Pd) < Ni(Co)/Pd. It was shown that the decoration of nanoparticles based on d–elements (Ni, Co) with palladium (Pd) significantly increases of their catalytic activity. Moreover, the reduction rate of p–nitrophenol in the presence of Ni(Co)/Pd is almost three times higher, compared to effective catalytic systems known from the references, i. e., such nanosystems can be considered as promising material for the development of new types of magnetically separable catalysts for the production of aminoaromatic compounds.

Page 25 of 32 | Total Record : 314

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