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The Journal of Pure and Applied Chemistry Research
Published by Universitas Brawijaya
ISSN : 23024690     EISSN : 25410733     DOI : http://dx.doi.org/10.21776/ub.jpacr
Core Subject : Health, Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology Medicine & Pharmacology
The Journal of Pure and Applied Chemistry Research focuses in publishing research articles in the field of Chemistry and Applied Chemistry. The target is in exploring, investigating, and developing chemicals sources from local and/or Indonesian to increase the value. Scope of the journal is organic chemistry, analytical chemistry, inorganic chemistry, biochemistry, and physical chemistry. Included the topic also organic chemistry natural product, theoretical and computational chemistry.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 306 Documents
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Chemical Composition and Enantiomeric Distribution of Volatile Components of Vitex trifolia Essential Oil Mudianta, I Wayan; Apriani, Ni Putu; Dewi, Indah Kusuma; Ayuni, Ni Putu Sri
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 3 (2025): Edition September-December 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2025.014.003.7903

Abstract

This study addressed the need to fully characterized the chemical composition of Vitex trifolia essential oil by using both capillary non-chiral and chiral GC-MS column. Employing the same oven program, the essential oil was injected into a capillary non-chiral column (RTX5-MS) and a derivatized cyclodextrin based chiral column (Rt-βDEXse). Five major terpenes were identified from both columns including α-pinene, sabinene, eucalyptol, α-terpinyl acetate, and β-caryophyllene. Seventeen volatile components were identified from each column that can be grouped into monoterpenes, sesquiterpenes, and their oxygenated derivatives. The enantio-resolution of the oil indicated the presence of two pairs of enantiomers including (+)- and (˗)-sabinene (5.59% and 94.41%) as well as (˗)- and (+)-α-terpineol (22.35% and 77.65%). The full chromatographic characterization of the essential oil can serve as chemotaxonomic assignments for detecting adulteration and for indicating of genuineness.
Biosourced Reduced Graphene Oxide and Its Application for Methylene Blue Adsorption Rachmat, Addy; Ahadito, Bijak Riyandi; Suryani, Sri; Meiliza, Cici; Hidayati, Nurlisa; Julinar, Julinar; Said, Muhammad
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 3 (2025): Edition September-December 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2025.014.03.7926

Abstract

Graphene oxide and reduced graphene oxide have been widely studied as a biomass-sourced alternative to graphene for their various capabilities, e.g. as adsorbent. This publication reports the preparation of graphite (g), graphene oxide (GO), and reduced graphene oxide (rGO) from coconut shell (1) and sugarcane bagasse (2) using matoa leaves extract as reducing agent, characterized by XRD, FT-IR, and Raman spectroscopy. The X-ray diffractogram showed 2θ peaks between 22.8°–23.8° for g1, GO1, and rGO1, and between 23.6°–25.8° for g2, GO2, and rGO2. FT-IR spectra of both sets of GO and rGO showed common peaks of O–H (~3400 cm–1), C–H (~2900 cm–1), and C–OH (~1600 cm–1), while also some noticeable differences between the sets. Raman spectra of both rGO showed D peak (~1400 cm–1), G peak (~1700 cm–1), and weak 2D peaks (2700–3300 cm–1) with ID/IG of 0.93 and 0.91 for rGO1 and rGO2, respectively. The obtained g, GO, and rGO were used as adsorbent for methylene blue dye. The adsorption study involved variation in dye concentration, contact time, and amount of adsorbent. It was found that rGO performs best as adsorbent compared to GO and g, with maximum adsorption capacity of 22.308 μg/mg (rGO1) and 47.533 μg/mg (rGO2). Adsorbents prepared from sugarcane bagasse were found to perform better due to its easiness of carbonization compared to coconut shell.
Structural and Morphological Study of Magnesium Phosphate from Bittern by pH Treatment and Addition of Sodium Phosphate Dyah Suci, Perwitasari; Evlyansa Bunga Rizka Ananda; Dodik Hendra Saputra; Nur Aini Fauziyah
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 3 (2025): Edition September-December 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2025.014.03.7934

Abstract

This study focuses on the study of the structure and morphology of magnesium phosphate produced through the separation process of magnesium minerals from bittern waste through the precipitation method. This process involves the precipitation of magnesium phosphate (Mg₃(PO₄)₂) by varying the pH of the solution to 8.0, 8.5, 9.0, 9.5, and 10.0, and by adding Na₃PO₄ with varying concentrations of 5, 10, 15, 20, and 25 %. This chemical reaction produces magnesium phosphate precipitates were analyzed to determine their structural and morphological characteristics. The results showed that pH 9 and Na₃PO₄ concentration of 15 % are the optimal conditions for producing magnesium phosphate with the highest yield (25.1 %). Structural and morphological analysis show that magnesium phosphate exhibits an elongated shape with non-uniform size distribution, while the NaCl residue formed as a by-product had a typical cubic morphology. The presence of NaCl residue corresponds to the expected reaction mechanism, therefore, additional purification steps were needed to increase the purity of the final product. Overall, the results of this study indicate the potential for utilizing bittern as an alternative raw material for the synthesis of value-added magnesium phosphate, particularly for agriculture or industrial applications.
Study of Antioxidant Properties of Compounds from Kratom Leaves (Mitragyna speciosa) Using the Density Functional Theory (DFT) Method Arief, Ihsanul; Kurnianto, Erwan; Khairi, Syahrul
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 3 (2025): Edition September-December 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2025.014.03.7943

Abstract

At least 17 compounds in kratom leaves (Mitragyna speciosa) are responsible for several pharmacological activities, one of which is antioxidant. This study examines antioxidant activity based on thermodynamic aspects in the form of HOMO-LUMO energy values, and kinetics in the form of predictions of radical quenching mechanisms. All compounds were optimized for geometry, and thermodynamic parameters were determined in the form of energy gap values (ΔE), ionization potential (IP), electron affinity (EA), hardness (η), electronic chemical potential (µ), softness (S), and electrophilicity index (Ω). The compounds that showed the most superior potential were then predicted for their radical quenching mechanisms by determining the values of bond dissociation energy (BDE), ionization potential (IP), proton dissociation enthalpy (PDE), proton affinity (PA), and electron transfer enthalpy (ETE). The results of the analysis of thermodynamic properties showed that three compounds had the most potential values, namely speciociliatine, 7-hydroxy mitragynine, and mitraphylline. The study of the radical scavenging mechanism of the three compounds shows that the compounds had antioxidant activity through the hydrogen atom transfer (HAT) mechanism.
Synthesis and Characterization Composite Fe3O4/Chitosan-PVA/TiO2 for Photocatalytic Degradation of Tetracycline Denada, Laellia; Poedji Loekitowati Hariani; Addy Rachmat
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 3 (2025): Edition September-December 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2025.014.03.7945

Abstract

This research aims to synthesize tetracycline waste which pollutes the environment, can be overcome by a photocatalytic degradation process using a Fe3O4/Chitosan-PVA/TiO2 composite synthesized using the coprecipitation method. The Fe3O4/Chitosan-PVA/TiO2 composite was characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope- Energy Dispersive Spectroscopy (SEM-EDS), Vibrating Sample Magnetometer (VSM), Ultraviolet-Visible Diffuse Reflectance Spectroscopy (UV-Vis DRS) and pHpzc. The crystallite size of 28.29 nm. The morphology of the composite shows a heterogeneous form with the constituent elements being C (7.69%), N (12.78), O (14.88%), Fe (63.33%) and Ti (1.29%). The saturation magnetization value of 64.24 emu/g is superparamagnetic with a band gap value of 1.38 eV and pHpzc at pH 6.8. The degradation process was studied by investigating the influence of several parameters, namely, solution pH, tetracycline concentration and irradiation time. The efficiency of tetracycline degradation by Fe3O4/Chitosan-PVA/TiO2 was 94.85% at pH 2, concentration of 15 mg/L and radiation time of 70 minutes. The results of Total Organic Carbon (TOC) analysis in a 15 mg/L tetracycline solution before degradation were 20.3 mg/L and after degradation were 5.59 mg/L with a percent reduction in carbon content of 72.46%.
Biocomposite of Cellulose Nanocrystals from Nypah fruticans Wurmb with Green Synthesis Silver Nanoparticles : In situ Preparation and Antimicrobial Activity Mailani Putri; Syukri Arief; Syukri; Gusliani Eka Putri
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 3 (2025): Edition September-December 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2025.014.03.7956

Abstract

Biocomposite of Cellulose Nanocrystals-Silver Nanoparticles (CNCs-AgNPs) was synthesized by in situ method using cellulose isolated from Nypa fruticans Wurmb and produced into nanomaterial scale with acid hydrolysis and silver nanoparticles (AgNPs) produced by green synthesis using Uncaria gambir Roxb leaf extract. Analysis of structure and morphology of CNCs-AgNPs biocomposite was carried out and its potential as an antimicrobial agent against Gram+ and Gram- bacteria. Characterization was carried out using UV-Vis spectrophotometer, FTIR, XRD, and TEM. The UV-Vis spectrum showed a typical Surface Plasmon Resonance (SPR) absorption peak around 420 nm which indicated the formation of AgNPs. The formed silver nanoparticles showed a Face Centered Cubic (FCC) crystal structure and were adsorbed on functional groups found on the nanocellulose surface based on XRD and FTIR analysis. The analysis results were reinforced by TEM analysis which showed that silver nanoparticles were evenly distributed on the surface of CNCs in the form of short rods with AgNPs diameters ranging from 8-10 nm and CNCs around 14 nm. Antibacterial activity showed that the CNCs-AgNPs biocomposite had the highest effectiveness against Gram+ bacteria. These results indicate the potential application of CNCs-AgNPs biocomposite as an environmentally friendly natural-based antimicrobial agent.

Page 31 of 31 | Total Record : 306

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