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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 307 Documents
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Coffee Biomass Encapsulated in Calcium Alginate as Material for Lead (II) Adsorption from Aqueous Solutions Sarina Hanifah; Rusnadi Rusnadi; M. Bachri Amran
The Journal of Pure and Applied Chemistry Research Vol 10, No 1 (2021): Edition January-April 2021
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2021.010.01.577

Abstract

This work aims to study the removal of lead (II) from aqueous solutions with Ca-Alginate (CA)  and Coffee-Calcium-Alginate (CCA). The coffee biomass were successfully prepared as the material to be encapsulated in calcium alginate. The characterization of the synthesized CA and CCA was performed using fourier transform infrared and scanning electron microscopy. The method used was batch study. Various factors which affected adsorption efficiency of lead (II) ions by CA and CCA, such as pH, agitation time, and adsorbent dose were investigated for determination of optimum experimental conditions. The result showed that CA and CCA had significant effects on adsorption of lead (ІІ) ions at pH = 4, agitation time of more than 120 min, and the adsorbent dose was 0.05 gram. Moreover, the Langmuir isotherm model showed that maximum adsorption capacity (qm) was 163.66 mg/g and 176.99 mg/g respectively for CA and CCA. The Langmuir isotherm was better described the adsorption equilibrium. Both of the adsorbent fitted to pseudo second order equations. These results demonstrated that CA and CCA show great potential to remove Pb(ІІ) ions from aqueous solutions.
The Biological Function Prediction of The 10-gingerol Compound of Ginger in Inhibiting Cyclooxygenase-2 Activity Gabriella Chandrakirana Krisnamurti; Fatchiyah Fatchiyah
The Journal of Pure and Applied Chemistry Research Vol 9, No 3 (2020): Edition September-December 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.03.547

Abstract

Anti-inflammatory agents inhibit prostaglandin synthesis by blocking cyclooxygenases (COXs). The compounds extracted from ginger, 10-gingerol and 10-shogaol can inhibit inflammation but the mechanism of inhibition remains unclear. Here we used molecular docking to predict the molecular interactions between COXs and the three inhibitors, acetaminophen (CID1983), 10-gingerol (CID168115) and 10-shogaol (CID6442612). By using that acetaminophen as a gold standard, the results demonstrated that acetaminophen, 10-gingerol, and 10-shogaol could bind catalytic domain and membrane binding domain of cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2). The 10-shogaol did not show significantly different binding energy to bind to COX-1 and COX-2. The 10-gingerol posed a stronger and more specific binding to the membrane-binding domain of COX-2 than acetaminophen and 10-shogaol. The specific binding of the 10-gingerol to COX-2 could prevent the binding of the natural substrate, arachidonic acid. The results provide useful information to improving activities of anti-inflammatory.
The Impacts of Traditional Fermentation Method on the Chemical Characteristics of Arabica Coffee Beans from Bondowoso District, East Java Ika Oktavianawati; Sattya Arimurti; Suharjono Suharjono
The Journal of Pure and Applied Chemistry Research Vol 9, No 2 (2020): Edition May-August 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.02.526

Abstract

Bondowoso district is the predominant supplier of coffee beans, and also known as Republik Kopi. However, there was still insufficient data about the chemical characteristics of coffee from Bondowoso. This research has main aims to characterize the chemical characteristic of Coffea Arabica L. from Bondowoso, and determine the impact of traditional fermentation on them. Coffee beans were naturally-fermented through soaking in water for less than 12 hours. Unfermented coffee beans were used as a control. Both unfermented and fermented coffee beans were subjected to chemical analysis. Results show that total nitrogen and lipid contents of both fermented and unfermented beans decreased after fermentation into 0.19%±0.03 and 10.03%±0.14, respectively. LCMS analysis of coffee beans revealed that the majority of amino acid contents in fermented beans were higher than that found in unfermented beans, while caffeine and derivatives to be lower in fermented coffee beans than in unfermented beans. One exception for this was 7-methylxanthine, which was found only in fermented beans. Other metabolites, including procyanidines A and B, were found to decrease through fermentation. Interestingly, 3-flavanol was found only in fermented coffee beans. This research results would benefit on improving the quality of coffee through fermentation step.
The Use of Low Ammonia Concentration in the Radiochemical Purity Test of [153Sm]Sm-EDTMP by Using the Thin Layer Chromatography Method Amal Rezka Putra; Khoirunnisa Fauziah Asyikin; Robertus Dwi Hendarto; Agus Ariyanto; Enny Lestari; Sumandi Juliyanto; Ahsanal Fikri
The Journal of Pure and Applied Chemistry Research Vol 10, No 1 (2021): Edition January-April 2021
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2021.010.01.562

Abstract

Radiochemical purity testing of [153Sm]Sm-EDTMP usually uses the Thin Layer Chromatography method. The mobile phase used is a mixture of 25% ammonia and water. However, the lowest ratio of 25% ammonia in the mobile phase is unknown. Therefore, research related to the use of the lowest concentration in the radiochemical purity test of [153Sm]Sm-EDTMP is necessary. This research method includes labelling of EDTMP using Samarium-153, preparation of the mobile phase with variations in the concentration of 25% ammonia: water, radiochemical purity test and data analysis using t-test statistics. The results of this study are the concentration of 25% ammonia: water (1: 9) to (1: 200) still shows good separation with Rf of [153Sm]SmCl3 and [153Sm]Sm-EDTMP at 0.0, 1.0 respectively, whereas with a thinner concentration of ammonia indicates less optimal separation with Rf [153Sm]SmCl3 at 0.35 to 1.0. Comparison of concentrated ammonia concentrations of 1: 9 and dilute 1: 200 was performed using a statistical t-test. The results of the data analysis showed that the two methods were not significantly different, indicated by the t-value of 0.82 less than 2.78. The conclusion of this study is that the lowest concentration of 25% ammonia and water in the radiochemical purity test of [153Sm]Sm-EDTMP is 1: 200.
Effects of Refining on the Characteristics of Suri Cucumber (Cucumis melo L. var. reticulatus Naudin) Seed Oil Hartati Soetjipto; Laili Nurrohmah; Agustinus Ignatius Kristijanto
The Journal of Pure and Applied Chemistry Research Vol 9, No 3 (2020): Edition September-December 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.03.533

Abstract

The oil refining of Suri cucumber seed oil has been developed and tested. Crude oil was obtained by using soxhlet extraction in n-hexane, then was refined using chemical method by degumming and neutralization. This study aims are to determine the oil yield before and after refining, the oil’ physicochemical characteristic before and after refining and to determine the oil profile before and after refining by the Gas Chromatography-Mass Spectrometry (GCMS) method. The refining process cause the color of the oil become paler, but do not significantly affect on the water content and density. However, the process effect to decreasing of the acid value (5.547±0 mg NaOH/g oil to 0.5±0.14 mg NaOH/g oil) and the peroxide number (0.5077±0.036meq O2/g oil became 0.145 ± 0.036meq O2/g oil). Conversely, the saponification value increase (224.06±0.69mg KOH/g oil to 240.17±1.74mg KOH/g oil). GCMS analysis shows that refining process have effects on the composition of fatty acid in the oil.
Starch Based Biocomposite from Sago (Metroxylon sagu) with Nano-Chitosan reinforcement : Mechanical and Thermal Characteristics Athoillah Azadi; Sugeng Supriyadi; Heny Herawati
The Journal of Pure and Applied Chemistry Research Vol 9, No 2 (2020): Edition May-August 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.02.516

Abstract

A biocomposite system incorporating sago starch and nano-chitosan (SS/NCS) were developed by casting and solvent evaporation method. The purpose of this experiment for characterization of the film based on sago starch (SS) with a variation of the addition of nano-chitosan (0, 2, 4, 6 and 8% by weight starch) and analyze its effect on mechanical properties, thermal properties, and morphological characteristics of mixed film (SS / NCS). Possible intermolecular interactions between SS and NCS were confirmed by Fourier-transform infrared spectroscopy (FTIR) and the reduction of crystallinity in XRD. The experimental data showed that the incorporation of nano-chitosan resulted in an increase in film solubility, tensile strength and elongation at break and a decrease in Young’s modulus. Elongation at break of the (SS/NCS) films increased with increasing of nano-chitosan concentration. The water vapor permeability (WVP) of (SS/NCS) films increased with an increase of chitosan concentration and the same tendency observed for the moisture content. Based on thermogravimetric analysis (TGA), the percentage of nano-chitosan content in starch-based films can increase thermal stability.. Scanning electron microscope (SEM) shows the surface morphology and interface of NCS/SS composite films and suggests sufficient homogenization of starch and chitosan in biodegradable composite films.
Assessment of Water Quality in Kuntaur, Central River Region, The Gambia Oladele Oyelakin; Mustapha Conteh; Osaro Iyekowa; Adjivon Anthony; Mandalena Mendy; Chukwudozie Cyril Ntomchukwu
The Journal of Pure and Applied Chemistry Research Vol 9, No 3 (2020): Edition September-December 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.03.497

Abstract

The study deals with twelve water quality parameters on twenty-four sampling locations in Kuntaur. Samples were collected from the both surface water and groundwater.  Twelve parameters were: temperature, pH, conductivity, acidity, alkalinity, total dissolved solids, turbidity, iron, nitrite, nitrate, sulphate and phosphorus (orthophosphate). Nearly all the measured parameters fell within the standard reference of the various parameters. The standards were: National Environment Agency, NEA, (The Gambia), World Health Organization, WHO and European Union, EU, Standards.
NaFePO4 Cathode Prepared from The Caustic Fusion of A Mix Ilmenite-Hematite Followed by Cyclic Voltammetry for Na Insertion Fitria Rahmawati; Dwi Aman Nur Romadhona; Syulfi Faiz
The Journal of Pure and Applied Chemistry Research Vol 9, No 2 (2020): Edition May-August 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.02.527

Abstract

Research to prepare NaFePO4 cathode material from iron sand was conducted. The iron sand consists of ilmenite FeTiO3 and hematite Fe2O3. A caustic fusion method used to precipitate iron as Fe(OH)3 and it increased Fe content up to 94.71 %. Phosphate precipitation successfully produced trigonal FePO4 and monoclinic FePO4 comply with ICSD#412736 and ICSD#281079. The prepared-FePO4 was then used as a precursor for Na insertion by applying cyclic voltammetry mode within 2.0 – 4.0 V with 0.05 mVs-1 of the scan rate. It produced orthorhombic olivine NaFePO4 and a secondary phase of orthorhombic Na0.7FePO4. Impedance analysis at 20 Hz – 5 MHz found that the material provided a semicircle at 100 Hz peak point, indicating electrode-bulk interface with a resistance value of 1735W, comparable to the electrical conductivity of 5.36 x 10-6 Scm-1. Even though the conductivity value is quite lower than NaFePO4 prepared from a commercial FePO4 that has been conducted in our previous research, however the electrical conductivity still reliable for cathode.
Synthesis of Organo-Quartz from Lumajang Sea Sand Using Sodium Dodecyl Benzene Sulfonate (SDBS) Modificator for Adsorption of Fe3+ Dhimas Yudistira; Danar Purwonugroho; Tutik Setianingsih
The Journal of Pure and Applied Chemistry Research Vol 10, No 1 (2021): Edition January-April 2021
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2021.010.01.530

Abstract

This study aims to determine the effect of sea sand modification with SDBS for adsorption of Fe3+. Sea sand was treated with 0.1 M HCl solution at 25oC. Organo-quartz was prepared at SDBS concentration of below, equal, and above the CMC value by shaking the mixture for 4 hours at 100 rpm. Characterization by FTIR spectrophotometry showed a change in the spectra pattern. The activation caused increasing of -OH silanol while modifications make them decrease. Characterization with SEM showed that the morphology of the sea sand was not uniform with irregular white chunks. The EDX results showed that the dominant elements were C (13.89% ± 10.86), O (40.48% ± 6.58), Si (16.51% ± 8.13), and Fe (11.68% ± 14.38). Adsorption was carried out using Fe3+ at 50 ppm. The Fe3+ analysis was conducted by AAS. The adsorption value by activated sea sand was 58.22% ± 7.23% whereas without treatment sea sand was 70.46% ± 5.54, and the modified sea sand was 53.24% ± 4.86. The lower adsorption is probably caused by the dissolved iron oxides in sea sand during activation.
In vitro Clot Lysis Activity of Phenolic Compound Degrading Product From Lignin Sugarcane Baggase Using Ochrobactrum sp. Arie Srihardyastuti; Moh Farid Rahman; Tri Ardyati; Anna Roosdiana; Indah Prihartini
The Journal of Pure and Applied Chemistry Research Vol 9, No 3 (2020): Edition September-December 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.03.489

Abstract

Sugarcane bagasse (Saccharum officinarum L) is a readily available waste product of cane sugar processing. The content of lignocelluloses in sugarcane bagasse is approximately 52.7% cellulose, 20% hemicelluloses, and 24.2% lignin. Lignin can be degraded enzymatically by using microorganisms, such as Ochrobactrum sp. Monomer derived from lignin degradation using these bacteria in the optimum condition of sugarcane fermentation (pH 6, temperature 40 °C, for 5 days of incubation, the concentrations of starter 29%) by GC-MS yielded phenolic compounds such as 4-methyl-2, 6-di-tert-butylphenol; 2,6-di-tert-butylquinone; phenol, and p-hydroxybenzaldehide. The thrombolytic activity of these lignin monomers can be tested in-vitro by measuring the ability of clot lysis. Lignin did not have in-vitro clot lysis activity, whereas the lignin monomers in filtrat of fermented sugarcane bagasse have an in-vitro clot lysis activity, although its capacity is not as high as streptokinase.

Page 21 of 31 | Total Record : 307

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