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Masruri
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Departemen Kimia, Fakultas MIPA, Universitas Brawijaya, Jl. Veteran 65145 Malang
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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 8 Documents
 1 
Search results for , issue "Vol 9, No 1 (2020): Edition January-April 2020" : 8 Documents clear
Physical Properties Investigation on Sunscreens with Colloidal Gold and Moringa oleifera Extract Ruth Febriana Kesuma; Eva Monica; Rokiy Alfanaar
The Journal of Pure and Applied Chemistry Research Vol 9, No 1 (2020): Edition January-April 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jpacr.ub.2020.009.01.464

Abstract

Botanicals were known as active ingredients in sunscreens due to their dermal protecting. Gold in colloidal form has a completely unique property for the reason that it may be used as photoaging material. The exposure of UV radiation to skin can cause erythema and skin cancer. The aim of this study was to determine the physical properties of the sunscreens made from Au/ZnO and antioxidant from Moringa oleifera extract such as the sun protection factor (SPF), pH, spreadability, and adhesion. The Moringa oleifera were extracted by maceration. Maceration with 70% ethanol of dried leaves exhibited DPPH scavenging activity (EC50 235.01 μg/mL). Diffuse reflectance UV-Vis spectra of ZnO and Au/ZnO revealed absorption at λex of 385 nm which were equivalent to a bandgap energy of 3.22 eV. Au/ZnO posed a localized state at λex of 385 (3.65 eV). The sunscreens with formulations F1, F2, F3, and F4 showed high SPF number of 20.1479, 21.0008, 22.3872, and18.4631. Kruskal-Wallis test showed significant differences between sunscreen formulations.
Analysis of Mercury Concentration on The Water and Sediment at Tiabo River, Roko, West Galela District, North Halmahera Margaretha Tabita Tuny; Kurnia Kurnia
The Journal of Pure and Applied Chemistry Research Vol 9, No 1 (2020): Edition January-April 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.01.511

Abstract

Gold mining activity at Tiabo river in the North Halmahera causes the water on the river is contaminated by mercury. The contamination mercury on the water can damage food chain and adverse consequences toward health of people, fish, and so on. The purpose of this study is to obtain the concentration of mercury contamination that was caused by gold mining activity. The water and sediment sample was obtained by purposive sampling. The characterization of concentration mercury in the water and sediment using mercury analyzer HG-300 in the wave length 253.72 nm. The result shows that mercury concentration of the water in the six and five sample point in the rainy session and the dry session respectively is <0.66 µg/L, and the mercury concentration in the sediment shows that the lower value in the upstream river was 1.2 mg/kg and the higher concentration in the middle of river was 8.94 mg/kg respectively in the rainy session. The result indicates that the contamination mercury in the moderate danger level according to the IADC/CEDA data standard.
Structure Modification of Quinine on C-9 Hydroxyl Group via Esterification Reaction Teni Ernawati; Minarti Minarti; Puspa Dewi Narrij Lotulung
The Journal of Pure and Applied Chemistry Research Vol 9, No 1 (2020): Edition January-April 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.01.505

Abstract

Concept the role played by modified quinine in the asymmetric hydroxyl group inspired studies of modified quinine as chiral organic that lead to drug discovery development. A simple and efficient method for C-9 alkylation and arylation of quinine derivatives was reported. Series quinine derivatives were synthesized through the esterification of the hydroxyl group of quinine. The reaction with various alkyl and aryl carbonyl chloride resulted in the series of ester quinine derivatives. The structure of quinine derivatives was characterized by IR, melting point, UV, 1H NMR, 13C NMR, LCMS.
Degradation and Mineralization of Pesticide Isoprocarb by Electro Fenton Process Hayet Bakhti; Najib Ben Hamida; Didier Hauchard
The Journal of Pure and Applied Chemistry Research Vol 9, No 1 (2020): Edition January-April 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.01.490

Abstract

Electro Fenton with volumic cathode consisting of granules of carbon graphite was applied to degrade the insecticide Isoprocarb in aqueous solutions. The effects of various factors including current intensity and pesticide initial concentration were investigated in order to obtain the best experimental conditions for its degradation and mineralization. Kinetic studies determined that the insecticide removal followed a pseudo first order. The absolute rate constant for the oxidation of Isoprocarb by hydroxyl radicals were determined as 3.32 × 109 L mol−1 s−1 by competitive kinetics method taking benzoic acid as reference compound. In this work, we have also studied the mineralization of aqueous solutions of this insecticide in term of total organic carbon (TOC). After 3 hours of electrolysis, and at I = 800 mA, more than 40 % of the organic carbon presented in the solution is mineralized. Various aromatic by-products, principally formed by oxidation of the pesticide, accompanied by hydroxylation of the aromatic cycle, have been identified. Thus, the oxidative opening of the aromatic ring leads to the formation of carboxylic acids and nitrate ions. The biodegradability of Isoprocarb is estimated by the measurement of its Biochemical Oxygen Demand (BOD5).Keywords: Isoprocarb, electro Fenton, mineralization, hydroxyl radicals, oxidation.
The Mechanically Extraction Process of Gambier (Uncaria gambier Roxb.) from Limapuluh Kota, West Sumatera and Its Antioxidant activity Galuh Widiyarti; Andini Sundowo; Euis Filailla; Joddy Arya Laksmono
The Journal of Pure and Applied Chemistry Research Vol 9, No 1 (2020): Edition January-April 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jpacr.ub.2020.009.01.509

Abstract

The extraction process from leaves and twigs of gambier (Uncaria gambier Roxb)plant was conducted mechanically by using traditional hydraulic press, conventional screw press, and modified twin-screw press. The leaves and twigs of gambier plant was obtained from traditional farmer in Limapuluh Kota, West Sumatera, Indonesia. The water, ash and catechin contents of the gambier extracts were analyzed based on SNI 01-3391-2000 using spectrophotometry and thermogravimetry method. Antioxidant activity analysis of the extracts was also performed by 1,1-diphenyl-2-picrylhidrazyl (DPPH) method and compared tovitamin C as a standard antioxidant. The analysis results showed that the extracts contain no ash. Meanwhile, the catechin and water contents of the extracts were approximately 50 and 13% thus the extracts were classified as quality gambier 2. Other than that, analysis result of catechin and epicatechin contents of the extracts using HPLC and compared to the reference materials showed that catechins contents of the extracts using traditional hydraulic press, conventionalscrew press, and modified twin-screw press give catechin content in about 94.296-95.030%. However, epicatechin was detected in a trace amount. The antioxidant activity of the extracts were 2.5 times stronger than reference. The IC50 value of 4.37-4.52 µg/mL and was categorized as active antioxidant.
Effect of Precursor Concentration and Annealed Substrate Temperature on the Crystal Structure, Electronic and Optical Properties of ZnO thin film Yus Rama Denny Muchtar; Teguh Firmansyah; Adhitya Trenggono; Danu Wijaya; Ganesha Antarnusa; Andri Suherman
The Journal of Pure and Applied Chemistry Research Vol 9, No 1 (2020): Edition January-April 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.01.514

Abstract

This study carried out on the effect of precursor concentration and annealed substrate temperature on the crystal structure, electronic and optical properties of ZnO thin film. An aqueous solution of Acid Nitrite was used as precursors and its concentration was varied from 0.1 M to 0.4 M. The ZnO thin film was deposited on the glass substrate by Spray Pyrolysis Deposition and annealed with different temperature from 300 oC to 600 oC. The crystal structure, electronic and optical properties were investigated by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and UV-Spectrometer. XRD result showed that all thin films have amorphous hexagonal wurtzite crystalline. Particle sizes ranging from 21.83 to 43.67 nm were calculated through Debye-Scherer Method. It showed that the concentration of the precursor had slightly impact on the particle size. Meanwhile, the increase in particle size with increasing annealed temperature is found to be gradual. The average transparent of all thin film was more than 80%. The bandgap of the ZnO thin films was estimated by Tauc Plot Relation. It showed that the bandgap values were increased with the increasing of precursor concentration due to Burstein-Moss Effect. In addition, the decrease in band gap values was found with increasing annealed temperature. Our results demonstrated that the varying precursor concentration and annealed substrate temperature can enhance the structure, electronic and the optical properties of ZnO thin films.
Synthesis and Characterization of Lithium Iron Phosphate Carbon Composite (LFP/C) using Magnetite Sand Fe3O4 Zuffa Anisa; Mochammad Zainuri
The Journal of Pure and Applied Chemistry Research Vol 9, No 1 (2020): Edition January-April 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jpacr.ub.2020.009.01.517

Abstract

Lithium Ferro Phosphate Carbon Composite (LFP/C) had been synthesized using solid-state reaction method. Magnetite sand Fe3O4 was used as Fe- source in LFP/C synthesized. Calcination temperature of the sample performed at 400, 500, and 600°C.  The phase and composition of samples determined by Rietveld analysis of X-ray diffraction (XRD) pattern. The dominant identified phase at 400°C was diphosphate LiFeP2O7, and the others phases were nasicon Li3Fe2(PO4)3 and hematite Fe2O3. As the temperature getting higher the diphosphate phase LiFeP2O7 transform to nasicon Li3Fe2(PO4)3.The chemical bonds, lattice vibration and other structural features of the sample were investigated using FTIR spectroscopy in range of 1400 – 400 cm-1. Specific vibration modes in LFP-1 to LFP-3 for each bonding were shown by the high intense in certain wavenumber.
Gas Chromatography-Mass Spectrometry Profile of Essential Oils Derived from Zingiber officinale Rosc. Rhizome Noval Dwi Wijaya; Lailatul Rohmah; Eria Anggraini; Rana Ayu Ning Tyas; Rizki Wahyu Aji Wibowo; Masruri MASRURI, Ph.D
The Journal of Pure and Applied Chemistry Research Vol 9, No 1 (2020): Edition January-April 2020
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2020.009.01.481

Abstract

White ginger which is also called Jahe Putih (Zingiber officinale) in Indonesia, is widely used in local Indonesian communities. It is a popular ingredient in beverages for stamina and also a bioactive ingredient for many traditional Indonesian food recipes. It is a popular ingredient in beverages for stamina and also a bioactive ingredient for many traditional food recipes. However, with the increase in demand for ginger related products, fake ginger formulated products are widespread in the market. This paper is disclosed the chemical profile of essential oil obtained from steam distillation of the local ginger. The results of this study can be used as a standard to detect original ginger. It was found that the chemical composition of the essential oil obtained from the white ginger contained 0.19% of a dried weight after 3 h of steam distillation. A total of 40 monoterpenoids (C10) and sesquiterpenoids (C15) secondary metabolite compounds were respectively detected in the oil.

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