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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 5 Documents
 1 
Search results for , issue "Vol 2, No 3 (2013)" : 5 Documents clear
Polymeric Switch on Lysozyme Activity: Role of Hydrophobic and Electrostatic Interactions Dr. Sumon Ganguli; Md. Bellal Hossain
The Journal of Pure and Applied Chemistry Research Vol 2, No 3 (2013)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (377.351 KB) | DOI: 10.21776/ub.jpacr.2013.002.03.148

Abstract

Enzymes have attracted potential applications in both medicine and biotechnology. In our present study, we show a strategy for switching the enzymatic activity of lysozyme by the complex formation with a cationic smart copolymer. PAMA-g-PEG graft copolymers suppressed the enzymatic activity of lysozyme without any conformational change, indicating the formation of complex and covering the active site of lysozyme by copolymers. The addition of polyanion, poly(acrylic acid) (PAAc), recovered the suppressed enzymatic activity of the lysozyme/polymer complex efficiently. These finding suggest that that hydrophobic interaction coupled with electrostatic interactions has a great role for the complexation and decomplexation of the lysozyme/polymer complex. Circular dichroism (CD) spectral analysis indicated that the conformation of the enzymes maintained largely during the course of the complexation.
A Study on Brown Seaweed Therapy ( Sargassum sp.) toward MDA Levels and Histological Improvement on Rat Foot Suffering Rheumatoid Arthritis Fauziah Fauziah; Aulanni'am Aulanni'am; Chanif Mahdi
The Journal of Pure and Applied Chemistry Research Vol 2, No 3 (2013)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1292.066 KB) | DOI: 10.21776/ub.jpacr.2013.002.03.147

Abstract

Rheumatoid arthritis (AR), an autoimun disease, is characterized by the inflammation in the joint area caused an excessive of free radicals. An excessive of free radicals in the body cause oxidative stress, that increasing levels of malondialdehyde (MDA) as an indicator of lipid peroxidation and the decreasing levels of anti-oxidants. The treated with extract of brown seaweed (Sargassum sp.) intended to find out the MDA levels in serum and the histological of the foot joints rheumatoid arthritis rats. Malondialdehyde levels are determined through a TBA test (Thio Barbituric acid), meanwhile the histological of the rat foot joints was determined by Hematoxylen-Eosin staining (HE). The results showed the brown seaweed extract therapy (Sargassum sp.) was significantly (p <0.01) reduce levels of malondialdehyde (MDA) in the serum of 21,24% and improving histological foot joints rheumatoid arthritis rats.
Chemical Potential of Benzene Fluid from Monte Carlo Simulation with Anisotropic United Atom Model Mahfuzh Huda; Siti Mariyah Ulfa; Lukman Hakim
The Journal of Pure and Applied Chemistry Research Vol 2, No 3 (2013)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (731.509 KB) | DOI: 10.21776/ub.jpacr.2013.002.03.163

Abstract

The profile of chemical potential of benzene fluid has been investigated using Anisotropic United Atom (AUA) model. A Monte Carlo simulation in canonical ensemble was done to obtain the isotherm of benzene fluid, from which the excess part of chemical potential was calculated. A surge of potential energy is observed during the simulation at high temperature which is related to the gas-liquid phase transition. The isotherm profile indicates the tendency of benzene to condensate due to the strong attractive interaction. The results show that the chemical potential of benzene rapidly deviates from its ideal gas counterpart even at low density.
Fabrication of Oxide Ceramic MgFe2O4 Using Iron Oxide Isolated from Lapindo Mud as a Raw Material Riska Yudhistia Asworo; Rachmat Triandi Tjahjanto; Akhmad Sabarudin
The Journal of Pure and Applied Chemistry Research Vol 2, No 3 (2013)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.977 KB) | DOI: 10.21776/ub.jpacr.2013.002.03.156

Abstract

The quite high content (28.8%) of iron oxide (Fe2O3) in Lapindo Sidoarjo`s mud promotes as a potential raw material for fabrication of oxide ceramics. The preeminence magnetic properties of iron oxide materials have led to be widely used for preparation of noteworthy products i.e semiconductor ceramics. However, the high band gap of iron oxide results in high resistivity, limiting its application as semiconductor ceramics. The addition of other oxides to iron oxide is able to reduce the energy gap of resulted oxide ceramics. Accordingly, in this study, MgO is added to Fe2O3 isolated from Lapindo mud for preparation of the oxide ceramic MgFe2O4. The products are characterized, which include crystal structure, crystal size and resistivity. It was found that the addition of MgO decreased the volume fraction of spinel structure formation, the average of crystal size, and the resistance value. The ratio MgO/Fe2O3 of 3:7 and a sintering temperature of 1300oC show the optimum composition for fabrication of MgFe2O4 with the volume fraction of 0.72 and the crystal size of 49.06 nm as characterized by XRD.
Application of Moringa Oleifera Seed Powder For Iron (III) Coagulation on Local Water Resources Fadillah Utami Prasetyaningtyas; Barlah Rumhayati; Masruri Masruri
The Journal of Pure and Applied Chemistry Research Vol 2, No 3 (2013)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (210.581 KB) | DOI: 10.21776/ub.jpacr.2013.002.03.159

Abstract

This research aims to know the effect of the use of powder moringa seed to coagulant mass and coagulation process, and its effectiveness to increase the quality of pure water. This research uses factorial research design and statistic test MANOVA. To analyse water quality, the researcher uses Fe parameter.  A graphic of coagulant mass and time for each parameter is used to analyse the data. Based on the research result, the uses of moringa seed as coagulant in each 300 mL mineral water gives a possitives result to the river water sample using 100 mg coagulant mass and sedimentations time for 60 minutes, well water sample using 500 mg coagulant mass and sedimentations time for 60 minutes, tap water sample using 300 mg  coagulant mass and sedimentations time for 90 minutes. The effective coagulant that increase the water quality on well water is 98,32% of moringa seed powder, on river water is 96,64%  and for tap water is 25,62%.

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