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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 4, No 2 (2015)" : 5 Documents clear
Synthesis and Spectral Characterization of Lanthanide Complexes Containing Bidentate Schiff Base Derived From Pyridine-2-Carbaldehyde and 2-Hydrazinylquinoline Vaishali Ramesh Rajewar; M. K. Dharmale; S. R. Pingalkar
The Journal of Pure and Applied Chemistry Research Vol 4, No 2 (2015)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1074.139 KB) | DOI: 10.21776/ub.jpacr.2015.004.02.191

Abstract

A series of new rare earth complexes of La(III) of the type [Ln(L)2(H2O)2]Cl3 where Ln= La(III), Pr(III), Nd(III), Sm(III) and Tb(III) and L=Schiff base ligand, 2-[2-(pyridin-2-ylmethylidene)hydrazinyl]quinoline (PCQH). These complexes have been characterized on the basis of elemental analysis (Ln, C, H, N, and Cl), melting point, IR, 1H-NMR and UV-Vis spectral data. X-ray powder diffraction study of two of the complex [Nd(L)2(H2O)2]Cl3 and Pr(L)2(H2O)2]Cl3 was found to be on powder diffraction with Cu-K α1 radiation (λ = 1.5406 Å) showing monoclinic crystal system . The complexes were found to be coloured solid and were soluble only in DMF and DMSO.
The Role of Sedimentation on Waters Edge and Analysis Pb and Zn Concentration in Water from Sentani Lake, Jayapura-Papua Frans Deminggus; Atikah Atikah; Chandrawati Cahyani
The Journal of Pure and Applied Chemistry Research Vol 4, No 2 (2015)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (762.461 KB) | DOI: 10.21776/ub.jpacr.2015.004.02.170

Abstract

We have conducted research on the role of sediment on the waters edge and content analysis of metal concentrations of lead (Pb), zinc (Zn) in the water of Sentani Lake in Jayapura, Papua Province. The experiment was conducted in April 2013. The study was conducted to determine the role of lake sediments on water quality, sediment characteristics and metal analysis has been analyzed in the laboratory to determine the concentration of Pb and Zn in the sediment. Metal analysis using Atomic Absorption Spectrophotometry (AAS) instrumentation. Sediment characteristics that have analysis, namely physical and chemical parameters are bulk density, density, porosity, water content, texture, pH, DO, colors and others. Sediment sampling locations are Ifale, estuary, Yahim beach and Yoboy with each location in depth of 0-5 cm, 5-10 cm and 10-15 cm vertically. The results showed that at each sampling site and every sediment depths showed highly significant influence on the metal content of Pb and Zn. In general, the deeper the sediment content of Pb and Zn showed different results. Average content of heavy metals (Pb and Zn) in sediments at each location that are Ifale at 27.37 mg/Kg and 35.04 mg/Kg, estuary of 15.37 mg/Kg and Pb is 28.01 mg/Kg, Yahim beach of 3.83 mg/Kg and 33.50 mg/Kg, while the location of Yoboy of 6.69 mg/Kg and 34.60 mg/Kg. Concentration of Pb (3.83 to 27.37 mg/Kg) and Zn (6.69 to 35.04 mg/Kg) in sediments is lower than the standard quality of heavy metals in sediments (EPA Region Va) is 40 mg/Kg for Pb and 90 mg/Kg for Zn metals, therefore concentrations of Pb and Zn in sediments at four locations of Sentani lake is still below the quality standard so that the levels of Pb and Zn in the sediment is not contaminated. The existence of Sentani lake sediments act as a reservoir heavy metal and not as a source of pollutants to the water quality in the Sentani lake.
Development of Spectrophotometry Method For Iodide Determination Based on I2-Starch Complex Formation with Hypochlorite as oxidator Qurrata Ayun; Hermin Sulistyarti; Atikah Atikah
The Journal of Pure and Applied Chemistry Research Vol 4, No 2 (2015)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (606.987 KB) | DOI: 10.21776/ub.jpacr.2015.004.02.184

Abstract

Iodine is one of the most important elements for human body. Both, the overage and the deficiency supply of iodine give negative impact for human health. In this research, a simple and inexpensive spectrophotometric method is developed is based on starch-iodine complex formation, where iodide was oxidized with hypochlorite to form iodine, which then reacted with starch to form a blue starch-iodine complex. In this research, the common analytical parameters were optimized regarding to sensitivity and selectivity. It was noted that maximum wavelength for starch-iodine complex was 618 nm, optimum time for complex formation and oxidation was 15 minutes, and optimum hypochlorite concentration was 6 ppm. Under the obtained optimum conditions, the proposed method showed linearity from 0-20 ppm iodide (r2 = 0.994), with limit detection of 0.20 ppm. Determination of iodide with this method was unaffected by Cl-, and Br-; but SCN- affected the measurement of iodide at concentration of 1 ppm. Application to synthetic and urinary samples showed that the proposed method has good agreement with the standard spectrophotometry (leuco crystal violet method), and can be used as an alternative method for iodide measurement.
Preparation and characterization of poly-(methacrylatoethyl trimethylammonium chloride-co-vinylbenzyl chloride-co-ethylene dimethacrylate) monolith Eko Malis; Aprilia Nur Tasfiyati; Elvina Dhiaul Iftitah; Setyawan Purnomo Sakti; Akhmad Sabarudin
The Journal of Pure and Applied Chemistry Research Vol 4, No 2 (2015)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (925.103 KB) | DOI: 10.21776/ub.jpacr.2015.004.02.214

Abstract

A polymer monolithic column, poly-(methacrylatoethyltrimethylammonium chloride-co-vinylbenzyl chloride-co-ethylene dimethacrylate) or poly-(MATE-co-VBC-co-EDMA) was successfully prepared in the current study by one-step thermally initiated in situ polymerization, confined in a steel tubing of 0.5 mm i.d. and 1/16” o.d. The monoliths were prepared from methacrylatoethyltrimethylammonium chloride (MATE) and vinylbenzyl chloride (VBC) as monomer and ethylene dimethacrylate (EDMA) as crosslinker using a binary porogen system of 1-propanol and 1,4-butanediol. The inner wall of steel tubing was pretreated with 3-methacryloxypropyl-trimethoxysilane (MAPS). In order to obtain monolith with adequate column efficiency and low flow resistance, some parameters such as total monomer concentration (%T) and crosslinker concentration (%C) were optimized. The morphology of this monolith was assessed by scanning electron microscopy (SEM). The properties of the monolithic column, such as permeability, binding capacity, and pore size distribution were also characterized in detail. From the results of the characterization of all monolith variation, monolith with %T 30 %C 50 and %T 35 %C 50 give the best characteristic. These monoliths have high permeability, adequate molecular recognition sites (represented with binding capacity value of over 20 mg/mL), and have over 80% flow through pores in their pore structure contribute to low flow resistance. The resulted monolithic columns have promising potential for dual mode liquid chromatography. MATE may contribute for anion-exchange while VBC may responsible for reversed-phase liquid chromatography.
Methanol Extracts Potential of Mas Ngur Shells (Atactodea striata) against Protease Profile and Description of Histopathology of Jejunum Rats Exposed by Indomethacin Vivi Shofia; Celcius Waranmasalembun; Sasangka Prasetyawan; Aulanni'am Aulanni'am
The Journal of Pure and Applied Chemistry Research Vol 4, No 2 (2015)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (865.907 KB) | DOI: 10.21776/ub.jpacr.2015.004.02.218

Abstract

Inflammatory Bowel Disease (IBD) is a multi-factorial disorder caused by genetic factors, environmental and immune response. One of the causes of IBD is a side effect of non-steroidal of anti-inflammatory drugs (NSAIDs). Indomethacin is an NSAID that activates macrophages and triggers increasing of protease activity. Mas Ngur shells (Atactodea striata) contains an antioxidant that inhibits the protease activity. This research used rats (Rattus norvegicus) induced by Indomethacin and treated with methanol extract of Mas Ngur shells (A. striata) at doses of 100 and 400 mg/kg of body weight (BW). Therapy potency of the Mas Ngur shells methanol extracts were identified by measuring protease activity and observed the Jejenum histopathology. Statistical analysis showed that the Mas Ngur shells therapy showed significant differences (p <0.05) by decreasing of protease activity and improve jejunum histopathology of IBD induced rats

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