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The Journal of Pure and Applied Chemistry Research

jpacr
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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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Synthesis, Characterization and Antifungal Activity of Some Substituted 4-thiazolidinone Derivatives Hamdan Salameh Al-Ebaisat; Taher Sharif Ababne; Tareq Mousa Al Shboul; Taghreed M. Jazzazi
The Journal of Pure and Applied Chemistry Research Vol 5, No 3 (2016)
Publisher : Chemistry Department, The University of Brawijaya

A series of 4-thiazolidinone derivatives was prepared including 2- (4-phenyl)-3-(4-hydroxyphenyl)thiazolidinone-4-one (1), 2-(4-bromophenyl)-3-(4-hydroxy phenyl) thiazolidinone-4-one (2), 2-(4-chlorophenyl)-3-(4-hydroxyphenyl) thiazolidinone-4-one (3), 2-(4-methylphenyl)-3-(4-hydroxyphenyl) thiazolidinone-4-one (4), 2-(4-metoxyphenyl)-3-(4-hydroxyphenyl) thiazolidinone-4-one (5), 2-(4-nitrophenyl)-3-(4-hydroxyphenyl) thiazolidinone-4-one (6), 2,3-bis(4-hydroxyphenyl) thiazolidinone-4-one (7) and 2-(4-ethyl phenyl)-3-(4-hydroxyphenyl) thiazolidinone-4-one (8). The chemical structures of prepared compounds have been characterized by Mass, IR, 1H-NMR, and elemental analyses. The biological activity of these compounds as fungicides was tested against three commercially known fungicides (C. albicans, patient isolate C. glabrata and C. krusei). The biological activity of compound (6) was found to be comparable to that of the commercially available fungicides.

Gas Chromatographic Analysis of Medium Chain Fatty Acids in Coconut Oil Julius Pontoh
The Journal of Pure and Applied Chemistry Research Vol 5, No 3 (2016)
Publisher : Chemistry Department, The University of Brawijaya

Analysis of medium chain of fatty acids in coconut oil becomes important due to their roles in health issues. The present analysis methods for fatty acids present in food mainly focused to the overall fatty acid concentration. The analytical method for specific medium chain fatty acids is not so much be given attention. This research is focused to the analytical methods for these particular fatty acids in coconut oil. Several analytical methods were compared including acid catalyzed, basic catalyzed and acid boron trifluoride catalyzed derivatization. The response of each fatty acid toward the derivatization methods are different. Formation of the fatty acid methyl ester from caprylic and capric was low for acid catalyzed method compared to basic catalyzed method and acid boron trifluoride catalyzed methods. This finding shows that the kinetics of the esterification among the fatty acids are not the same. The analysis of all fatty acids in coconut oil is better using basic catalyzed than the other methods.

Electric Charge Characteristics of Biofilms Formed on Various Surfaces Andi Kurniawan; Yasuaki Fukuda
The Journal of Pure and Applied Chemistry Research Vol 5, No 2 (2016)
Publisher : Chemistry Department, The University of Brawijaya

Biofilm is predominant habitats of microbes in aquatic environments. Biofilm forms when microbes attach on surfaces and produce extracellular polymeric substances. Biofilm matrix has been showed to have high sorption capacity to accumulate various ions including nutrient ions. The main driving force of the accumulation of the ions is supposed to be an electrostatic interaction between the nutrient and the biofilm polymer. Hence, the understanding of electric charge properties of biofilm polymer is critically important to understand the accumulation process. The present study aimed to investigate the characteristics of electric charge properties of biofilm polymer from biofilms formed on various surfaces (stone, wood, glass bottle, teflon, rubber, and stainless steel). The electric charge properties of biofilm polymers were investigated by measuring the electrophoretic mobility of the biofilms in various pHs (range from pH 2 to pH 9) and titrated HCl and NaOH aqueous solution to the biofilm suspension. The results indicated that biofilm matrices seemed to have both negatively and positively charged sites as a result of ionization of functional groups existed in biofilm polymers. According to the results of this study, there is a universal characteristic of electric charge properties of biofilms regardless of the kind of substrate.

Vibrational Resonance in the Classical Morse Oscillator Driven by Narrow-Band and Wide-Band Frequency Modulated Signals S. Guruparan; B. Ravindran Durai Nayagam; Chinnathambi Veerapadran; S. Rajasekar
The Journal of Pure and Applied Chemistry Research Vol 5, No 3 (2016)
Publisher : Chemistry Department, The University of Brawijaya

The phenomenon of vibrational resonance (VR) in the classical Morse oscillator influenced by narrow band and wide band frequency modulated signals is numerically studied. Vibrational resonance is found to occur when the amplitudes f and g and frequencies ω and Ω of the signals are varied. The dynamics of the system is studied in the presence of both signals separately. Vibrational resonance and dynamics of the system are characterized using the response amplitude and bifurcation diagram.

Depth Profiling of Dark and Light Green Bacan: Construction of Material Characters Models from Elemental Analysis and Mineralogical Characterization Rizky Arief Shobirin; Abdul Malik Bahrudin
The Journal of Pure and Applied Chemistry Research Vol 5, No 3 (2016)
Publisher : Chemistry Department, The University of Brawijaya

We have demonstrated the evolutional depth profiling methods for local minerals of Bacan in order to establish the sold price and maintenance of minerals sector in Indonesia. The depth profiling methods was performed by elemental analysis and mineralogical characterisation using X-ray fluorescence (XRF) and X-ray diffraction (XRD). We refined materials parameters then constructed the materials models to describe the difference of materials characters. These results described that LG Bacan has crystals phase of Dioptase (CuSiO3), Liebenbergite (Ni2SiO4), and variant of Calderonite (Ca2CuP2O9). DG Bacan has crystals phase of Fayalite (Fe2SiO4), and variant of Ferriannite (KCaFe3Si3O12). All crystals phase in LG Bacan has growth orientation on [001] direction, and has more structured crystallite size with small range of its distribution. All phase in DG Bacan has the preferred growth so, except Fayalite crystal phase. DG Bacan less structured than LG Bacan, with wider range of crystallite size distribution, but has harder structure than LG Bacan. Quartz structure in LG Bacan was more polar than DG Bacan.

Investigation of the Electronic and pH-Sensing properties of Hydroxyl-Functionalized Imine-Linked Polymers via the UV-vis Absorption Spectra and the Density Functional Theory (DFT) Calculations Ibtesam Y. Aljaafreh; Suha S Altarawneh; Mohammed Ibrahim Alomari; Alaa M. Almaabreh; Muna M. Al Amelat
The Journal of Pure and Applied Chemistry Research Vol 6, No 1 (2017): Edition of January - April 2017
Publisher : Chemistry Department, The University of Brawijaya

In this report, a synergetic computational and experimental studies were demonstrated on examples of poly-imine polymers; P(PI-IPI) and P(PIOH-IPI) to explore the role of hydroxyl substituent on their sensing and electronic properties. The polymer P(PIOH-IPI) bearing the OH-group on the ortho-position to the imine-bond, while the structure of the polymer P(PI-IPI) reveal the imine-bond only. The sensing property of the polymers was investigated via the UV-vis absorption in different solvents, acidic and basic solutions. Both polymers have shown significant sensing behavior in the acidic medium, while unpronounced behavior was noticed in the case of the polymer P(PI-IPI) in basic medium. Upon the incorporation of the OH-group, the polymer P(PIOH-IPI) has indistinguishable sensing behavior, a similar blue-shift in the acidic and basic medium, which can be attributed to the presence and the position of OH-group. The optical band gap of the polymers was determined experimentally and theoretically from the UV-vis absorption spectra and DFT calculations in the DMSO solvent. Other factors that affect the band gap values such as the structural conformation and length of conjugation were explored theoretically. In general, as the length of the optimized chain increased, the spectrum is red-shifted and the band gap decreased, which is attributed to the possible loss of chain planarity and conjugation beyond the monomer structure. Interestingly, the UV-vis spectra of the monomer-optimized structures were in a good match with the experimental UV-vis spectra. However, the band gap difference can be attributed to the method of band gap determination.

RETRACTED ARTICLE: Study on Esterification Reaction of Starch Isolated from Cassava (Manihot Esculenta) with Acetic Acid and Isopropyl Myristate Using Ultrasonicator Amini, Helda Wika; Masruri, Masruri; Ulfa, Siti Mariyah
The Journal of Pure and Applied Chemistry Research Vol. 6 No. 2 (2017): Edition of May-August 2017
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.%y.06.02.299

This article has been retracted at the request of managing editor.REASON: One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and has not prepared and/or appeared in any other publication elsewhere. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process.Similar article has appeared inÂ http://iopscience.iop.org/article/10.1088/1757-899X/299/1/012079/pdfÂ

Estimation of Ketorolactromithamine in Phamaceutical Samples and Biofluids by The New Validated UPLC Method Mohammad Nasir Uddin; Monir Uddin; Md. Touhidul Kabir; Suman Das
The Journal of Pure and Applied Chemistry Research Vol 6, No 2 (2017): Edition of May-August 2017
Publisher : Chemistry Department, The University of Brawijaya

A new UPLC method has been described to determine ketorolac tromethamine in pharmaceutical samples and biofluids. Drug was eluted using a reversed-phase Gemini 3U, C18, 110R (150 × 4.6 mm, 3 μm) column when a mobile phase composition 90:05:05 (v/v) consisting CH3OH, CH3CN and NaH2PO4 under isocratic program.Ketorolac tromethamine was eluted at a short of time 2.02 min. Ketorolac tromethamine isolated from biofluids after liquid-phase extraction. The results were linear up to 10 µg mL-1 with the correlation coefficients greater than 0.999. The sensitivity limits, LOD and LOQ were 0.016 and 0.051 µg mL-1, respectively. The method is simple, fast and reliable with good specificity and sensitivity and will be suitable for routine analysis of ketorolac tromethamine.

Synthesis and Characterization of Polyaniline Nanoparticle by Inverse Micelle Microemulsion Method Nuraini Uswatun Chasana; Siti Mariyah Ulfa; Masruri MASRURI
The Journal of Pure and Applied Chemistry Research Vol 6, No 3 (2017): Edition of September - December 2017
Publisher : Chemistry Department, The University of Brawijaya

Polyaniline (PANI) is a conductive polymer and potential for application in the electronic device manufacturing. This paper discloses a recent strategy in synthesis polyaniline nanoparticle (NP-PANI) using inverse micelle (IM) microemulsion method, and also characterization of the provided products. The synthesis step was conducted by mixing of aniline as a polymer precursor with PEG 400, n-hexane, n-butanol, ammonium persulfate and hydrochloric acid in three different reaction times, i.e. for 2, 6, and 12 hours at 26 oC. NP-PANI was afforded as a brown powder in 2.87%, 1.97% and 2.30% yield for NP-PANI-IM-2, NP-PANI-IM-6 and NP-PANI-IM-12. The characteristic on ultra violet-visible and infrared spectra exhibited NP-PANI was formed as an emeraldine salt oligomer. Moreover, their morphology was observed through scanning electron microscopy (SEM) and showed a different range of nanoparticle size, i.e. 50-62, 68-72 and 58-62 nm for NP-PANI-IM-2, NP-PANI-IM-6 and NP-PANI-IM-12, respectively. These products open the potency application in material science.

A Simple Photometer and Chemometrics Analysis for Quality Control of Sambiloto (Andrographis paniculata) Raw Material Rudi Heryanto; Derry Permana; Aryo Tedjo; Eti Rohaeti; Mohamad Rafi; Latifah Kosim Darusman
The Journal of Pure and Applied Chemistry Research Vol 6, No 3 (2017): Edition of September - December 2017
Publisher : Chemistry Department, The University of Brawijaya

In this paper, we described the use of a light emitting diode (LED)-based photometer and chemometric analysis for quality control of king of bitter or sambiloto (Andrographis paniculata) raw material. The quality of medicinal plants is determined by their chemical composition. The quantities of chemical components in medicinal plants can be assessed using spectroscopic technique. We used an “in house” photometer to generate spectra of sambiloto. The spectra were analyzed by chemometric methods, i.e. principal component analysis (PCA) and partial least square discriminant analysis (PLS-DA), with the aim of herbal quality classification based on the harvesting time. From the results obtained, based on thin layer chromatography analysis, sambiloto with different collection times (1, 2, and 3 months) contained different amounts of active compounds. Evaluation of sambiloto, using its spectra and chemometric analysis has successfully differentiated its quality based on harvesting time. PCA with the first two PC’s (PC-1 = 60% and PC-2 = 35%) was able to differentiate according to the harvesting time of sambiloto. Three models were obtained by PLS-DA and could be used to predict unknown sample of sambiloto according to the harvesting time

Page 9 of 31 | Total Record : 306

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Masruri

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Jawa timur

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Home Page

OAI Link

Editorial Team

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Contact Name Masruri

Contact Email masruri@ub.ac.id

Phone +62341-575838

Journal Mail Official jpacr@ub.ac.id

Editorial Address Departemen Kimia, Fakultas MIPA, Universitas Brawijaya, Jl. Veteran 65145 Malang

Location Kota malang, Jawa timur INDONESIA

Abstract

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Contact Name
Masruri

Contact Email
masruri@ub.ac.id

Phone
+62341-575838

Journal Mail Official
jpacr@ub.ac.id

Editorial Address
Departemen Kimia, Fakultas MIPA, Universitas Brawijaya, Jl. Veteran 65145 Malang

Location
Kota malang,

Jawa timur

INDONESIA