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INDONESIA
Indonesian Journal of Fundamental and Applied Chemistry
Published by Universitas Sriwijaya
ISSN : 25409395     EISSN : 25409409     DOI : -
Core Subject : Science, Social,
Indonesian Journal of Fundamental and Applied Chemistry (IJFAC) is an international research journal and invites contributions of original research articles as well as review articles in several areas of chemistry. The journal aims to publish refereed, high-quality research papers with significant novelty and short communications in all branches of chemistry. Papers which describe novel theory and its application to practice are welcome, as are those which illustrate the transfer of techniques from other disciplines. IJFAC calls for papers that cover the following fields: Biochemistry Inorganic chemistry Physical chemistry Organic chemistry Analytical chemistry Applied Chemistry All papers are peer reviewed by at least two referees. Papers presented at conferences are peer reviewed and selected with the same standards as individually submitted papers. They therefore have the same archival value. Article should be submitted by the Online Submission Module at www.ijfac.unsri.ac.id or email to ijfac@unsri.ac.id
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Articles 80 Documents
Analyses of Non-bonding Length, Partial Atomics Charge and Electrostatic Energy from Molecular Dynamics Simulation of Phospholipase A2 – Substrate Syarif, Nirwan; Rohendi, Dedi
Indonesian Journal of Fundamental and Applied Chemistry Vol 1, No 3 (2016): October 2016
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v1.i3.72

Abstract

Abstract: This paper reports molecular dynamics simulation of phospholipase A2 (PLA2)– substrate that has been done. Non-bonding length, partial atomic charge and electrostatic energy were used to evaluation the interaction between PLA2 and substrate. The research was subjected for three types of PLA2 of different sources, i.e, homo sapien, bovinus and porcinus, by using computer files of their molecular structures. The files with code 3elo, 1bp2, dan 1y6o were downloaded from protein data bank.  Substrate structure can be found in 1y60 and was separated from its enzyme structure and docked into two other PLA2 structures for simulation purpose. Molecular dynamics simulations were done for 30000 steps with constant in number of molecules, volume and temperature (NVT). The results showed the existing of flip-flop mechanism as basic feature of PLA2 – substrate reactions. Interaction length analysis results indicated the presence of water molecules on the structures of 1bp2 and 3elo at the time of the simulation was completed. The existence of aspagine at the reaction site confirmed the theory that this amino acid is responsible for the survival of the reaction. the electrostatic energy increased substantially in the interaction after homo sapien PLA2 (3elo) and Bovinus (1bp2) with the substrate. Inverse effect took place in the PLA porcinus (1y6o).Keywords: flip flop, inflammation, in-silico, simulation Abstrak (Indonesian): Telah dilakukan penelitian tentang simulasi dinamika molekuler pada Situs Reaksi Phospholipase A2 (PLA2) dengan substratnya. Analisis panjang non-ikatan, muatan atom parsial dan energi elektrostatis digunakan untuk menilai interaksi antara PLA2 dan substratnya. Penelitian dilakukan pada tiga jenis sumber PLA2, yaitu homo sapien, bovinus dan porcinus dengan menggunakan file komputer untuk struktur molekul dengan kode 3elo, 1bp2, dan 1y6o. Pada file 1y60 terdapat struktur substrat yang dapat ditemukan secara alamiah. Kedua file lainnya tidak mengandung struktur molekul substrat. Simulasi dinamika molekul dilakukan untuk 30.000 langkah dengan konstan dalam jumlah molekul, volume dan suhu (NVT). Hasil penelitian menunjukkan keberadaan mekanisme flip-flop sebagai fitur dasar reaksi PLA2 - substrat. Hasil analisis panjang interaksi menunjukkan bahwa kehadiran molekul air pada struktur 1bp2 dan 3elo pada saat simulasi dilakukan. Keberadaan aspagine di lokasi reaksi menegaskan teori bahwa asam amino ini bertanggung jawab untuk kelangsungan hidup reaksi. energi elektrostatik meningkat secara substansial dalam interaksi setelah homo sapien PLA2 (3elo) dan Bovinus (1bp2) dengan substrat. efek terbalik terjadi di porcinus PLA (1y6o).Kata kunci: flip flop, inflamasi, peradangan, in-silico, simulasi
Water pollution evaluation as consequent of old wells oil exploration Sopeana, Sriyani; Ibrahim, Eddy; Faizal, Muhammad
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 3 (2017): October 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i3.62

Abstract

This research was aimed to investigate effect of oil spills on surface water from exploration in Dutch well.The investigation was carried out by in situ measurement of some parameters.Water sample was collected by grab sampling method and the analysis was conducted at Laboratory of Environment Badan Lingkungan Hidup dan Penelitian Pengembangan (BLHPP) Kabupaten Musi Banyuasin.The measurement result showed that some parameters did not fulfill the requirement of Standar Quality for Domestic Water Regulation according to Government Regulation No. 82 year 2001 i.e. COD and Oil&Fat content. The surface water and shallow ground water quality had some parameters that did not comply with standar quality according to regulation such as BOD, COD, DO, and oil-fat content.Calculation of pollution indeks (PI) showed that domestic water has 3.26 and was categorized into slightly polluted. At surface water in Angit River, the calculation of PI showed that upstream river was slightly polluted (3.23), while midstream was slightly polluted (3.22) and in downstream river was mildly polluted (9.60). 
Electrochemical Impedance Spectroscopy of Polyvinylalcohol Based Gel Electrolyte Syarif, Nirwan; Hidayanti, Nurlisa; Majlan, Edy Herianto; Jayanti, Monica Sari
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 1 (2017): February 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i1.16

Abstract

Research on the effect of electrolyte ammonium salt, concentration electrolyte with plasticizer to ionic and electronic conductivity of polymer gel electrolyte has been conducted with the variations of two electrolyte NH4Cl-PVA and NH4SCN-PVA at a concentration of 10, 30, 40 (wt%). The measurement of using ionic conductivity by using  impedance spectroscopy method showed that the highest value was 0.0156 Scm-1 i.e. in the  54.6% propilen carbonate with 40%  NH4Cl and PVA. The lowest value was 0.009 Scm-1 i.e. in the NH4SCN based electrolyte without propilene carbonate and electronic conductivity showed that the highest value was 0.0156 Scm-1 i.e. 40% NH4Cl-PVA and NH4SCN-PVA and the lowest value was 0.009 Scm-1, i.e. in the NH4SCN based electrolyte without propilene carbonate. Factorial analyses showed that the concentrations of electrolyte and the plasticizer affect conductivity value. FTIR (Fourier Transform Infrared) measurement showed that the  addition of propilene carbonate did not show new bond formation between electrolyte and PVA. It can be shown in absence of characteristic wave number for propilene carbonate and NH4+ ion.Keywords: DOE, plasticizer,  propylenecarbonate, ionic, electronic, conductivity
Laboratory effluent Treatment by Using Coagulant Alum sulphate and Poly Aluminium Chloride (PAC) Raimon, Raimon; Said, Muhammad
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 2 (2017): June 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i2.47

Abstract

It has been investigated of the laboratory effluent treatment using coagulant Alum sulphate (AS) and Poly Aluminum Chloride (PAC). This research purposes to get the best doses of coagulant in waste water treatment. Parameter focuses are Total Dissolved Solid (TDS), Fe, Mn, Cr, and Ammoniac (NH3). The result shows the Alum sulphate was more effective. The effectiveness of pollutant decrease is 58,80% of TDS, 99,14% of Fe, 98% of Cr, 77,24% of Mn, and 23,18% of Ammoniac, respectively.Keywords: Laboratory wastewater, Alum sulphate, Poly Aluminum Chloride, Heavy metals, Coagulation
The Seasional Trends of Dissolved Oxygen and pH in Sugihan River, South Sumatra, Indonesia Saleh, Noormaisyah; Mohadi, Risfidian; Dwi Saputra, Agus
Indonesian Journal of Fundamental and Applied Chemistry Vol 1, No 3 (2016): October 2016
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v1.i3.78

Abstract

Abstract: The concentrations of DO and pH of Sugihan Rivers from the upstream at Riding, Pangkalan Lampam, OKI to the offshore region of Sugihan Estuary were analyzed at 15 sampling points during dry and rainy seasion. All measurements of DO and pH were direct analysis at the river stream. The concentrations as the average values of DO in dry seasion was 1,97 mg / L while in rainy seasion was 2,57 mg / L, and for the pH degree was 3,63 in dry seasion and 4,04 in rainy seasion, respectively. Based on the DO and pH values, this study shown the natural forests and peat lands gave contribution to the low of pH degree. The low of DO values also influenced by the pH, because decomposition in the peatlands made higher solubility of biomass to the rivers stream and decreasing the ability of oxygen to penetration into the waterbody.Keywords: DO, pH, Sugihan river, natural forest, peatland Abstrak (Indonesian): Konsentrasi DO dan pH Sungai Sugihan dari hulu di Kuda, Pangkalan Lampam, OKI ke wilayah lepas pantai Sugihan Muara dianalisis pada 15 titik sampling selama musim kering dan hujan. Semua pengukuran DO dan pH adalah analisis langsung di aliran sungai. Konsentrasi sebagai nilai rata-rata DO di musim kering adalah 1,97 mg / L sedangkan di musim hujan adalah 2,57 mg / L, dan untuk tingkat pH adalah 3,63 di seasion kering dan 4,04 di musim hujan. Berdasarkan nilai-nilai DO dan pH, penelitian ini menunjukkan bahwa hutan alam dan lahan gambut berkontribusi pada rendahnya tingkat pH. Rendahnya nilai DO juga dipengaruhi oleh pH, karena dekomposisi di lahan gambut membuat kelarutan yang lebih tinggi dari biomassa ke aliran sungai dan penurunan kemampuan oksigen untuk penetrasi ke aliran sungai tersebut. Kata kunci: DO, pH, Sungai Sugihan, hutan alam, lahan gambut
Air Quality Analysis of SO2, NO2 and CO in Palembang City Nofri, Shelly; Faizal, Muhammad; Mohadi, Risfidian
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 3 (2017): October 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i3.58

Abstract

Population activity which tends to centralized in certain area cause decrease in air quality due to exhaust gas from transportation vehicle. From 2011-2014, Palembang city transport growth 3-5% per year comprise of passenger transportation, buses, truck, motorcycle and special vehicle. The increase of vehicle in Palembang gave the city air pollution potential. Transportation is the main source of air pollution in big city with 70% contribution. Exhaust gas from transport activity consist of 60% CO and 15% incomplete combustion of hydrocarbon such as NOx and Sox. The aim of research is to analyzed air quality in Palembang city. Samples were taken and subject to analysis for SO2, NO2 and CO. Sample location were determined by using purposive sampling. Location was chosen by means of traffic density at least for one hour and took place at Charitas crossroads, Patal intersection, Mesjid Agung circle, Lemabang crossroad and Plaju intersection. Result of analysis showed SO2 level is at range 112-208 mg/Nm3/hour. NO2 level between 45-227 mg/Nm3/hour and CO at range 12.595-18.320 mg/Nm3/hour. All parameter of air quality obtained are below threshold value defined by government regulation (GR) on air quality No 41 year 1999.
Photoreduction of Cr(VI) Catalyzed by TiO2-Lignin Yuniar, Yuniar; Wahyuni, Endang Tri; Aprilita, Nurul Hidayat
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 1 (2017): February 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i1.22

Abstract

In order to increase  the  activity of TiO2 photocatalyst, preparation and characterization of TiO2-lignin and its activity on Cr(VI) photoreduction have been carried out. TiO2-lignin was prepared by mixing TiO2 powder with lignin powder  in water-ethanol followed by stirring for 24 h and calcination at 400°C. The crystal structure characterizations were performed by X-ray diffraction (XRD), Lignin was identified using FT-IR whereas photoreduction of Cr(VI) was conducted in a batch reactor. The effect of TiO2 content on TiO2-lignin, irradiation time, weight of photocatalyst and initial concentration of Cr(VI) were studied to obtain effectiveness of photoreduction. Activity of TiO2-lignin on the photoreduction of Cr(VI) showed higher result than TiO2. The increased of TiO2 content in TiO2-lignin result in higher Cr(VI) photoreduction and gave maximum yield at mass ratio of TiO2/lignin 2:1. The irradiation time, weight of TiO2-lignin photocatalyst and initial concentration of Cr(VI) obtained for maximum Cr(VI) photoreduction are 40 h, 50 mg and 1 mg/L respectively which reduced Cr(VI) by 81.44%. Keywords: TiO2-lignin, Cr(VI) ion, photoreduction
Hydroxyapatite Coating on Alloys CoCrMo-TiN with Sol-Gel Method Charlena, Charlena; Giat Sukaryo, Sulistioso; Zuhfria, Moch. Irgham
Indonesian Journal of Fundamental and Applied Chemistry Vol 1, No 3 (2016): October 2016
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v1.i3.55

Abstract

ABSTRACTHydroxyapatite is synthesized by precipitation-sonification using calcium from field snail shell and powder phosphorus from (NH4)2HPO4. The calcium value was measured by atomic absorption spectrophotometer was 82.82%.The temperatures were varied on 600, 800, and 1000 oC to determine the best temperature of the coating. The best temperature was used to superimpose the HAp on the CoCrMo-TiN metal alloy using the modified sol-gel method. The layer on the metal alloy was identified with x-ray diffraction (XRD) and corrosion test. The XRD result showed that most of the CoCrMo-TiN metal alloy surface was coated by HAp. Beside HAp, there were several other phases such as calcium phosphate, carbonate apatite type A and type B. The best result of the corrosion test was showed in CoCrMo-TiN metal alloy coated with HAp with the smallest corrosion rate 0.0082 mpy.Keywords: hydroxyapatite, CoCrMo-TiN, precipitation-sonification, sol-gel modified
Determination of Magnetic Mineral Crystal Structure Using X-Ray Diffraction (XRD) on Igneous Rock from Ogolowe and Bajugan Village, Toli toli District Central Sulawesi Fajrah, Musfirah Cahya; Mapesso, Alia; Kasim, Sandra
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 2 (2017): June 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i2.52

Abstract

Study of igneous rocks derived from Ogowele Village and Village Toli-Toli Bajugan has been conducted to determine the magnetic minerals contained in the igneous rocks, as well as determine the crystal system, lattice constants and field diffraction by comparison sieve 60 mesh and 80 mesh. Process characterization and analysis using X-Ray Diffraction (XRD). Characterization and analysis of the results showed that the compound was detected both rock samples Fe3O4, SiO2, Al2O3 and MnO2. Igneous rocks derived from Ogowele village is dominated by compounds SiO2 (quartz) by 52% and rocks from Bajugan village dominated by the compound Fe3O4 (magnetite) by 40%. The crystal structure is cubic and hexagonal compound to compound Fe3O4 SiO2. Fe3O4compound cubic lattice constants are a = b = c is 8.375 Å. To compound the hexagonal SiO2 ie a = b of 4.898 Å and c of 5.385 Å. Field diffraction on Fe3O4compound is (3 1 1) and the SiO2 compound that is (1 0 1).Keywords: X-Ray Diffraction, Fe3O4 Compound, SiO2 Compound, cubic, hexagonal
Synthesis of Catalyst Cobalt Impregnated on Activated Natural Zeolite, Co/ANZ Dewi, Tri Kurnia; Fanani, Zainal
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 1 (2017): February 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i1.01

Abstract

Research has been done on the synthesis of catalyst Co/Activated Natural Zeolite. The variables studied were the mass ratio of Cobalt to Zeolite and temperature of reduction during catalyst activation. The catalyst produced were analysed in their acidity and surface area. Acidity was presented in the form of ammonia and pyridine adsorption on the catalyst surface. The results showed the increasing Cobalt to Zeolite mass ratio will increase acidity of the catalyst produced. Reduction temperature during catalyst activation also gave same effect as Cobalt to Zeolite mass ratio did. Best ratio within the range of this study was Cobalt to Zeolite mass ratio of 6:20, which was found at reduction temperature of 400 C. This ratio gave catalyst acidity correspond to ammonia adsorption of 6.4615 mmol/g, and to pyridine adsorption of 2.6047 mmol/g catalyst. The best reduction temperature was 450 C at ratio of 6:20. The acidity of this catalyst was of 7.5202 mmol/g as in ammonia adsorption, and was of  3.662 mmol/g as in pyridine adsorption. Catalyst surface area of the best ratio was 32.63 m2/g, whilst catalyst surface area of the best reduction temperature was 38.95 m2/g. Keywords: catalyst, cobalt, activated natural Zeolite