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Salmahaminati
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Department of ChemistryFaculty of Mathematics and Natural ScienceUniversitas Islam IndonesiaProf. Dr. H. Zanzawi Soejoeti Building, Kampus Terpadu UII Jl. Kaliurang Km.14,5 Sleman, Yogyakarta, 55584
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INDONESIA
IJCR (Indonesian Journal of Chemical Research)
Published by Universitas Islam Indonesia
ISSN : 23549610     EISSN : 26145081     DOI : 10.20885
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology
IJCR is intended to be the journal for publishing articles reporting the results of research on Chemistry field with related topics, as well as with their development through interdisciplinary and multidisciplinary approach. The types of articles published in this journal include research articles, review articles and short communication. This journal covers some topics include: Inorganic Chemistry Physical Chemistry Computational Chemistry Biochemistry Analytical Chemistry Organic Chemistry Food and Medicinal Chemistry Environmental Chemistry Material Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "VOLUME 3, ISSUE 1, 2018" : 5 Documents clear
Simple Harmonic Oscillator Model of O2 Molecule in Vacuum: A Classical Molecular Dynamics Study Salmahaminati Salmahaminati
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) VOLUME 3, ISSUE 1, 2018
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (754.593 KB) | DOI: 10.20885/ijcr.vol3.iss1.art2

Abstract

The simple harmonic oscillator model allows a basic understanding of all processes and can be used to analyse optical vibrational modes and electronic transitions in atoms, molecules and crystals, in order to derive general properties of harmonic generation to all orders. In particular, we are done to investigate single, ten, and twenty harmonic oscillator of O2 molecule using GROMACS 4.55. Time is the important factor in simulation because the best result of simulation can be obtained by increasing the number of steps and by decreasing the timesteps. Since the properties only depend on time and not on the specific microscopic model, they can also be adopted for the quantum-mechanical description by using in the classical molecular dynamics. 
Analysis of Hydrogen Sulfide (H2S) and Hydrocarbon Composition of Natural Gas from GMS (Gas Metering Station) in PT. Pupuk Sriwidjaja Palembang Rostyanesia Rostyanesia; Salmahaminati Salmahaminati; Putri Dwinanda Vidya
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) VOLUME 3, ISSUE 1, 2018
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (226.693 KB) | DOI: 10.20885/ijcr.vol3.iss1.art3

Abstract

Natural gas of GMS (Gas Metering Station) is an important component that must be analyzed routinely in PT. Fertilizer Sriwidjaja because it is the main material used in addition to Carbon dioxide (CO2) and water vapor in the manufacture of ammonia. The quality of natural gas will affect the ammonia and urea fertilizer product. The purpose of this research is to know the composition of hydrocarbons and to know the level of H2S gas in natural gas which is contained in GMS pipes. Determination of H2S levels was performed to find out the many catalysts used in the manufacture of ammonia gas.In determining the hydrocarbon composition, the first gas sample is taken using Stainless Steel Cylinder Tube. After the gas filled tube it was analyzed using GC (Gas Chromatography) and  it will know the hydrocarbon composition of GMS. As for the determination of H2S level, the gas sample taken as much as 30 L through gas spreader and inserted into erlenmeyer with 10% Cd Acetate and NaOH. Subsequently, 1% PADAS (N, N-Dimethyl-p-phenylendiamine sulphate) and FeCl3 were added. After the solution changed to blue color then analyzed using UV-Vis Spectrophotometer in 660 nm wavelength.The results obtained are nitrogen-containing natural gas and various hydrocarbon components: methane, hexane, carbon dioxide, ethane, propane, i-butane, n-butane, i-pentane, and n-pentane with H2S 2,954 ppm with the largest composition of methane 85.89%. The results have been in accordance with the standards used in the Pusri Industry which apply the provision that the natural gas used should contain methane with concentrations greater than 70% 
Pengaruh Variasi HA-TCP (Hydroxy Apatit-Tricalcium Pospat) Terhadap Biokomposit (HA:TCP)-Gelatin-CMC Sebagai Injectable Bone Subtitute (IBS) Gani Purwiandono; Hera Julita; Dita Adi Saputra
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) VOLUME 3, ISSUE 1, 2018
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (251.147 KB) | DOI: 10.20885/ijcr.vol3.iss1.art4

Abstract

The synthesis of biocomposite (HA:TCP) – Gelatine – CMC for bone filler material has been carried out. In this research, the ratio of HA and TCP was varied as follows: 70:30, 50:50 and 40:60. The decrease of HA and the increase of TCP concentration will decrease the density, increase the percentage of porosity and swelling. The best composition for the synthesis was obtained for sample B with the ratio of HA:TCP = 50:50. For sample B, the synthesized biocomposite has the density of 1.67790 gr/cm3, porosity of 78.64%, tension of 10.14 MPa, swelling ability  46.85% and the sample mass degradation percentage of 8.1 %. The composition used for the biocomposite synthesis in this research was suitable to be applied as bone filler material which needs a dense pores and high tension.
Sintesis dan Karakterisasi Komposit Alginat/Zeolit/Fe-Zn Sebagai Salah Satu Material Pupuk Penyimpan Fe dan Zn M. Arsyik Kurniawan; Indah R. Wahyuningrum; Dela Anggraini
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) VOLUME 3, ISSUE 1, 2018
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (232.69 KB) | DOI: 10.20885/ijcr.vol3.iss1.art5

Abstract

Telah dilakukan penelitian material komposit dalam bentuk penyimpanan unsur kimia berupa nutrisi/pupuk dalam bidang agricultural. Komposit ramah lingkungan, murah serta mudah didapat ini dibuat dari campuran alginat dan zeolit. Komposit disintesis dengan komposisi alginat/zeolit (1:1) dan variasi kation Fe, Zn dan Fe-Zn. Penelitian ditujukan untuk mengetahui karakter komposit alginat/zeolit yang terembankan kation Fe dan Zn didalamnya, karakterisasi dilakukan baik secara visual fisik dan molekular menggunakan analisis spetrofotometer inframerah. Hasil penelitian diperoleh berupa komposit tekstur dan warna visual yang berbeda-beda sesuai dengan jenis kation yang diemban, komposisi sampel yang dihasilkan dapat dijadikan dasar pengembangan material komposit berbasis material alginat/zeolit untuk mensuplai nutrisi bagi tanaman berupa unsur hara mikronutrien seperti Fe dan Zn.
Application of Lignin as Adsorbent for Silver (Ag) and Copper (Cu) on Electroplating Waste in Kota Gede Nurcahyo Iman Prakoso
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) VOLUME 3, ISSUE 1, 2018
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.013 KB) | DOI: 10.20885/ijcr.vol3.iss1.art1

Abstract

Lignin was a component of wood and always eliminated by chemical processing in many industries. On the other hand, oil palm bunches were the waste of palm oil industry, where that also containing high lignin.This study used lignin from residual waste of palm oil industry as biomass to adsorb silver (Ag) and copper (Cu) metal that is contained in electroplating waste by looking at lignin mass ratio, temperature and time in order to obtain optimal adsorption condition. The mass variations used were 100 mg, 200 mg, 300 mg, 400 mg, and 500 mg. While for the variation of contact time were 2 hours, 3 hours, 4 hours, 5 hours, 6 hours. For temperature variations were 30 °C, 40 °C, 50 °C,   and  60 °C.The results showed that the most optimal lignin mass ratio in adsorbing silver and copper metals was 200 mg/ 50 mL. While the most optimal contact time were 4 hours for Ag and 2 hours for Cu. For the most optimum temperature in adsorbing Ag metal at 50 °C and for Cu metal at 30 °C.

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