Lewati ke konten utama
25,201,077 dokumen ditemukan (Menampilkan 601-620 | Halaman 31 dari 1260054)
Urutkan
# Judul Penulis Tahun Akses
Jurnal Institusi

Effect of Calcination Temperature on the Synthesis of ZrO2-Pillared Saponite to Catalytic Activity in Menthol Esterification

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 8-13
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21170http://creativecommons.org/licenses/by-nc-nd/4.0
The influence of calcination temperature on the synthesis of zirconia-pillared saponite (PILS) and on its catalytic activity in menthol esterification has been studied. Zirconia pillarization was conducted using zirconium tetraisopropoxide as a precu...
Jurnal Institusi

Modification of Three Types of Bentonite with Zirconium Oxide Chloride (ZOC) of Local Products Using Intercalation Process

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 14-19
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21171http://creativecommons.org/licenses/by-nc-nd/4.0
Three types of bentonite modified with ZOC local products of Center for Accelerator Science and Technology-National Nuclear Energy Agency using intercalation process have been done. The purpose of this research is to create new material as a catalyst...
Jurnal Institusi

Preparation of CaTiO3 Asymmetric Membranes Using Polyetherimide as Binder Polymer

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 20-24
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21172http://creativecommons.org/licenses/by-nc-nd/4.0
Asymmetric dense and thin membranes have been prepared from powders of perovskite oxide-type CaTiO3 without cracking by phase inversion method. Polyetherimide was used as a polymeric binder in the method. The resulting green membranes, composed of Ca...
Jurnal Institusi

Correlation of Cadmium Intake from Water and Biomarkers in Resident Living Around Namobintang Dumpsite

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 25-31
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21173http://creativecommons.org/licenses/by-nc-nd/4.0
Cadmium (Cd) is a toxic element ubiquitous in the environment and can cause kidneys damage. The aim of this study was to determine the concentration of Cd in wells water and urine of population that lived around Namobintang dumpsite, and to examine t...
Jurnal Institusi

A Novel Spectrophotometric Method for Determination of Chloramphenicol Based On Diazotization Reaction at Room Temperature

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 32-35
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21174http://creativecommons.org/licenses/by-nc-nd/4.0
An analytical method for determination of chloramphenicol (CAP) based on the diazotization reaction at room temperature has been developed. The CAP was reduced using zinc powder (Zn) and diazotization reaction was carried out at room temperature in t...
Jurnal Institusi

Comparative Study of Ni-Zn LHS and Mg-Al LDH Adsorbents of Navy Blue and Yellow F3G Dye

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 36-44
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21175http://creativecommons.org/licenses/by-nc-nd/4.0
Adsorption of disperse dyes from wastewater onto Ni-Zn LHS (layered hydroxide salts) and Mg-Al LDH (layered double hydroxides) has been compared in this study. Effects of initial pH solution, contact time and initial dye concentration were investigat...
Jurnal Institusi

Adsorption of Ca(II), Mg(II), Zn(II), and Cd(II) on Chitosan Membrane Blended with Rice Hull Ash Silica and Polyethylene Glycol

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 45-52
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21176http://creativecommons.org/licenses/by-nc-nd/4.0
In this research, chitosan based membrane blended with rice hull ash (RHA) silica and polyethylene glycol (PEG) has been applied as adsorbent of Ca(II), Mg(II), Zn(II) and Cd(II) in an aqueous solution. Membrane was synthesized by blending RHA silica...
Jurnal Institusi

Synthesis, Reactivity and Stability of Aryl Halide Protecting Groups towards Di-Substituted Pyridines

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 53-58
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21177http://creativecommons.org/licenses/by-nc-nd/4.0
This paper reports the synthesis and reactivity of different Benzyl derivative protecting groups. The synthesis and stability of Benzyl halides, 4-methoxybenzyl halides, 3,5-dimethoxybenzyl halides, 3,4-dimethoxybenzyl halides, 3,4,5-trimethoxybenzyl...
Jurnal Institusi

Potassium Permanganate-Catalyzed Alpha-Pinene Oxidation: Formation of Coordination Compound with Zinc(II) and Copper(II), and Growth Inhibition Activity on Staphylococcus aureus and Escherichia coli

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 59-64
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21178http://creativecommons.org/licenses/by-nc-nd/4.0
Catalytic oxidation of alpha-pinene was investigated using potassium permanganate as an oxidant. The reaction consumed catalyst following stoichiometric amount instead of the catalytic one. The keto-carboxylate compound 2 was afforded as the oxidatio...
Jurnal Institusi

Significance of Glucose Addition on Chitosan-Glycerophosphate Hydrogel Properties

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 65-71
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21179http://creativecommons.org/licenses/by-nc-nd/4.0
Chitosan-glycerophosphate hydrogel can be used as dental scaffold due to its thermosensitivity, gelation performance at body temperature, suitable acidity for body condition, biocompatibility, and ability to provide good environment for cell prolifer...
Jurnal Institusi

Development of Candidate Reference Materials of Endosulfan Sulfate and Bifenthrin in Black Tea

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 72-79
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21180http://creativecommons.org/licenses/by-nc-nd/4.0
The candidate reference materials of endosulfan sulfate and bifenthrin in black tea have been developed according to the requirements of ISO Guide 34 and 35. Preparation of candidate material includes grinding and sieving of the black tea leaves, spi...
Jurnal Institusi

Chalcone Based Colorimetric Sensor for Anions: Experimental and TD-DFT Study

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 80-86
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21181http://creativecommons.org/licenses/by-nc-nd/4.0
The interactions between sensor chalcone of 3-(4-hydroxy-3-methoxyphenyl)-1-phenyl-2-propen-1-one (1) and anions (F–, Cl–, Br–, CN–, CO32–, and SO42–) have been experimentally and TD-DFT theoretically investigated. Sensor (1) showed a nak...
Jurnal Institusi

A Rapid and Sensitive Diagnosis of Typhoid Fever Based On Nested PCR-Voltammetric DNA Biosensor Using Flagellin Gene Fragment

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 87-91
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21182http://creativecommons.org/licenses/by-nc-nd/4.0
Typhoid fever caused by Salmonella typhi is an important issue for public health in the world. Laboratory methods for rapid and sensitive diagnosis are very important for disease management. The purpose of this study was to determine the performance ...
Jurnal Institusi

Immobilization of Glucose Oxidase on Modified-Carbon-Paste-Electrodes for Microfuel Cell

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 92-97
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21183http://creativecommons.org/licenses/by-nc-nd/4.0
Glucose oxidase (GOx) is being developed for many applications such as an implantable fuel cell, due to its attractive property of operating under physiological conditions. This study reports the functional immobilization of glucose oxidase onto poly...
Jurnal Institusi

Biodiesel Production from Waste Palm Oil Catalyzed by Hierarchical ZSM-5 Supported Calcium Oxide

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 98-104
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21184http://creativecommons.org/licenses/by-nc-nd/4.0
Biodiesel production from waste palm oil catalyzed by hierarchical ZSM-5 supported calcium oxide was studied. The activity of CaO increased after supported on h-ZSM-5 resulting an increase in conversion from 93.17% to 95.40%. A maximum conversion of ...
Jurnal Institusi

Isothermal Vapor-Liquid Equilibrium of Methanol + Glycerol and 1-Propanol + Glycerol

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 111-116
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21186http://creativecommons.org/licenses/by-nc-nd/4.0
Isothermal vapor-liquid equilibrium (VLE) data for two binary mixtures of methanol + glycerol and 1-propanol + glycerol were determined at the temperature range from (313.15 to 363.15) K using a simple quasi-static ebulliometer. All systems showed th...
Jurnal Institusi

Oxidative Desulfurization of Dibenzothiophene Using Dawson Type Heteropoly Compounds/Tantalum as Catalyst

Indonesian Journal of Chemistry; Vol 16, No 1 (2016); 105-110
Universitas Gadjah Mada, 2018DOI: 10.22146/ijc.21185http://creativecommons.org/licenses/by-nc-nd/4.0
Catalyst (NH4)6[b-P2W18O62]/Ta has been synthesized by simple wet impregnation at 30-40 °C under atmospheric conditions using Dawson type polyoxometalate (NH4)6[b-P2W18O62] and tantalum. The catalyst was characterized by FTIR spectrophotometer, XRD,...
Jurnal Institusi

Retracted-Enhanced X-Ray Absorption Property of Gold-Doped Single Wall Carbon Nanotube

Indonesian Journal of Chemistry; Vol 15, No 3 (2015); 211-217
Universitas Gadjah Mada, 2015DOI: 10.22146/ijc.21187http://creativecommons.org/licenses/by-nc-nd/4.0
Enhanced X-ray absorption property of single wall carbon nanotube (SWCNT) through gold (Au) doping (Au@SWCNT) has been studied. Mass attenuation coefficient of SWCNT increased 5.2-fold after Au doping treatment. The use of ethanol in the liquid phase...
Jurnal Institusi

Synthesis and Characterization of Chitosan/Phosphotungstic Acid-Montmorillonite Modified by Silane for DMFC Membrane

Indonesian Journal of Chemistry; Vol 15, No 3 (2015); 218-225
Universitas Gadjah Mada, 2015DOI: 10.22146/ijc.21188http://creativecommons.org/licenses/by-nc-nd/4.0
Montmorillonite was functionalized by (3-glycidyloxypropyl) trimethoxy silane (GPTMS). Subsequently, chitosan (CS) membranes filled by GPTMS-modified montmorillonite particles were prepared and characterized by FTIR. The result of FTIR obtained the p...
Jurnal Institusi

Polyaniline-Invertase-Gold Nanoparticles Modified Gold Electrode for Sucrose Detection

Indonesian Journal of Chemistry; Vol 15, No 3 (2015); 226-233
Universitas Gadjah Mada, 2015DOI: 10.22146/ijc.21189http://creativecommons.org/licenses/by-nc-nd/4.0
Sucrose sensor has been made by deposited the active materials on the surface of gold electrode. The active materials, i.e. polyaniline (PANI), invertase and gold nanoparticles, were deposited step by step. Aniline polymerization were conducted elect...