10 articles in this issue
Bambang Purwono,Retno Dwi Soelistyowati,Mudasir Mudasir
Studies of the Lewis Acid (AlCl3 and BF3-methanol) to isoeugenol and isoeugenyl acetate have been conducted. Reactions were carried out by stirring of isoeugenol and isoeugenyl acetate for 4 days at room temperature.Structure analysis of the products usin... see more
Fredryk Mandey,Mikael Dominggus,Tjodi Harlim
Preliminary studies on Terong Belanda (C. betacea ) have been carried out in this investigation with an aim to examine the presence of an alkaloid in the fruit of Terong Belanda. Several protocols had been done including maceration, extraction, evaporatio... see more
Sophi Damayanti,Slamet Ibrahim,Kurnia Firman,Daryono H Tjahjono
Analytical method for the determination of paracetamol and ibuprofene mixtures has been developed by High Performance Liquid Chromatography using C-18 column and acetinitrile - phosphate buffer pH = 4.5 (75:25) containing 0.075% sodium hexanesulfunate as ... see more
Jumina Jumina,Undri Rastuti,Sabirin Matsjeh
The synthesis of 6-nitro veratryl alcohol and 6-nitro veratraldoxim from vanilin which was required as intermediates for the preparation of C-9154 antibiotic derivatives was carried out. C-9154 antibiotic is a sufficiently potent antibiotic, but so far th... see more
M Chasani,Sri Sutji S
Optimisations of incubation time of the enzymatic coconut oil extraction using Carica papaya's latex have been done. These researches were performed based on completed randomised design with varying incubation time (12, 24, 36 and 48 hours) and 3 % inocul... see more
Hery Haerudin,Wihatmoko Waskitoaji,Usman Usman
Nickel catalysts, containing 6% (w/w) of nickel, have been prepared using TiO2, Al2O3 and mixture of TiO2-Al2O3 (1:9). The catalysts were used for CO2 conversion into methane. The characteristics of catalysts were studied by determination of its specific ... see more
Nuryono Nuryono,V.V.H. Susanti,Narsito Narsito
In this research, the effect of Sangiran diatomaceous earth pre-treatment with sulfuric acid (H2SO4) and hydrochloric acid (HCl) on the kinetics of adsorption for Cr(III) in aqueous solution has been studied. The research has been carried out by mixing an... see more
Mudasir Mudasir,Iqmal Tahir,Ida Puji Astuti Maryono Putri
Quantitative structure-Activity relationship (QSAR) analysis of fungicides having 1,2,4-thiadiazoline structure based on theoretical molecular properties have been done. Calculation of the properties was conducted by semiempirical method AM1 and the activ... see more
Iqmal Tahir,Karna Wijaya,Bambang Purwono,Dinni Widianingsih
Quantitative Structure-Activity Relationship (QSAR) analysis of substituted flavone / flavonol compounds has been carried out by applying Hansch Analysis using their physicochemical properties as the predictors. The properties i.e. log P, (log P)2, core-c... see more
Harno Dwi Pranowo,Chairil Anwar
The aim of this research is to find information about the substituent effect to the structure of crown ether benzo-15-crown-5 (Bz15C5), dibenzo-16-crown-5 (DBz16C5) and dibenzo-18-crown-6 (DBz18C6), and also crown ether selectivity to coordinate a Li+ met... see more