23 articles in this issue
Tutik Dwi Wahyuningsih
ß-Carboline and its derivatives are significant due to their pharmacological importance. The synthesis of indolo[3,2-c]quinolines as a benzo analog of ß-carboline has been carried out via an oxime ether intermediate. Reaction of 2'-glyoxylic ester with hy... see more
Titik Taufikkurohmah
Synthesis of p-methoxy-cynnamil-p-methoxy-cinnamate, (PMS)2O from ethyl-p-methoxy-cinnamate (EPMS) from dry rhizome of kaempferia galanga L as sunscreen compound have been done. Isolation of EPMS was done by percholation using ethanol 96 % and recrystalli... see more
Hanoch J Sohilait,Hardjono Sastrohamidjojo,Sabirin Matsjeh,J Stuart Grossert
Synthesis of analog L-a-metil-Dopa from eugenol has been achieved through conversion of allyl group to ketone, followed by reaction with NH3 and KCN and by hydrolisis. The addition reaction of methyleugenol with formic acid yield methyleugenyl formate (60... see more
Bambang Purwono,Estiana R. P. Daruningsih
The nucleophilic substitution reaction to quaternary Mannich base from vanillin has been investigated. Mannich reaction to vanillin was carried out by refluxing mixture of vanillin, formaldehyde and dimethyl amine. Quaternary ammonium halide salt was obta... see more
Nunuk H Soekamto,Sjamsul A Achmad,Emilio L Ghisalberti,Euis H Hakim,Yana M Syah
Two stilbene derivatives namely lunularin and oxyresveratrol were isolated from Morus macroura Miq. (Moraceae), a rare spesies found in West Sumatera and endemic to Indonesia. The structure of all these compounds were elucidated based on physical and spec... see more
Sri Atun,Nurfina Aznama,Retno Arianingrum,Masatake Niwab
Bioactivity as antihephatotoxic directed fractionation of aceton extract from the stem bark of Hopea nigra (Dipterocarpaceae) afforded a stilbenoid trimer, namely vaticanol G (1). The structure of this compound were elucidated based on physical and spectr... see more
Freddy L Wurangian
Determination of annonacyn grade, a main insecticide compound has been done in the ethanolic and ethyl acetate extracts produced by soxhletation, and ethyl acetate extract produced by fractionation of ethanolic extract to find out the most active extract ... see more
Mitarlis Mitarlis,Prima Retno Wikandari
The research of the usefullness of furfural from bagasse for the production of ß-(2-furyl)-acrilyc acid as an alternative raw material of sunscreen compound had been done. The research was done on two stages, the first stage was synthesis of furfural from... see more
Afaf Baktir,Zumrotul Koiriyah,Ali Rohman
A thermophilic aerobe microorganism designated NP4, was isolated from the heated sugar cane. It grew on dextran, and produced a thermoactive extracellular dextranase. Screening and isolation was done by assay of dextranase activity semi quantitatively on ... see more
Arum Wijayani,Khoirul Ummah,Siti Tjahjani
Carboxy Methyl Cellulose (CMC), a compound made made of eceng gondok has been implied for its characteristic by a constructive wet system, with media such as methanol, propanol and water. Four consecutive phases involving alkalization, carboxymethylizatio... see more
Ika Daniarsari,Nurul Hidajati
The purpose of this research is to find out the influence of the extraction temperature on the rendement and pectin methoxyl contents of waterhyacinth with the applied temperatures ranged from 60, 70, 80, 90 and 100 °C.The stages of this research involve ... see more
Sri Noegrohati
Estuarine sediments are increasingly recognized as both a carrier and a possible source of heavy metals in pollution of aquatic ecosystems. The bioavailability of heavy metal from sediments, however, is a long-standing impediment of questions in determini... see more
Leny Yuanita
The aim of the study is to find iron availability and binding pattern by dietary fiber macromolecule on combination of acidity and length of boiling time, through Kads and Keff, boiling procees at the level of pH 4 and 7 with boiling time at 0 (raw), 5, 1... see more
Dosis Undjung
The purpose of this research was to produce pure Squalene using the Chromatography Column of Continuous System, so that it will be applicable in home industry. The raw material was a Shark caught from the sea water in Katingan Regency, Central Kalimantan.... see more
Iqmal Tahir,Mudasir Mudasir,Irza Yulistia,Mustofa Mustofa
Quantitative Structure-Activity Relationship (QSAR) analysis of vincadifformine analogs as an antimalarial drug has been conducted using atomic net charges (q), moment dipole (µ), LUMO (Lowest Unoccupied Molecular Orbital) and HOMO (Highest Occupied Molec... see more
Rodiansono Rodiansono,Wega Trisunaryanti
Activity test and regeneration of NiMo/active natural zeolite catalyst for hydrocracking of waste plastic fraction of polyprophylene (PP) type have been carried out. The catalysts was prepared by loading Mo followed by Ni Metals onto the natural zeolite (... see more
Choirul Amri,Dwi Siswanta,Mudasir Mudasir
A study of a liquid polymeric membrane based on polyvinylchloride-dioctylsebacate (PVC-DOS) as optical membrane for the spectrophotometric and visual determination of nitrite has been done. The method relied on the formation of a purple colored 4-(4-nitro... see more
Suharso Suharso
The surface topology of borax crystals grown at a relative supersaturation of 0.21 has been investigated using ex situ atomic force microscopy (AFM). It was found that the cleavage of borax crystals along the (010) face planes has features of the cleavage... see more
Sutarno Sutarno,Yateman Arryanto
Faujasite was hydrothermally synthesized from fly ash at 100oC in alkaline solution by reflux with 5M HCl and fusion with NaOH pretreatments. Phase transformation in the formation of faujasite was performed by variation of NaOH/fly ash weight ratios and h... see more
Hari Sutrisno,Endang Dwi Siswani,Susila Kristianingrum,Suharto Suharto
Chromium-containing silicalite-1, designed CrS-1, was synthesized by the hydrothermal method and characterized by XRD and FTIR techniques. The objectives of the research are to study the synthesis of CrS-1 and investigate the effect of crystallization tem... see more
Eko Sri Kunarti
Monitoring of hydrolysis and condensation polymerization reactions of tetramethylorthosilicate-organosiloxane have been carried out. Proton transfer from the excited state of 8-hydroxy-1,3,6-pyrenetrisulfonic acid trisodium salt (pyranine) to surrounding ... see more
Agus Kuncaka,Eko Sugiharto,Yasinta Endah Nastiti
Study on a new road of copper electroextraction to make use the solid mixture of CuFeS2 and CaCO3 as anode has been done. The aim of these research was to determine reaction kinetic and faradic efficiency of anodic copper dissolution and catodic copper pr... see more
Herry Poernomo,Noor Anis Kundari,Burhani J W
An investigation of the contribution of fly ash in the fly ash-zeolite mixture as the backfill material on the shallow land burial of radioactive waste has been done. The experiment objective is to know the effect of zeolite particle size and fly ash-zeol... see more