21 articles in this issue
Agustin Sumartono,Winarti Andayani Lindu,Ermin K. Winarno
The degradation and decolouration of textile waste water by gamma irradiation has been studied. Textile wastewater contain a mixture of dyes that difficult to degrade using conventional method, therefore it is necessary to find another method to degrade t... see more
Yeslia Utubira,Karna Wijaya,Triyono Triyono,Eko Sugiharto
The preparation of titanium oxide-zeolite composite (TiO2-zeolite) has been done. Preparation was initiated by dispersing oligocation of titanium solution into suspension of natural zeolite. The suspension was stirred and then filtered to separate the sol... see more
Darjito Darjito,Danar Purwonugroho,Siti Nasirotun Nisa
One techniques to reduce the concentration of heavy metal Cd(II) in aqueous solution is adsorption by chitosan. To modify the surface textures and expose the active binding sites, composite biosorbent has been prepared by coating chitosan onto alumina. Th... see more
Buhani Buhani,Suharso Suharso,Zipora Sembiring
Sargassum duplicatum algae biomass is biological material which has a potency to be used as a biosorbent adsorb metal ions from industrial liquid waste, because it has effective functional group as a ligand. However, the ability of the algae biomass in ad... see more
Ermin K. Winarno,Winarti Andayani,Agustin Sumartono
The investigation of the anionic surfactant and phenol contamination in sea water of Jakarta Gulf was carried out. The sea water samples in Jakarta Gulf were collected in May 2004 at 21 stations (sampling sites). The monitoring results indicated that the ... see more
Ali Arman Lubis,Barokah Aliyanta
Preliminary study of sediment ages and accumulation rates has been carried out in Jakarta Bay using unsupported 210Pb. 210Pb occurs naturally in sediments as one of the radioisotopes in the 238U decay series. The total 210Pb activity in sediments has two ... see more
Herry Poernomo,Noor Anis Kundari
The experiment of sorption and dispersion characteristics of uranium in the zeolite-quartz mixture as candidate of raw material of backfill material in the radioactive waste repository has been performed. The objective is to know the effect of zeolite and... see more
Astuti Tri Padmaningsih,Wega Trisunaryanti,Iqmal Tahir
Study on the concentration effect of Nb2O5-ZAAcatalyst towards total conversion of biodiesel has been conducted. The natural zeolite (ZA) was activated by dipping in NH4Cl solution and was calcined using N2 atmosphere at 500 °C for 5h to produce the ZAA s... see more
Sentot Budi Rahardjo,Abu Masykur,Melin Puspitaningrum
Complex of cobalt(II) with sulfisoxazole (slfs) has been synthesized in 1 : 4 mole ratio of metal to ligands in methanol, the complex formula is [Co(slfs)3(H2O)3]SO4.nH2O. The electric conductivity of the complex in methanol correspond to 1:1 electrolyte.... see more
Cahyorini Kusumawardani,Harno Dwi Pranowo,Crys Fajar Partana,Mudasir Mudasir
In order to describe the cobalt-water interaction correctly, a new ab initio potential was developed consisting of pair interaction terms as well as three-body contributions. Within this approach, it was possible to correct for the well-known failures of ... see more
M. Farid Rahman,Elvina Dhiaul Iftitah
The synthesis of 1,3-dimethyl-6,7-dimethoxy-3,4-dihydroisoquinoline from methyleugenol with application of Ritter reaction for directly cyclization was presented. This research was carried out in 2 steps : (1) Determination of intermediate stability that ... see more
Marcellino Rudyanto,Lanny Hartanti
A research on conversion of eugenol to methyl isoeugenol via one-step reaction with microwave irradiation has been carried out. Mixtures containing eugenol, sodium or potassium carbonate as solid support, with or without sodium or potassium hydroxide as b... see more
Jumina Jumina
Alkylation of 3-aryl-4,6-dimethoxyindole 3a and 3b with methyl and ethyl a-bromoacetates afforded good yields of indol-1-ylacetates 4. Treatment of these indoles 4 with the Vilsmeier formylation reagent gave formylindoles 5 in 54-81 % yield. These formyli... see more
Tukiran Tukiran,Saidah Saidah,Suyatno Suyatno,Nurul Hidayati,Kuniyoshi Shimizu
An oleane-type triterpenoid, briononic acid was isolated from hexane extract of the stem bark of Sandoricum koetjape Merr. (Meliaceae). This structure had been established based on spectroscopic data (UV, IR, and NMR) and by comparison with spectroscopic ... see more
Sri Atun,Nurfina Aznam,Retno Arianingrum,Masatake Niwa
Two oligoresveratrol, namely balanocarpol (2) and ampelopsin H (3) had been isolated from the steam bark of Hopea odorata (Dipterocarpaceae). The structures of these compounds were elucidated based on physical and spectroscopic data (MS, 1H and 13C NMR 1D... see more
Mahmiah Mahmiah
Isolation and identification flavonoid compound from the stem bark of Indonesian plant Saccopetalum horsfieldii Benn. Annonaceae family have been done. Extraction was carried out by maseration method using methanol at room temperature, the product was the... see more
Winarto Haryadi,Sugeng Triono
The extraction of fat from snail has been carried out by Soxhlet extractor with petroleum ether solvent. Fatty product from extraction was transesterificated in BF3/methanol solvent for an hour by reflux procedure, then extracted by n-hexane to produce me... see more
Sri Handayani,Cornelia Budimarwanti
The content of omega-3 in the fish oil capsules have been determined by alkalimetrie titration method. This method has been done in three ways. Firstly, fatty acids were oxidized by KMnO4 using H2SO4 as catalyst. Secondly, propanoic acid as the result of ... see more
Neltji Herlina Ati,Puji Rahayu,Soenarto Notosoedarmo,Leenawaty Limantara
Ikat weaving is one of traditional-home industry using plant pigments as a dye which have not been known for their pigments composition. So, the research was carried out to know the composition and the content of pigments in young leaf teak, noni root, tu... see more
Leny Yuanita
The aim of the study is to find the effect of dietary fiber components content to the percentage of bound iron by dietary fiber macromolecules at acidity and length of boiling time variation. Yard long bean super green variety as dietary fiber sources. Th... see more
Lestyo Wulandari
The eficiency chromatography of HPTLC plate is better than conventional TLC plate but it more expensive. Due to the higher price of HPTLC plate compare to conventional TLC plate, the application of ";re-used"; HPTLC plate has been tested. After being used... see more