21 articles in this issue
Adlim Adlim
Terminology of metal nanoparticles, the uniqueness properties in terms of the surface atom, the quantum dot, and the magnetism are described. The further elaboration was on the synthesis of nanoparticles. Applications of metal nanoparticles in electronic,... see more
Didik Prasetyoko,Zainab Ramli,Salasiah Endud,Halimaton Hamdan,Bogdan Sulikowski
White rice husk ash obtained from complete uncontrolled burning of rice husk contains more than 94% silica. The ash, which consists of crystalline silica of the type tridymite and a-crystobalite, was used directly as a source of silica in the synthesis of... see more
Suharso Suharso
The growth rates of borax single crystals from aqueous solutions at various flow rates in the (001) direction were measured using in situ cell method. From the growth rate data obtained, the growth rate distribution of borax crystals was investigated usin... see more
Yohan Yohan,Rifaid M. Nur,Lilik Hendrajaya,E. S. Siradj
Radiation grafting of styrene monomer onto poly(tetrafluoroethylene) (PTFE) film has been investigated. This research is emphasized on the conditioning of PTFE film. It was irradiated by ?-ray radiation at various irradiation dose from 2.5 - 12.5 kGy with... see more
Abd. Wahid Wahab
The effect of PVC (Polyvinylchloride)-Based Membrane Composition to Ion Selective Electrode (ISE)-Hg(II) Performance using Ionophore DBA218C6 (N,N'-Dibenzyl-1,4,10,13-tetraoxa-7,16-diazacyclo octadecane), Plasticizer NPOE (Nitrophenyl Octhyl Ether),... see more
Karna Wijaya,Eko Sugiharto,Is Fatimah,Iqmal Tahir,Rudatiningsih Rudatiningsih
An investigation of Alizarin S photodegradation using TiO2-zeolite and UV radiation was performed. TiO2-zeolite was prepared by dispersing oligocations of titanium into suspension of zeolite. The suspension was stirred and then filtered to separate the so... see more
Is Fatimah,Eko Sugiharto,Karna Wijaya,Iqmal Tahir,Kamalia Kamalia
The utilization of TiO2 dispersed on natural zeolite (TiO2/Zeolite) for degradation of Congo Red photocatlytically has been performed. The TiO2/Zeolite was prepared by mechanically mixing of 100 g of natural zeolite, which it has been heated at 400oC, wit... see more
Buhani Buhani,Suharso Suharso
Multiple metal ions adsorption of Cu(II), Zn(II), Mn(II) and Fe(II) on humic acid with a batch method has been carried out at pH interaction of 3, 5, and 6. Concentration of metal ions in solution before and after interaction was analyzed with Atomic Abso... see more
Sri Juari Santosa,Narsito Narsito,Aldes Lesbani
This study reports the results of the elucidation of the sorption-desorption mechanism of Zn(II) and Cd(II) on chitin through the determination of capacity, energy, and rate constant of sorption as well as the investigation of their desorption properties ... see more
Fahmiati Fahmiati,Nuryono Nuryono,Narsito Narsito
Thermodynamics study of Cd(II), Ni(II), and Mg(II) adsorption on silica gel immobilized with 3-mercapto-1,2,4-triazole (SG-SH) has been carried out. Three thermodynamic parameters namely adsorption capacity, equilibrium constant and adsorption energy were... see more
Anis Shofiyani,Gusrizal Gusrizal
Effect of pH and determination of adsorption capacity of Cu(II), Ni(II) and Pb(II) heavy metal ions on adsorbent prepared from Eichhornia crassipes (eceng gondok) biomass has been investigated. The influence of media acidity on the adsorption characterist... see more
Sri Noegrohati
In estuarine ecosystem, sediments are not only functioning as heavy metal scavenger, but also as one of potential sources for heavy metals to the ecosystem. Due the capability of aquatic organisms to accumulate heavy metals, there is possibility of heavy ... see more
Tri Joko Raharjo,Ogbuadike Eucharia,Wen-Te Chang,Robert Verpoorte
Callus of Cannabis sativa has been successfully induced from C. sativa explants and seedings. It seems that flowers are the best explant for callus induction and induction under light also give better results than induction in dark. Four cell culture line... see more
Sri Atun,Nurfina Aznam,Retno Arianingrum,Masatake Niwa
Isolation and structure elucidation of two resveratrols dimer, namely balanocarpol (1) and heimiol A (2) from stem bark of Hopea mengarawan had been done. The isolation of those compounds was carried out by chromatographic method and structure elucidation... see more
Nanik Siti Aminah,Sjamsul Arifin Achmad,Masatake Niwa,Yana Maolana Syah,Euis Holisotan Hakim
A dimer resveratrol compound named (-)-ampelopsin A was isolated from acetone extract of the stem bark of Dryobalanops oblongifolia (Dipterocarpaceae). The structure of this compound was determined on the basis of NMR spectroscopic data.
Suyatno Suyatno,Noor Cholies Zaini,Gunawan Indrayanto,Motoo Tori
Two non phenolic compounds namely a wax ester hexacosyl hexadecanoic and a steroid ?-sitosterol were isolated from the n-hexane extract of the fern Chingia sakayensis (Zeiller) Holtt's leaves. Their structures were elucidated on the basis of... see more
Suyanto Suyanto,Wahyudi Priyono Suwarso,Soleh Kosela,Hery Suwito,Pratiwi Pudjiastuti,Sri Winiati,Nurdin Saidi
The isolation of 1,3,8- trihydroxy-2(1'-pentanol)-6-methoxy anthraquinone from acetone extract of lichen thallus of Ramalina javanica Nyl. was carried out. Its structure was determined based on spectroscopic evidences.
Enade Perdana Istyastono,Agnes Nora Iska Harnita,Sudibyo Martono
The activity of propyl p-benzoyloxybenzoate as a glutathione S-transferase(s) (GSTs) inhibitor has been examined through computational chemistry based theoretical approach and laboratory experiment. This research was related to the nature of GSTs as multi... see more
Supardjan A. Margono,Pudjono Pudjono,St. Layli Prasojo,Jeffry Julianus,Enade Perdana Istyastono
Synthesis and physicochemistry properties prediction of a potential anti-inflammatory agent, diacetyl pentagamavunon-1 (diacetyl PGV-1), has been done. The synthesis was using pentagamavunon-1 (PGV-1) (2,87x10-3 mole) and anhydride acetic acid (26x10-3 mo... see more
Deni Pranowo,Suputa Suputa,Tutik Dwi Wahyuningsih
4-(3,4-dimethoxyphenyl)-3-buten-2-on has been synthesized from veratraldehyde and acetone via aldol condensation. The reaction was performed at room temperature under basic condition for 24 hours to give brown solid of product (m.p 64-6 5oC) in 73.7% yiel... see more
Sri Mursiti,Dewi Selvia Fardhyanti,Edy Cahyono,Sudarmin Sudarmin
The research of Computer Asissted Instruction with animation and simulation was used to misconception remediation of atomic orbital, molecular orbital, and hibridiziation concepts. The applicated instruction model was focused on concept approach with macr... see more