21 articles in this issue
Usman Usman,Takeshi Kubota,Yasuaki Okamoto
The effect of boron addition was studied on the hydrodesulfurization (HDS) of thiophene over Co-MoS2/B/Al2O3 (CVD-Co/MoS2/B/Al2O3), which was prepared by a CVD technique using Co(CO)3NO as a precursor of Co. The catalyst was characterized by means of NO a... see more
Eko Sri Kunarti,Grainne M Moran
Hybrid organosilicate nanotubes have been prepared by sol-gel chemistry, using crystalline ammonium tartrate as the tube-forming template. The nanotubes were prepared by controlled hydrolysis and co-condensation of tetraethyl orthosilicate (TEOS) and meth... see more
Sutopo Hadi
he synthesis of two stable platinum(IV) complexes containing methoxo ligand, [Pt(CH3)2(OCH3)(OH)py2] (1) and fac-[Pt(CH3)2(OCH3)(H2O)3] (2), has been successfully performed. Complex 1 was prepared by oxidative addition reaction of cis-[Pt(CH3)2py2] with d... see more
Fitria Rahmawati,Abu Masykur,Heni Worowidiyanti
The objective of this research is to study wheather the emulsion system of water/SDS (Sodium Dodecyl Sulphate)/ethanol/n-hexane can be transformed from S1 (hydrocarbon in water) type to S2 (water in hydrocarbon). CdS can be synthesized in the transformed ... see more
Suharso Suharso
The growth rates of borax crystals from aqueous solutions in the (001) direction at various relative supersaturations were measured using in situ cell optical microscopy method. The result shows that the growth mechanism of the (001) face of borax crystal... see more
Sahat Simbolon
Thermogravimetric curve of UO2 oxidation reaction with oxygen from room temperature 25 oC to 425 oC had been depicted in three dimensions. The temperature oxidation reaction of UO2 sample was arranged 5 oC / minute and it was found that increasing of samp... see more
Nurul Hidayat Aprilita,Rania Bakry,Christian W Huck,Guenther K Bonn
Poly(styrene/divinylbenzene) (PS/DVB) monolithic disk was prepared by in situ free-radical copolymerization of styrene and divinylbenzene in the presence of decanol and tetrahydrofuran as porogens. PS/DVB monolithic disks were produced in two different le... see more
Raharjo Raharjo
An investigation of the contribution of quartz sand in the bentonite mixture as the backfill materials on the shallow land burial of radioactive waste has been done. The experiment objective is to determine the effect of quartz sand in a bentonite mixture... see more
Winarto Haryadi,Muchalal Muchalal,Robby Noor Cahyono
Preparation of activated carbon from silk cotton wood and coconut shell has been done. Carbon was made by pyrolysis process in the Muchalal furnace with 3000 watt electric power. The electric power was increased gradually from 1000, 2000 and then 3000 wat... see more
Rudiana Agustini
The CG-10 isolate is a thermophile microorganism live in extreme environments, a hot spring located at Cangar East Java, having temperature 50 oC. The isolate had following characteristics: rod shaped cells, gram-positive, size of cells 6-14 µm, aerobic, ... see more
Sari Edi Cahyaningrum,Amaria Amaria
Utilization of shrimp shell has been optimum so that in this research preparation of adsorbent chitosan from shell of shrimp (Penaus monodon) as raw materials for cadmium(II) adsorption was carried out. The chitin was made by the deproteination, demineral... see more
Sri Noegrohati
Estuarine ecosystem of Segara Anakan is located in south coast of Central Java, shielded from Indian Ocean by Nusakambangan island. The ecosystem of Segara Anakan estuary, Central Java, Indonesia, is influenced by fresh water inflow from Citanduy river ba... see more
Maria Monica Sianita Basukiwardojo
Acetaldehyde is a compound of aldehyde group that is very volatile and toxic. This compound can be found in fructose syrups used in carbonate beverages. The syrups had been distilled then analysed using gas chromatography. The concentration of acetaldehyd... see more
Aline Puspita Kusumadjaja,Rita Puspa Dewi
A study to investigate the optimum condition of papain enzyme has been carried out. The condition that are investigated are pH and temperature, based on measurement of enzyme activity which is defined as mmole tyrosin that are released in reaction between... see more
Ngatidjo Hadipranoto
EPA (Eicosapentaenoic acid) and DHA (Docosahexaenoic acid) content in common fresh water fish : mujahir (Oreochromis mossambicus) after indirect heating were analysed. The aims of this study were to determine the effect of indirect heating process and a-t... see more
Jumina Jumina
1-Phenacyl-3-aryl-4,6-dimethoxyindoles 2b and 2c were obtained in good yields respectively through cyclization of N,N-diphenacylaniline 1b and 1c in trifluoroacetic acid. However, instead of giving pyrroloindole 3c, treatment of phenacylindole 2c with pol... see more
Sri Handayani,Sunarto, Sunarto,,Susila Kristianingrum
The aim of this research is to determine the optimum time of reaction and concentration of hydroxide ion on chalcone, 4-methoxychalcone and 3,4-dimethoxychalcone synthesis. Chalcone and its derivatives were synthesized by dissolving KOH in ethanol followe... see more
Muchalal Muchalal
Catalytic hydrogenation of eugenol (Mr 164) and isoeugenol (Mr 164) by using synthetic catalyst Ni/?-Al2O3 had been carried out. Eugenol transformation into 2-methoxy-4-propylphenol (Mr 166) as a main product could be achieved in 100% and no conversion re... see more
Suyatno Suyatno,Noor Cholies Zaini,Motoo Tori
A flavonoid compound in flavonol type namely kaemferol was isolated from the ethyl acetate fraction of the methanol extract of the fern Chingia sakayensis (Zeiller) Holtt's leaves. The DPPH free radical scavenger activity of kaemferol was stronger than bu... see more
Gemini Alam,Puji Astuti,Subagus Wahyuono,Dinar Sari,Mark T Hamman
Two alkaloid compounds have been isolated from sponge Petrosia sp collected from Bunaken Bay Menado. These compounds have been found to inhibit several human cancer cell proliferation in vitro. Structure elucidation is needed to further characterize these... see more
Edwin Widodo,Aulanni’am Aulanni’am
Zonna pellucidae can be develop as antigen potential candidates based on reversible immunocontraceptive vaccines. Immunogenic sites of bovine zonna pellucidae 3 (bZP3) could stimulated the presence of anti-bZP3 which be located on rabbit ZP and inhibit sp... see more