22 articles in this issue
Dhanus Suryaman,Kiyoshi Hasegawa,Shigehiro Kagaya,Toshiaki Yoshimura
To shorten the biological treating time and to examine the effect of electrolytes in a model water on the photocatalytic treatment, the combined biological-photocatalytic treatment was evaluated for removal of a mixture (total: 100 mg L-1, each: 25 mg L-1... see more
Winarti Andayani,Agustin Sumartono
Study of TiO2 and TiO2 active carbon photocatalyst was done. Immobilization was carried out by sol-gel process using titanium diisopropokside bis-acetylacetonato as titanium precursor. The catalyst was characterized using XRD and SEM. The activity of cata... see more
Sergio Leon De Rooy,Endang Tri Wahyuni,Wiratni Wiratni,Siti Syamsiah,Jamil Ismail
Purification and characterization of biodegradable plastic namely Polyhydroxybutyrate (PHB) in Cupriavidus necator have been carried out. C. necator was grown on a Ramsay medium with fixed substrate conditions and optimized for time. Stepwise purification... see more
Abdul Haris Watoni,Suryo Gandasasmita,Indra Noviandri,Buchari Buchari
A conducting polymer, polypyrrole, has been electrochemically synthesized from pyrrole monomer using cyclic voltammetry technique in aqueous solution in the presence of HDS dopant and KNO3 supporting electrolyte. The polymer was deposited on the surface o... see more
Yohan Yohan
Sulfonation of g-ray iradiated and styrene-grafted crosslinked polytetrafluoro ethylene film (cPTFE-g-S film) have been done. The aim of the research was to make hydrophyl membrane as proton exchange membrane fuel cell. Sulfonation was prepared by using c... see more
M. Monajjemi,A. Nouri,H. Monajemi
The hydrogen bonding effects that were produced from interaction of membrane lipid dipalmitoylphosphatidyl-ethanolamine (DPPE) with 1-5 water molecules, has been theoretically investigated through the quantum mechanical calculations at the Hartree-F... see more
Parsaoran Siahaan,Cynthia L. Radiman,Susanto Imam Rahayu,Muhamad A. Martoprawiro,Dieter Ziessow
Intermolecular interactions and molecular translational and rotational mobility are key factors in molecular material sciences, e.g. liquid crystals. One of the important substructures is given by phenylacetylene, Ph-CºCH. Its rotational behavior in its p... see more
F. Ahmadia,A. Khanmohammadi,A. Malekpour
A cloud point extraction method was presented for preconcentration of copper in various samples. After complexation with 4-Amino-2,3-dimethyl-1-phenyl-3-pyrazoline-5-one (ADPP) or N-Benzoyl-N-phenylhydroxylamine (BPA) in water, analyte ions are quan... see more
Ani Mulyasuryani,Qonitah Fardiyah,Rizki Sugiri
The iodate-selective electrode based on the principle of precipitation reaction could be made by coating the platinum wire with silver iodate (AgIO3). In this research was carried out optimization the iodate-selective electrode using chitosan membrane as ... see more
Firdaus Firdaus,Jumina Jumina,Hardjono Sastrohamidjojo
The effects to the extractability forwards Cr3+, Cd2+, and Pb2+ ions of de-tert-butylation and functionalization with amine groups at the upper rim of p-tert-butylcalix[4]arene had been studied by applied the p-tert-butylcalix[4]arene (1), tetrahydroxycal... see more
Harry Budiman
The identification and analysis of chemical warfare agents and their degradation products is one of important component for the implementation of the convention. Nowadays, the analytical method for determination chemical warfare agent and their degradatio... see more
Erizal Erizal
The application of electron beam for treatment gases pollution of SO2 and NOx has been studied. The simulated SO2 and NOx gases stream produced from diesel fuel burning boiler were flown into electron beam chamber. Irradiation was conducted using 10... see more
Ali Arman Lubis,Barokah Aliyanta,Yulizon Menry
The investigation of sediment accumulation rate has been carried out in Jakarta Bay. The aim of this study is to estimate the accumulation rate of sediment using natural radionuclide 210Pb as a tracer, through the profile of unsupported 210Pb. Sedim... see more
Johan Sibarani,Syahrul Khairi,Yoeswono Yoeswono,Karna Wijaya,Iqmal Tahir
Biodiesel conversion from transesterification reaction palm oil with methanol was studied by using an ash of palm empty bunch as a base catalyst. Atomic absorption spectroscopy (AAS) and indicator titration analysis were used as tools for characterization... see more
Hendig Winarno
Terminal alkynol (w-alkynol) is an intermediate compound in synthesis of a potent anticancer agent, namely C-16 alkynic fatty acid. For synthesis of this intermediate compound, it is needed to synthesize the appropriate internal alkynol, namely 2-nonyn-1-... see more
I Made Sudarma,John Bremner
The objective of this research was to synthesize isoquino[2,1-c][1,3]benzodiazepine from papaverine alkaloid. Functional Group Interconversion (FGI) and Carbon -Nitrogen bond connection approach was investigated. Papaverine (1) was nitrated by HNO3 to com... see more
Tang, C.S Tang, C.S,Norziah M.H Norziah M.H
Betacyanin pigments from red-purple pitaya fruit (Hylocereus polyrhizus) could be an attractive source of red colourant for food application. This paper presents results on the extraction of betacyanin pigments from pitaya fruits grown locally in Malaysia... see more
Suarni Suarni,Rauf Patong
Mung bean sprouts contain enzyme of a-amylase. A research on the effect of the sprout age and sprout varieties to the a-amylase activity and the protein level has been carried out in Laboratorium Bioproses BB Pascapanen Bogor using Full Factorial Ra... see more
Tri Joko Raharjo,Rusmiati Suprihatin,Deni Pranowo
A study on the influence of organic solvent protein precipitation to the profile of the serum protein has been accomplished. The expected conditions were precipitation of abundant proteins present in serum result in increasing relative concentration of mi... see more
Muharni Muharni,Dachriyanus Dachriyanus,Husein H. Bahti,Supriyatna Supriyatna
A xanthone, 1,5-dihidroxy-3,6-dimethoxy-2,7-bis-(3-methylbutenyl)xanthone had been isolated from the stem bark of Garcinia bancana Miq. The structure of this compound was elucidated by analysis of spectroscopic data, especially using 1D and 2D NMR s... see more
Suyatno Suyatno,Sri Hidayati Syarief,Nurul Hidajati,Kuniyoshi Shimizu
Two known alkylated flavonoid namely matteucinol dan matteucinol-7-O-b-D-glucoside was isolated for the first time from the fern Chingia sakayensis (Zeiller) Holtt's stem. Their structures were elucidated on the basis of spectroscopic evidence and by comp... see more
Abdullah Rasyid,Kyoko Adachi
The bioactive substance producing strain, a marine bacterium A5S-46 was found in the antibacterial screening. This strain was isolated from the artificial sponge set in the coastal seawater at Iriomote islands (Japan). The crude extract from culture broth... see more