17 articles in this issue
Agung Abadi Kiswandono,Dwi Siswanta,Nurul Hidayat Aprilita,Sri Juari Santosa
Copoly(eugenol-DVB) with DVB composition of 2%, 6% and 12% had been prepared and characterized by FTIR spectroscopy. The copolymers were used as membrane carriers for the transport of phenol using the polymer inclusion membranes (PIM) based on polyvinylch... see more
Erizal Erizal
Modification of poly (acrylamide-co-acrylic acid) superabsorbent hydrogels with varying starch concentration (1-3%) via simultaneous gamma radiation have been carried out. The structure and morphology of copolymers were characterization by Fourier transfo... see more
Wasinton Simanjuntak,Simon Sembiring,Kerista Sebayang
The objective of this study was to evaluate the effect of pyrolysis temperatures on composition and electrical conductivity of carbosil produced from rice husk, by conducting pyrolysis experiments at three different temperatures of 200; 400; and 700 °C. T... see more
Abdullah Abdullah,Triyono Triyono,Wega Trisunaryanti,Winarto Haryadi
Kinetics parameter values of methyl ricinoleate nitration (rate constant, reaction order and the rate of reaction) have been determined. Nitration was carried out with both concentrations of HNO3 and acetic anhydride in excess to the concentration of meth... see more
Restu Kartiko Widi
Reaction kinetics for the oxidation of propane over diluted-leached MoVTeNb is described. This paper is focused on the study of determination of the orders of carbon dioxide, acetic acid and acrylic acid formation. Deep oxidation of propane to carbon diox... see more
Yahmin Yahmin,Harno Dwi Pranowo,Ria Armunanto
The capability of 15-crown-5 ethers to form complexes with some metal cations (Li+, Na+, K+, Zn2+, Cd2+ and Hg2+) was investigated by an ab initio quantum mechanical method. The calculations were performed at the RHF/lanl2mb level of theory. The interacti... see more
Enade Perdana Istyastono
Structure-Based Virtual Screening (SBVS) protocols to identify cyclooxygenase-1 (COX-1) inhibitors have been constructed and optimized based on their Root Mean Square Deviation (RMSD) values of the docked pose and the crystal structure pose of the referen... see more
Elfi Susanti VH,Sabirin Matsjeh,Tutik Dwi Wahyuningsih,Mustofa Mustofa,Tri Redjeki
Synthesis of flavones and their derivatives has attracted considerable attention due to their significant pharmaceutical effects. 7-hydroxy-3',4'-dimethoxyflavone has been synthesized and its antioxidant activity has been investigated. Flavone was synthes... see more
Ruslin Hadanu,Sabirin Mastjeh,Jumina Jumina,Mustofa Mustofa,Eti Nurwening Sholikhah,Mahardika Agus Wijayanti
The synthesis of 5-nitro-1,10-phenanthroline hydrate 2 derivatives from 1,10-phenanthroline monohydrate as starting material has been carried out. The 5-nitro-1,10-phenanthroline hydrate 2 was obtained through nitration reaction using H2SO4 and HNO3 as ca... see more
Tutuk Budiati,Stephanie D.A.,Elisabeth Catherina Widjajakusuma
Condensation reaction has been carried out for the synthesis of some N'-benzylidene-2-hydroxybenzohydrazides using microwave assisted solvent-free method. The structures of all the products obtained in the present work are supported by spectral and analyt... see more
Siti Nuryanti,Sabirin Matsjeh,Chairil Anwar,Tri Joko Raharjo
This study was conducted to isolate anthocyanins from roselle petals and testing the stability toward light. Isolation of anthocyanin was accomplished by extracting roselle petals using eluents with different polarity levels. Nonpolar compounds was elimin... see more
Sutopo Hadi,Mita Rilyanti,Suharso Suharso
A series of dibutyl-, diphenyl- and triphenyltin(IV) benzoate derivatives has been prepared. The products were obtained by reacting the dibutyltin(IV) dichloride, diphenyltin(IV) dichloride and triphenyltin(IV) chloride respectively via the dibutyltin(IV)... see more
Hernawan Hernawan,Bambang Purwono,Tutik Dwi Wahyuningsih
Synthesis and antioxidant activity of 2-methoxy-4,6-di(prop-1-enyl) phenol from eugenol have been investigated. Synthesis was conducted through three stages of reaction. The first step was CTAB micellar catalytic O-allylation reaction at room temperature,... see more
Tukiran Tukiran,Septiani Setyo Cahyasari,Kuniyoshi Shimizu
An ester derivative of 4-methoxycynnamic acid, i.e. 2-ethylhexyl 4-methoxy cynnamate was isolated for the first time from the chloroform extract of stem bark of Xylocarpus moluccencis (Lamk) M. Roem) (Meliaceae) along with ß-sitosterol and stigmasterol. T... see more
Komar Sutriah,Zainal Alim Mas’ud,Tun Tedja Irawadi
Zinc-difattyalkyldithiocarbamates are organosulfur compounds with many functions, including as an antioxidant in a lubrication system. They were synthesized by reacting secondary fatty amine with ZnCl2 and CS2 giving result zinc-difattyalkyldithiocarbamat... see more
Elfita Elfita,Muharni Muharni,Munawar Munawar,Septa Aryani
Garcinia griffithii are known as kandis gajah including the Garcinia genus. This plant has been traditionally used by local communities Sarasah Bonta, Lembah Arau, West Sumatra, to treat various diseases including gout. Aspergillus niger was isolated from... see more
Yuni Retnaningtyas
At present, inulin is often added to multivitamin syrup product. The determination of the component of preparation both qualitatively and quantitatively is important to ensure quality of the product. This research is aimed to develop a high performance li... see more