8 articles in this issue
Rymond J Rumampuk
A trisaccharide chain in a saponin from the seeds of Barringtonia asiatica has been identified and sequenced as {[b-D-galactopyranosyl(1®3)- b-D-glucopyranosyl(1®2)]-b-D-glucuronopyranosyloxy} using a combination of homonuclear and heteronuclear correlati... see more
Fredryk Mandey
An investigation of base promoted reaction of phenylanthranilate and isocyanate has been carried out. The reaction between phenylanthranilate (11) and phenylisocyanate and n-butylisocyanate gave remarkable yields of corresponding 1,3-Benzo-diazine-2,4-dio... see more
Sofyan M Nur,Soetijoso Soemitro,Husein Hernandi Bahti,Ponis Tarigan,Yue Mao Shen,Rymond J Rumampuk
Three new chemical constituents have been isolated from the stem bark of Alangium kurzii Craib. The structures were respectively determined to be 4-cyclohexene-1,2,3-triol 1, 3-ß-stigmast-5-en-3-ol (ß-sitosterol 2), and 3-O-ß-D-glucopyranosyl-stigmast-5-e... see more
Hendry Yanuar
Acetylcholinesterase (AchE) is an enzyme, which work on acetylcholine hydrolysis. Some insecticides can inhibit the activities of this enzyme. The purpose of this research was determined the kinetics of the AchE inhibition over the organophosphate and car... see more
Agung Purwanto,Narsito Narsito
An adsorbent was prepared by impregnating 2-mercaptobenzo-thiazole onto polystirene treated diatomaceous earth support. This adsorbent was then applied to adsorb mercury(II) in aqueous medium. The mercury(II) adsorption characteristics of the adsorbent wa... see more
Hanoch J Sohilait,Hardjono Sastrohamidjojo,Sabirin Matsjeh,J Stuart Grossert
The Synthesis of 3.4-methylenedioxyphenyl-2-propanone from safrole has been achieved through conversion of allyl group to secondary alcohol, followed by oxidation with pyridinium chlorochromate(PCC). The secondary alcohol has been achieved by two me... see more
Imam Santoso,Buchari Buchari
Extraction of silver (I) has been studied from black/white printing photographic waste by emulsion liquid membrane technique. Composition emulsion at the membrane phase was cerosene as solvent, sorbitan monooleat (span 80) as surfactant, dimethyldioctades... see more
Dirk Bax
Thai people like to cover sacred objects or things dear to them with gold leaf.. Statues of Buddha are sometimes covered with so many layers of gold leaf that they become formless figures, that can hardly be recognized. Portraits of beloved ancestors, sta... see more