13 articles in this issue
Nurul Hidayat Aprilita,Rania Bakry,Christian W Huck,Guenther K Bonn
Capillary column with monolithic stationary phase was prepared from silanized fused-silica capillary of 200 µm I.D. by in situ free radical polymerization of divinylbenzene with glycidy methacrylate in the presence of decanol and tetrahydrofuran as poroge... see more
Siti Sujalmi,Suharso Suharso,R Supriyanto,Buchari Buchari
This paper describes a reverse-phase high performance liquid chromatographic (HPLC) method for the separation, identification and quantification of vanillin in ethanolic extracts of cured vanilla. The fresh green beans were cured by three methods: scaldin... see more
Hanik Humaida
The carbon isotope can be used to evaluate volcanism phenomenon of volcano. The study of carbon isotope of CO2 and CH4 was carried out in western Dieng Plateau by mass-spectrometer. Before analysis, sampel was separated by gas chromatography using a Porap... see more
Indriana Kartini,Gao Qing Lu
The role of the synthesis parameters (the molar ratio of template, isopropyl alcohol, acetylacetone, and water with respect to titanium(IV) tetraisopropoxide) has been thoroughly investigated to understand their effects on the mesostructures and the forma... see more
Nuryono Nuryono,Narsito Narsito
In this research, synthesis and characterization of silica gel from sodium silicate through sol-gel process using H2SO4, HCl, and citric acid have been investigated. Synthesis was carried out by mixing and stirring 20 mL of H2SO4, HCl or citric acid... see more
Choiril Azmiyawati,Nuryono Nuryono,Narsito Narsito
Silica gel modified with 4-amino-5-hydroxy-2,7-naphtalenedisulphonate (SG-SO3-) has been applied for adsorption of Mg(II), Cd(II), and Ni(II) in aqueous medium. In addition, three thermodynamic parameters i.e. capacity, adsorption constant and energy of a... see more
Cahya Widiyati,Herry Poernomo
The experiment of solidification of dry sludge of liquid waste of leather treatment are containing chrome (Cr) by using fly ash has been done. The experiment objective are immobilize Cr in the solid waste by using pozzoland cement was made of fly as... see more
Karna Wijaya,Iqmal Tahir,Nanik Haryanti
The preparation of Fe2O3-montmorillonite and it's application as a catalyst for congo red dye photodegradation has been carried out. Fe2O3-montmorillonite was prepared by mixing the iron complexes pillaring agent and montmorillonite. The product was calci... see more
Wega Trisunaryanti,Endang Triwahyuni,Sri Sudiono
Preparation, and modification of Ni-Pd/natural zeolite as well as their characterizations had been carried out. The aim of this research for the fututure is to prepare the best characters catalyst for the conversion of waste plastics fraction to gasoline ... see more
Sutopo Hadi,Trevor G Appleton
A study of the reaction between trans-[Pt(15NH3)2(H2O)2](NO3)2 and N-acetyl-L-cysteine (H3accys) was undertaken to confirm the identity of the products formed. In alkaline solution, the platinum products observed were mononuclear species, while in acidic ... see more
Jumina Jumina,Evi Triwulandari,Chairil Anwar
C-Methyl 4,10,16,22-tetramethoxycalix[4]arene has been synthesized from phenol. The reaction performed consisted of methylation of phenol, acetylation of methyl phenyl ether, reduction of p-methoxyacetophenone, and cyclization of p-methoxy-(1... see more
Muchalal Muchalal
Formation reaction mechanism of 2-methoxy-4-propylphenol on eugenol isomerization that involved protic hydrogen originated from ethylene glycol as a solvent has been done. To check this reaction mechanism, the effect of amounts of ethylene glycol as... see more
Sudibyo Martono
The effect of the curcumin analogues, 2,6-bis-(4-hydroxy-3-methoxy benzylidene) cyclopentanone (B1) and two of its derivatives on m class glutathione S-transferases (GSTs) from phenobarbital-induced and uninduced rat liver cytosol has been studied to eluc... see more