9 articles in this issue
Hidenari Inoue
In recent years studies on the interaction of porphyrin with DNA have received much attention because of the importance in DNA-probing and photodynamic therapy of cancer. A variety of spectroscopic methods, e.g. NMR, ESR, Mössbauer, UV-visible absorption,... see more
Narsito Narsito
This paper deals with some practical problems related to the quality of analytical chemical data usually met in practice. Special attention is given to the topic of quality control in analytical chemistry, since analytical data is one of the primary infor... see more
Karna Wijaya
In this review, two sort of materials i.e layered and porous materias which were studied by the author and coworkers intensively and extensively will be described. These materials generally can be classified into two groups, namely layered organic a... see more
M Muchalal,Trisulistyaningsih Rahayu
Main and side products from reaction of caryophyllene oxide and formic acid have been isolated using column chromatography with silica gel 60 G as stationary phase and n-hexane : ethyl acetat (9:1, v/v) as mobile phase. The first and second fraction were ... see more
Mudasir Mudasir,Mugiyanti Mugiyanti,Ngatidjo Hadipranoto
An analytical method for the spectrophotometric determination of some phenolic compounds, i.e.: pyrocathecol and pyrogallol based on their redox reaction with iron(III)-phenanthroline complex has been developed. These two compounds, in appropriate conditi... see more
Bambang Setiaji,Ani Setyopratiwi,Nahar Cahyandaru
A research to know influence of mixing concentration of coconut water and sucrose concentration to coconut milk skim as nata de coco substrate has been conducted. The variation was taken from mixing coconut water (0%, 25%, 35% and 50% and 100% as control)... see more
Hery Haerudin,Nino Rinaldi,Adel Fisli
The modification of bentonite by pillarization using aluminum polycation type Keggin [Al13O4(OH)24(H2O)12]7+ has been carried out, by exchange of cation from interlayer with aluminum polycation. The amount of aluminum polycation, which was used for the pi... see more
Wega Trisunaryanti,Mudasir Mudasir,Siti Saroh
The matrix effect of various metals on the analysis of nickel and palladium in destruate of catalysts of Butonian asphalt-derived asphaltene by atomic absorption spectroscopy have been investigated. Samples were dissolved by wet decomposition method... see more
Tutik Arindah,Bambang Setiaji,Harno Dwi Pranowo
Determination of solvation structure of Ni2+ ion in water has been achieved using Monte Carlo method using canonic assemble (NVT constant). Simulation of a Ni2+ ion in 215 H2O molecules has been done under NVT condition (298.15 K). The results showed that... see more