21 articles in this issue
Ahmad Mudzakir
A new series of ionic liquids based on 1,3-alkylmethyl-1,2,3-benzotriazolium cation has been prepared. The spectroscopic, physical and electrochemical characteristics of this family of salts have been investigated with respect to potential usage as ionic ... see more
Edy Giri Rachman Putra,Abarrul Ikram
Small Angle Neutron Scattering (SANS) investigation on the self-assembly sodium dodecyl sulfate (SDS) molecules as a function of concentration and additives has been carried out. SANS spectrometer which has been completely installed at the neutron scatter... see more
Fitria Rahmawati,Sayekti Wahyuningsih,Pamularsih A.W
Thin film of TiO2 on graphite substrat has been prepared by means of chemical bath deposition. Cetyltrimethylammonium Bromide served as linking agent of synthesized TiO2 to graphite substrate.The optical microscope and Scanning Electron Microscope (... see more
Suyanta Suyanta,Agus Kuncaka
The objective of this research is to study the effect of pH and metal concentration toward the mass of metal oxides coated on gaphite in the synthesis of dimensionally stable anode (DSA) gaphite/La2O3-ZrO2 and gaphite/RuO2-TiO2. The synthesis of those&nbs... see more
Ratna Dewi Kusumaningtyas
The usual problem encountered on a reversible reaction is that the reaction cannot achieve a complete conversion of reactants since it is limited by the thermodynamic equilibrium. Due to this low conversion, it will face challenges with product purificati... see more
Rohmat Sulistya,Djoko Hartanto,Irmina Kris Murwani
The quality improvement of Bojonegoro Clay and the cobalt distribution on the surface of ceramic body system have been studied. The ceramic body system consists of Bojonegoro Clay, feldspar and quartz is optimized using a triaxial blend method. About 6 co... see more
Harno Dwi Pranowo,Chairil Anwar
The effect of substituent on dibenzo-16-crown-5 (DBz16C5) and interaction between these crown ether with metal cations was evaluated using computational chemistry calculations. Substituens where are connected to the benzene ring on the DBz16C5 are -COOH, ... see more
Valencia Widiyaningrum Wandoyo,Mudasir Mudasir,Roto Roto
A specific, selective and simple method for speciation of chromium(VI) and chromium(III) has been developed. This method is based on the quantitative extraction of chromium(VI) and chromium(III) as an ion association of tetramethylammonium-chromate in met... see more
Ganden Supriyanto,Jürgen Simon
A novel method is proposed for the hydride separation when determinining of arsenic and antimony by AAS. A chromatomembrane cell was used as preconcentration-, extraction- and separation-manifold instead of the U-tube phase separator, which is normally fi... see more
Saryati Saryati,Sumardjo Sumardjo
The adsorptive stripping voltammetric determination of Ni and Co based on adsorption of the Ni/Co and dimethylglioxime (DMG) complex on a hanging mercury drop electrode is studied. The reduction current of the adsorbed DMG complex is measured by square wa... see more
Dedy Suhendra,W. M. Z. Wan Yunus,Md. Jelas Haron,Mahiran Basri,Sidik Silong
A method of copper (II) ion preconcentration and separation from other ions by using a column containing fatty hydroxamic acids - loaded Amberlite XAD 4 resin (FHA-Amb) is described. Several factors, which affect the separation and preconcentration e... see more
Sunardi Sunardi,Muryono Muryono
Determination of limit detection of the elements N, P, K, Si, Al, Fe, Cu, Cd, with fast neutron activation using neutron generator has been done. Samples prepared from SRM 2704, N, P, K elements from MERCK, Cu, Cd, Al from activation foil made in Sa... see more
E. Ristin Pujiindiyati,Zainal Abidin
There are at least 30 high temperature systems; eleven active volcanoes, five degassing volcanoes and one caldera volcano controlled by Sumatra Fault Zone over a length of 1700 km. To understand this geothermal field system, some information about geochem... see more
Noor Fitri,Björn Thiele,Klaus Günther,Buchari Buchari
A capillary electrophoretic (CE) analysis with ultra-violet (UV) detection was performed for further separation of low-molecular-mass (LMM) calcium species in phloem sap of Ricinus communis L. Two different background electrolytes (BGE) were used for the ... see more
Pirim Setiarso,Selvi Purwanti N.
Research on the extraction of Nickel(II) and Copper(II) using liquid membrane emulsion technique has been conducted. The purpose of this research is to know the influence of pH, extraction time and presence of competed metals (Ni2+ in Cu2+ and vice versa)... see more
Siswoyo Siswoyo,Trio F. Nugroho,Zulfikar Zulfikar,Agus Subekti
A new type of sensing materials for humidity measurement has been developed based on conducting polymer polypyrrole synthesised from pyrrole by adding some dopant compounds, bromide and chloride, it is prepared by potentiodynamic-electropolymerisation tec... see more
Endang Tri Wahyuni,Mudasir Mudasir,Ngatidjo Hadipranoto
The influences of ionic Fe(III) and colloidal Fe(OH)3 on the effectiveness of p-chlorophenol photodegradation catalyzed by TiO2 has been studied. Photodegradation was carried out in a batch system by irradiating a suspension of TiO2, p-chlorophenol, and F... see more
Nita Suhartini
A study of soil erosion rates had been done on a slightly and long slope of cultivated area in Ciawi - Bogor, using 137Cs technique. The objective of the present study was to evaluate the applicability of the 137Cs technique in obtaining spatially distrib... see more
Rudiana Agustini
Thermophile protease has economic value, because this enzyme is useful on all kind of industry that used high temperature on it production process. The thermophile has been isolated from hot water spring at Cangar Batu Malang called CG-10 isolate. The cha... see more
Endang Astuti,Deni Pranowo,Santi Dwi Puspitasari
There were many research on Phaleria macrocarpa (Scheff.) Boerl. fruit for its activity as possible anticancer. However, there wasn't investigation that P. macrocarpa seed and fruit meat ethanol extract effect to normal cell. The research was conducted to... see more
Ochtavia Prima Sari,Titik Taufiqurrohmah
Boesenbergia pandurata (Roxb.) Schlecht is one of fingerroot plant in ginger family (Zingiberaceae). The rhizomes of the plant contained a lot of secondary metabolites compounds. Therefore, the purpose of the research is to isolate and identify the flavon... see more