27 articles in this issue
Bambang Kuswandi
An electrochemical method for the detection of the genotoxic compounds using a DNA-modified electrode was developed. This electrode was successfully used for the electrochemical detection of genotoxic compounds in water samples. The electrochemical result... see more
F. Ahmadi,K. Niknam,A. Khanmohammadi,Z. Adibmehr
A sensitive and simple method for the simultaneous pre-concentration of nutritionally important minerals in real samples has been reported. The method is based on the formation of metal complexes by N, N'-diacetyl-4-bromo-2, 6-di (aminomethyl) phenol (DBD... see more
E. Ristin Pujiindiyati
Karawang area is well known as an agriculture area and 2% area is utilized for industries. Clean water demands increase due to developing industry development and population increasement. The origin of groundwater is necessary to keep the sustainability o... see more
M. Amzad Hossain,S. M. Salehuddin
Toxic normal hydrocarbon (NH), nonadecane in the dichloromethane-hexane crude extract of the flesh of fish samples collected from the different districts of Bangladesh was analyzed by GC-MS/MS. It was observed that NH deposition on the samples takes place... see more
Muhamad Lindu
The treatment of deep well water of Trisakti University by coagulation and flocculation using baffle channel system has been conducted. The detention time of hydrolic were varied. The coagulant dose was varied as 50, 100, 150, 200, 300, 350, 400, 450 and ... see more
Hanik Humaida
The SO2 is one of the volcanic gases that can use as indicator of volcano activity. Commonly, SO2 emission is measured by COSPEC (Correlation Spectroscopy). This equipment has several disadvantages; such as heavy, big in size, difficulty in finding spare ... see more
Sunardi Sunardi,C. Supriyanto
Comparison test of Fast Neutron Activation Analysis (FNAA) and Atomic Absorption Spectrometry (AAS) method for analysis of Cu, Cd, Cr, Pb elements in Code river sediment samples has been done. Comparisons of test used Standard Reference materials (SRM) sa... see more
Muzakky Muzakky,Sri Juari Santosa
The calculation experiments of adsorption capacities of Th-232 and U-238 in ?- Al2O3-humate at single system and competitive with Freundlich method has been done. The purpose of the research is (1) to characterize ?- Al2O3-humat functional groups, (2) to ... see more
Nuryono Nuryono,Narsito Narsito,Endang Astuti
In recent years, the sol-gel technique has attracted increasing interest as a unique approach to immobilize biomolecules for bioanalytical applications as well as biochemical and biophysical studies. In this research, encapsulation of Horseradish peroxida... see more
Uripto Trisno Santoso,Dewi Umaningrum,Utami Irawati,Radna Nurmasari
Immobilization of humic acid (HA) on chitosan has been done by using a protected cross-linking reaction method and the product was then utilized as sorbent for Pb(II), Cd(II), and Cr(III). HA was cross-linked with chitosan by using glutaraldehyde in order... see more
Adlim Adlim,Mohamad Abu Bakar
Chitosan-stabilized gold nanoparticles were synthesized in aqueous formic acid, citric, or acetic acid with and without chitosan as the stabilizer. Refluxing in methanol, addition of hydrazine or sodium borohydride, photo-irradiation were employed as the ... see more
Crescentiana Dewi Poeloengasih,Hernawan Hernawan,M. Angwar
Generally production of chitosan from crustacean shells consists of 4 steps, i.e. deproteinization, demineralization, decolorization and deacetylation. Simplification of chitosan production by elimination of deproteinization and/or demineralization, or re... see more
Bambang Rusdiarso,Eko Sri Kunarti,Saprini Hamdiani
Mesoporous methyl-silica hybrid has been synthesized through sol-gel process, by using tetraethylorthosilicate and methyltriethoxysilane as precursors and tartaric acid as a template. The adsorbent was applied to study the adsorption of alizarin red-S. Th... see more
Nurul Hidayat Aprilita,Indriana Kartini,Sofy Herawati Ratnaningtyas
Preparation and characterization of self-cleaning glass based on acid-treated TiO2 films as well as evaluation on their self-cleaning properties have been carried out. Palmitic acid photodegradation was used as model pollutant. Acid-treated TiO2 powders w... see more
Sugiarto Danu,Darsono Darsono
Most of the medium-density fiberboard (MDF) as an engineered woods need surface coating process before entering final products, such as furniture and building materials. The wood surface should be covered for surface protection from damage during service ... see more
Sri Wardhani,Danar Purwonugroho,Diah Mardiana
Phenol which contained in waste water has to be reduced and it could be done by oxygen oxidation. In order to increase the rate of reaction it was needed a catalyst. In this research the capability of various catalysts, namely zeolite-Zn(II), zeolit... see more
Yoeswono Yoeswono,Triyono Triyono,Iqmal Tahir
A study on palm oil transesterification to evaluate the effect of some parameters in the reaction on the reaction kinetics has been carried out. Transesterification was started by preparing potassium methoxide from potassium hydroxide and methanol and the... see more
Marcellino Rudyanto,Lanny Hartanti
Synthesis of cinnamic acid and its six derivatives has been done by employing Knoevenagel reaction. Benzaldehyde, 4-butylbenzaldehyde, 4-t-butylbenzaldehyde, 4-butoxybenzaldehyde, 4-phenylbenzaldehyde, 5-bromo-2,4-dimethoxybenzaldehyde, and 5-bromo-2,3-di... see more
Deni Pranowo,Edhi Martono,Suputa Suputa,Muchalal Muchalal,Tutik D. Wahyuningsih,M. Yusuf Afandi
4-(4-methoxyphenyl)-3-buten-2-on has been synthesized from p-anisaldehyde and acetone via aldol condensation. The reaction was performed at room temperature under basic condition for 12 hours to give brown solid of product (m.p 64-65 oC) in 66.19 % yield.... see more
Rebecca Christiana,Hari Kristopo,Leenawaty Limantara
Research on chlorophyll a from Spirulina (Spirulina sp.) powder has been done in order to determine chlorophyll a content, to compare degradation pattern and kinetics degradation of chlorophyll a and crude extract as well as to investigate the difference ... see more
S. M. Mizanur Rahman,Swati Shabnom,M. Abdul Quader,M. Amzad Hossain
Furano-napthyl-hydroxy cyclohexyl type of compound was isolated first times in plant from the ethyl extracts of the leaves of Mesua ferrea. The structure of the compound has been established by the modern spectroscopic techniques such as UV, IR, 1H-NMR, 1... see more
Sahidin Sahidin,Euis Holisotan Hakim,Yana Maolana Syah,Lia Dewi Juliawaty,Sjamsul Arifin Achmad,Laily Bin Din,Jalifah Latip
Six resveratrol dimers have been isolated from the stem bark of H. gregaria, ampelopsin A (1), balanocarpol (2), e-viniferin (3), hopeafuran (4), heimiol A (5), and parviflorol (6). The structures of these compounds were determined based on spectroscopic ... see more
Chatarina Wariyah,Mary Astuti,Supriyadi Supriyadi,Chairil Anwar
Calcium absorption kinetic from three varieties rice i.e. low-, medium-, and high amylose content were evaluated. Three calcium salt (calcium acetate, -lactate and - gluconate) were used as a fortifican. Each rice was soaked at the calcium salts at soakin... see more
Supartono Supartono,Nanik Wijayati,Lina Herlina,Enny Ratnaningsih
The efforts to get a new antibiotic require to be done continuously, because infection diseases still become the main health problems in Indonesia. A new local strain of Bacillus subtilis BAC4 has been known producing an antibiotic that inhibites Serratia... see more
Sri Retno Dwi Ariani,Endang Susilowati,Elfi Susanti VH,Setiyani Setiyani
The aim of this research is to know about if the guava (Psidium guajava L.) leaf methanol extract on 10.5 mg/mL and 21.0 mg/mL dossages indicate a positive test as contraception antifertility to white mice (Rattus norvegicus). The sample is guava leaf fro... see more
Erizal Erizal
The pre-clinical study of poly (vinyl pirrolidone) (PVP)-k- carrageenan hydrogel has been carried out. The aim of this study is to investigate the effect of hydrogel for healing burn injuried in the rats. The hydrogels were prepared by g-irradiation of aq... see more
Venny Santosa,Leenawaty Limantara
Photodynamic therapy (PDT) is a considerably new kind of photochemotherapeutic treatment in medical field. It combines the use of three components, which are a photosensitizer, light and oxygen. Photosensitizer is a compound activated by light. The applic... see more