25 articles in this issue
Kris Tri Basuki,Muzakky Muzakky
Adsorption of Am-241, Cs-137 and Sr-90 radionuclides to bentonite-humic acid immobilized yield have been done. The aims of this study are (1) making of adsorbent materials from resulted immobilization humic acid into bentonite mineral, and it's characteri... see more
Anuar Kassim,Tan WeeTee,Dzulkefly Kuang Abdullah,Atan Mohd. Sharif,Ho SoonMin,Gwee Siew Yong,Saravanan Nagalingam
FeS2 thin films have been deposited by using low cost chemical bath deposition technique. The films obtained under deposition parameters such as bath temperature (90 °C), deposition period (90 min), electrolyte concentration (0.15 M) and pH of the reactiv... see more
Erizal Erizal
A series of superabsorbent hydrogels were prepared from acrylamide and carrageenan by gamma irradiation at room temperature. Carrageenan solutions with different concentration (0.5%, 1%, 1.5%, 2%) have been blended with 5% of acrylamide and irradiated at ... see more
Aarti Ameta,Indu Bhati,Rakshit Ameta,Suresh C. Ameta
The photocatalytic degradation of methylene blue dye under visible light has been investigated using chromium modified titanium dioxide supported on zeolite (Cr-TiO2/zeolite). The photocatalyst was prepared by sol-gel method and characterized by X-ray dif... see more
Canggih Setya Budi,Indriana Kartini,Bambang Rusdiarso
Mesoporous titania powders with high-order crystalline building blocks had been synthesized through the sol-gel process using potato starch gel template. Internal spongelike pore structure of starch gel template was generated by heating the starch granule... see more
Endang Tri Wahyuni,Mudasir Mudasir,Tania Avia Gusman
The removal of Cu(II) by photoreduction method using TiO2 photocatalyst in the presence of CN- is reported. Photoreduction was carried by batch technique using UV lamp with 290-350 nm of wavelength. The research results indicate that the present of CN- io... see more
Amri Ismail,Hanggara Sudrajat,Desi Jumbianti
Activated carbons have been produced from the natural biomaterial durian (Durio zibethinus) seed, using phosphoric acid (H3PO4) as the activating agent. The effects of impregnation ratio, activation temperature, heating rate on the carbon surface area, po... see more
Suyanta Suyanta,Narsito Narsito,Endang Tri Wahyuni,Triyono Triyono
The synthesis and characterization of mesoporous aluminosilicates Al-MCM-41 and the investigation of its thermal, hydrothermal and acidity stability have been done. Al-MCM-41 were synthesized by hydrothermal method to the mixture of sodium silicate as Si ... see more
Imam Santoso,Bachri Amran,Apriliana Laily Fitri
The separation of penicillin G from fermentation broth can be done by emulsion liquid membrane technique. The aim of this research is to establish the optimal conditions for the extraction and separation of penicillin G using emulsion liquid membrane tech... see more
A. Sentosa Panggabean,M. Bachri Amran,Buchari Buchari,Subur P. Pasaribu
The determination of Sn(II) ion at trace levels using integrated gas-liquid separator-reactor with hydride generation-quartz furnace atomic absorption spectrophotometer (HG-QFAAS) has been done. This modified gas-liquid separator at various sizes was able... see more
Rinaldi Idroes
Some factors such as the changes of the stationary phase, temperature, pH-value, mobile-phase composition and flow rate play a crucial role in effecting the sensitivity of retention times in high performance liquid chromatography (HPLC) system. Utilizing ... see more
Markus Heryanto Langsa
This study examined the organic constituents aquatically leached from leaf components of two tree species (wandoo eucalyptus and pinus radiate). In particular this study aimed to assess the stable isotope composition behaviour of dissolved organic carbon ... see more
La Harimu,Sabirin Matsjeh,Dwi Siswanta,Sri Juari Santosa
Fe (III), Cr(III), Cu(II), Ni(II), Co(II), and Pb(II) metal ions had been separated using poly(eugenyl oxyacetic acid) as an ion carrier by bulk liquid membrane transport method. The effect of pH, polyeugenyl oxyacetic acid ion carrier concentration... see more
Rumondang Bulan,Mersi Suryani Sinaga,Darnianti Darnianti
Chitosan and Trametes versicolor were used as the material for processing liquid waste product from the jeans washing industry in this study as they were more economics and no negative damage in the environmental life. This research is to find out the chi... see more
Dewi Umaningrum,Uripto Trisno Santoso,Radna Nurmasari,Rahmat Yunus
Study on adsorption kinetics of of Pb(II), Cd(II) and Cr(III) on adsorbent which was produced by protected-crosslinking of humic acid-chitosan has been done. The Langmuir-Hinshelwood, pseudo first- and second-order kinetics models were used to describe th... see more
Radna Nurmasari,Uripto Trisno Santoso,Dewi Umaningrum,Taufiqur Rohman
Immobilization of humic acid (HA) on chitosan beads has been done using a protected cross-linking reaction method and the product was then utilized as sorbent for Pb(II). Protection of the active sites of HA was carried out by interacting HA with Pb(II) b... see more
Iip Izul Falah,Ritmaleni Ritmaleni,M. Utoro Yahya
In view of health, cholesterol is believed as one of many sources can raise several diseases. Hence, both of research in quantification and developing simple, rapid and accurate analysis method of cholesterol in a sample is very important. Aim of this res... see more
Charles Banon
Interactions of an NH3 molecule on chromium (111) surface consists of 20 atoms with three layers has been studied by QCMP 116 (Calzaferri) program, run on IBM PC compatible (Pentium III, 660 MHz). An oncoming NH3 (with the planar molecular plane parallel ... see more
Yahmin Yahmin,Harno Dwi Pranowo,Ria Armunanto
The structure and binding energies of 12-crown-4 and benzo-12-crown-4 complexes with Li+, Na+, K+, Zn2+, Cd2+, and Hg2+were investigated with ab initio calculations using Hartree-Fock approximation and second-order perturbation theory. The basis set used ... see more
Indyah Sulistyo Arty
Five compounds of mono para-hidroxy chalcon were synthesized (TC1, TC2, TC3, TC4, and TC5) and tested their cytotoxicity against HeLa cell and Raji cell. The difference in substituent of TC1 (R4 =H), TC2 (R4 = OCH3), and TC3 (R4 = F), showed the differenc... see more
Rudiyansyah Rudiyansyah,Lynette K Lambert,Mary J Garson
Searching for secondary metabolites from the wood bark of Durio oxleyanus has afforded two new lignans, namely threo-carolignan Y (1) and erythro-carolignan Y (2) together with three other known lignans erythro-carolignan X (3), boehmenan X (4) and boehme... see more
Triana Kusumaningsih,Jumina Jumina,Dwi Siswanta,Mustofa Mustofa
A research has been conducted to synthesize tetra-p-propenyltetraestercalix[4]arene and tetra-p-propenyltetracarboxylicacidcalix[4] arene using p-t-butylphenol as a starting material. The synthesis was carried out in following stages, i.e (1) synthesis of... see more
Desi Suci Handayani,Jumina Jumina,Maulidan Firdaus,Triana Kusumaningsih
The synthesis of poly-5,7-diallyl-25,26,27,28-tetrahydroxycalix[4]arene were performed in experimental series as follows: (1) Cyclotetramerization of p-t-butylphenol with NaOH and paraformaldehyde to p-butylcalix[4]arene, (2) Debutylation of p-butylcalix[... see more
Chanif Mahdi,Aulaniam Aulaniam
Formaldehyde is a simplest organic compound of aldehyde or alkanal group. Formaldehyde is a toxic and carcinogenic substance. Formaldehyde contamination through food or feeding diet continuously is very dangerous for the body, especially for bodies organ ... see more
Tri Joko Raharjo,Tri Wahyudi,Sismindari Sismindari
Regarding a new regulation from Indonesia FDA (Badan POM-RI), all new non patent drugs should show bioequivalence with the originator drug prior to registration. Bioequivalence testing (BE-testing) has to be performed to the people that represented of pop... see more