18 articles in this issue
Anggita R.K. Wardani,Nurul Widiastuti
Zeolite X supported on fiber material (glasswool) was successfully synthesized using a simple hydrothermal method. Variation of immersion time and NaOH concentration were used for glasswool activation. Activation process of glasswool has effects toward cr... see more
Is Fatimah,Dwiarso Rubiyanto,Nanda Candra Kartika
The influence of calcination temperature on the synthesis of zirconia-pillared saponite (PILS) and on its catalytic activity in menthol esterification has been studied. Zirconia pillarization was conducted using zirconium tetraisopropoxide as a precursor ... see more
Muzakky Muzakky,Supriyanto C
Three types of bentonite modified with ZOC local products of Center for Accelerator Science and Technology-National Nuclear Energy Agency using intercalation process have been done. The purpose of this research is to create new material as a catalyst or i... see more
Endang Purwanti Setyaningsih,Maya Machfudzoh,Wahyu Prasetyo Utomo,Hamzah Fansuri
Asymmetric dense and thin membranes have been prepared from powders of perovskite oxide-type CaTiO3 without cracking by phase inversion method. Polyetherimide was used as a polymeric binder in the method. The resulting green membranes, composed of CaTiO3 ... see more
Taufik Ashar,Wirsal Hasan,Hamonangan Nainggolan,Erman Munir
Cadmium (Cd) is a toxic element ubiquitous in the environment and can cause kidneys damage. The aim of this study was to determine the concentration of Cd in wells water and urine of population that lived around Namobintang dumpsite, and to examine the qu... see more
Abdul Wafi,Ganden Supriyanto,Tjitjik Srie Tjahjandarie
An analytical method for determination of chloramphenicol (CAP) based on the diazotization reaction at room temperature has been developed. The CAP was reduced using zinc powder (Zn) and diazotization reaction was carried out at room temperature in the pr... see more
Idha Yulia Ikhsani,Sri Juari Santosa,Bambang Rusdiarso
Adsorption of disperse dyes from wastewater onto Ni-Zn LHS (layered hydroxide salts) and Mg-Al LDH (layered double hydroxides) has been compared in this study. Effects of initial pH solution, contact time and initial dye concentration were investigated. T... see more
F. Widhi Mahatmanti,Nuryono Nuryono,Narsito Narsito
In this research, chitosan based membrane blended with rice hull ash (RHA) silica and polyethylene glycol (PEG) has been applied as adsorbent of Ca(II), Mg(II), Zn(II) and Cd(II) in an aqueous solution. Membrane was synthesized by blending RHA silica and ... see more
Ptoton Mnangat Brian,Peter Musau
This paper reports the synthesis and reactivity of different Benzyl derivative protecting groups. The synthesis and stability of Benzyl halides, 4-methoxybenzyl halides, 3,5-dimethoxybenzyl halides, 3,4-dimethoxybenzyl halides, 3,4,5-trimethoxybenzyl hali... see more
Masruri Masruri,Rekfa Wika Amini,Mohammad Farid Rahman
Catalytic oxidation of alpha-pinene was investigated using potassium permanganate as an oxidant. The reaction consumed catalyst following stoichiometric amount instead of the catalytic one. The keto-carboxylate compound 2 was afforded as the oxidation pro... see more
Dian Susanthy,Purwantiningsih Sugita,Suminar Setiati Achmadi
Chitosan-glycerophosphate hydrogel can be used as dental scaffold due to its thermosensitivity, gelation performance at body temperature, suitable acidity for body condition, biocompatibility, and ability to provide good environment for cell proliferation... see more
Nurhani Aryana,Yosi Aristiawan,Dillani Putri,Dyah Styarini
The candidate reference materials of endosulfan sulfate and bifenthrin in black tea have been developed according to the requirements of ISO Guide 34 and 35. Preparation of candidate material includes grinding and sieving of the black tea leaves, spiking ... see more
Adita Silvia Fitriana,Harno Dwi Pranowo,Bambang Purwono
The interactions between sensor chalcone of 3-(4-hydroxy-3-methoxyphenyl)-1-phenyl-2-propen-1-one (1) and anions (F–, Cl–, Br–, CN–, CO32–, and SO42–) have been experimentally and TD-DFT theoretically investigated. Sensor (1) showed a naked-eye detectable... see more
Yeni Wahyuni Hartati,Santhy Wyantuti,M. Lutfi Firdaus,Nurul Auliany,Rini Surbakti,Shabarni Gaffar
Typhoid fever caused by Salmonella typhi is an important issue for public health in the world. Laboratory methods for rapid and sensitive diagnosis are very important for disease management. The purpose of this study was to determine the performance of ne... see more
Laksmi Ambarsari,Inda Setyawati,Rini Kurniasih,Popi Asri Kurniatin,Akhiruddin Maddu
Glucose oxidase (GOx) is being developed for many applications such as an implantable fuel cell, due to its attractive property of operating under physiological conditions. This study reports the functional immobilization of glucose oxidase onto polyanili... see more
Yusuf Muhammad Zein,Anil Kumar Anal,Didik Prasetyoko,Imroatul Qoniah
Biodiesel production from waste palm oil catalyzed by hierarchical ZSM-5 supported calcium oxide was studied. The activity of CaO increased after supported on h-ZSM-5 resulting an increase in conversion from 93.17% to 95.40%. A maximum conversion of 95.40... see more
Risfidian Mohadi,Lusi Teresia,Najma Annuria Fithri,Aldes Lesbani,Nurlisa Hidayati
Catalyst (NH4)6[b-P2W18O62]/Ta has been synthesized by simple wet impregnation at 30-40 °C under atmospheric conditions using Dawson type polyoxometalate (NH4)6[b-P2W18O62] and tantalum. The catalyst was characterized by FTIR spectrophotometer, XRD, SEM, ... see more
Annas Wiguno,Asalil Mustain,Wahyu Fazar Eka Irwansyah,Gede Wibawa
Isothermal vapor-liquid equilibrium (VLE) data for two binary mixtures of methanol + glycerol and 1-propanol + glycerol were determined at the temperature range from (313.15 to 363.15) K using a simple quasi-static ebulliometer. All systems showed that th... see more