31 articles in this issue
Buhani Buhani,Narsito Narsito,Nuryono Nuryono,Eko Sri Kunarti
Modification of silica gel with 3-aminopropyltrimethoxysilane and 3-mercaptopropyltrimethoxysilane through sol-gel technique producing amino-silica hybrid (HAS) and mercapto-silica hybrid (HMS), respectively, has been carried out using tetraethylorthosili... see more
Khoirina Dwi Nugrahaningtyas,Wega Trisunaryanti,Triyono Triyono,Nuryono Nuryono,Dian Maruto Widjonarko,Ari Yusnani,Mulyani Mulyani
The two-new catalysts had been prepared by using the impregnation method according to Nugrahaningtyas [6] and Li [4]. One catalyst is of Nickel (Ni), supported on Ultra Stable Zeolite Y (USY), whereas the other one is NiMo supported on same supporting age... see more
Paulina Taba
One source of water pollutions is caused by the high use of surface-active agents (surfactants) by industries and households. As a consequence, it is required to remove such substances from the environment One of the important and widely used methods for ... see more
Hasanudin Hasanudin,Karna Wijaya,Budi Santoso
It has been prepared Co, Mo and Co/Mo-Al2O3-pillared montmorillonite catalysts using montmorillonite clay as raw material. The structure and porosity of the catalysts were determined using N2 adsorption-desorption and FT-IR spectroscopy analysis met... see more
Wega Trisunaryanti,Handirofa Handirofa,Triyono Triyono,Suryo Purwono
Preparation, characterization and catalytic activity test of CoMo/ZnO catalyst for steam reforming of ethanol have been investigated. The catalysts preparation was carried out by impregnation of Co and/or Mo onto ZnO sample. Water excess was used in ethan... see more
Anna Roosdiana,Tutik Setianingsih,Diah Mardiana,Suratmo Suratmo
Whey lactose can be esterified enzymatically by using immobilized lipase. The lipase can be isolated from Rhizopus oryzae, purified and immobilized in mesoporous aluminosilica. The use of immobilized lipase has advantages, there are longer shelf life and ... see more
Suharso Suharso,Buhani Buhani,Tati Suhartati
The role of C-methyl-4,10,16,22-tetrametoxy calix[4]arene as inhibitor of calcium carbonate scale formation has been investigated. The result shows that C-methyl-4,10,16,22-tetrametoxy calix[4]arene inhibits a formation of calcium carbobate crystals at a ... see more
June Mellawati
Determination of uranium in water sample at Gresik coastal waters around Gresik industrial area have been carrid out. The purpose of research is to find the distribution of uranium at the coastal where the phosphate industry standing and potencially to co... see more
Alianto Alianto,Enan M. Adiwilaga,Ario Damar,Enang Harris
At a few this last years, measurement concentration of dissolved inorganic nutrient is has rapidlyed grow by using various methods. But method anything applied must based on at formation of indicator end of measurement amonia, nitrite, nitrate, orthophosp... see more
Harsojo Harsojo,June Mellawati
The determination of mineral content and bacteria contaminant on fresh vegetable of long bean (Vegan ungulate Wall.), white cabbage (Basic tolerance L.), and lettuce (Lectuca sativa L.) that cultivated by organic and nonorganic system have been done. The ... see more
Diah Dwiana Lestiani,Muhayatun Muhayatun,Natalia Adventini
Neutron activation analysis (NAA) is a nuclear technique that is excellent, multi-elemental, sensitive and has limit detection up to nanogram level. The application of NAA in analysis of Standard Reference Material (SRM) National Institute of Standard Tec... see more
Sunardi Sunardi,Samin Samin,C. Supriyanto
The validity test of Fast Neutron Activation Analysis (FNAA) and Atomic Absorption Spectrometry (AAS) method for analysis of Cu and Fe elements in biota samples has been done. The validity test was represented by the validation test, homogenous test, Z-sc... see more
Saryati Saryati
The direct determination of some metals impurity in uranium by using differential pulse anodic stripping voltammetry (DPASV) method at a hanging mercury drop electrode and in a carbonate buffer media was developed. It was found that the carbonate buffer s... see more
Harry Budiman,Fransiska Sri H,Krismastuti Krismastuti,Nuryatini Nuryatini
The evaluation of uncertainty measurement in the determination of Fe content in powdered tonic food drink using graphite furnace atomic absorption spectrometry was carried out. The specification of measurand, source of uncertainty, standard uncertainty, c... see more
Choirul Amri,Dwi Siswanta,Mudasir Mudasir
A study of extraction-spectrophotometric method for the determination of trace nitrite as 4-(4-nitrobenzenazo)-1-aminonaphthalene complex using n-amylalcohol and chloroform as organic solvents has been done. Results of the study showed that extraction-spe... see more
La Harimu,Sabirin Matsjeh,Dwi Siswanta,Sri Juari Santosa
Polyeugenyl oxyacetic acid has been synthesized from polyeugenol and chloroacetic acid and applied to separate metal Fe(III), Cr(III), Cu(II), Ni(II), Co(II), and Pb(II) using solvent extraction method. pH effect, polyeugenyl oxyacetic acid ion carrier co... see more
I Made Sudarma,Maria Ulfa,Sarkono Sarkono
The overall objective of this research was to develop new compounds with potential biological activity from readily accessed natural products, in particular eugenol. Eugenol has been reported to posses antioxidant and anticancer properties. In an attempt ... see more
Daniel Daniel
Candle nut oil could be transesterificated by methanol with concentrated H2SO4 as a catalyst to form fatty acid methyl esther. Methyl linoleate could be separated by Column Chromatography mechanism technic partition from fatty acid methyl ester (FAME) mix... see more
Marham Sitorus,S. Ibrahim,H. Nurdin,D. Darwis
The ricinoleic of Castor Oil was dehydrated by various dehydrator agent (P2O5, K2CO3, H3PO4, NaHSO4, Al2O3, molecular sieve and activated bentonite at 450 °C - HCl) on the same condition (150 °C, mol ratio 1:1 and 2 hours ). The compositions of Refined Ri... see more
Mehtab Parveen,Sayed Hasan Mehdi,Raza Murad Ghalib,Mahboob Alam,Rokiah Hashim,Othman Sulaiman
The new 1, 2, 3, selenadiazole derivative (3) was prepared from friedelin (1) via the corresponding semicarbazone (2) using Lalezari cyclization. The compounds were prepared, separated and characterized on the basis of microanalysis and spectral studies. ... see more
Hanggara Sudrajat,Muhammad S. Saefullah,Danis Sriwijaya,Mirta A. Putri,Ria Armunanto
The structure and NMR chemical shifts of endo-cone [CS2(p-methylcalix[4]arene)] complex have been computationally investigated using BIO+ force fields, semi-empirical (PM3) and ab initio (RHF/6-311G++(d,p)) calculations. The first comparison of ab initio ... see more
Parsaoran Siahaan,Cynthia L. Radiman,Susanto Imam Rahayu,Muhamad A. Martoprawiro,Dieter Ziessow
It has been obtained the anisotropy ratio a = T1(ortho-,meta-13C)/T1(para-13C) of dilute solutions of bn change from 1.7 in fa solution and 1.5 in neat bn to 1.0 in HMPT. Thus the anisotropy ratio comes out to be a = 1. In HMPT, obviously, solvent molecul... see more
Rahmana Emran Kartasasmita,Rina Herowati,Nuraini Harmastuti,Tutus Gusdinar
Due to their ability to inhibit cyclooxygenase-2 (COX-2), certain flavonoids show anti-inflammatory effects. Quercetin is a flavonoid suitable to be chosen as the lead compound for development of safe anti-inflammatory agent, because in addition to its an... see more
Winarto Haryadi,Umar Anggara Jenie,Retno Sunarminingsih Sudibyo,Harno Dwi Pranowo,Fajar Rakhman Wibowo
D6-anhidroeritromisin-A is a new derivative of erythromycin which is synthesized through biosynthetic engineering technique. The molecular docking in rRNA 23S Deinoccocus radiodurans are accomplished to determine the model and strength of binding to the t... see more
Tati Herlina,Unang Supratman,M. S. Soedjanaatmadja,Anas Subarnas,Supriyatna Sutardjo,Noor Rain Abdullah,Hideo Hayashi
During the course of our continuing search for novel anti-malarial compounds from Indonesian plants, the methanol extract of the bark of E. variegata showed significant anti-malarial activity toward Plasmodium falciparum in vitro using the lactate dehydro... see more
Fredryk Mandey,Raimundus Chalik,Ismail Ibrahim
This research is aimed to primarily study the spectroscopy of ether fraction of from Jati wood (T. grandis, L). The stem bark of T.grandis, L was firstly extracted undergoes a reflux in methanol solvent. Further, the dried methanol crude extract was extra... see more
Sahidin Sahidin
Five resveratrol oligomers which consist of two resveratrol dimers, balanocarpol (1) and e-viniferin (2), a resveratrol trimer i.e. a-viniferin (3), and two resveratrol tetramers, vaticanol B (4), and hopeaphenol (5) have been isolated from acetone e... see more
Muharni Muharni,Supriyatna Supriyatna,Husein H. Bahti,Dachriyanus Dachriyanus
A phenolic compoud, (-)-epicatechin, was isolated from the stem bark of Garcinia bancana. The structure of this compound was determined base on spectroscopic data such as including UV, IR, 1-D, 2-D NMR, and comparison with the reported data. B... see more
Nunuk Hariani Soekamto,Nursiah La Nafie,Fredryk Welliam Mandey,Marry Garson
Norartocarpetin (1), together with mulberrin (2) and mulberrokromen (3) were isolated from Artocarpus fretessi (Moraceae). This plant is an endemic species in Indonesia and locally known as ";Kelembi"; or ";Maumbi";. The structure of these compounds were ... see more
Sri Moerniati,Agustine Susilowati,Aspiyanto Aspiyanto
Preparation of Hydrolyzed Vegetable Protein (HVP) as savory flavor from fermented red bean broth through stirred membrane cell using micro filtration membrane with pore size of 0.45 µm was performed to get fortified agent utilized in preparation of beans ... see more
Agustine Susilowati,Aspiyanto Aspiyanto,Sri Moerniati,Yati Maryati
Amino acids produced through brine fermentation of mung beans (Phaseolus radiatus sp) by inoculum of Rhizopus-C1 at room temperature for 0, 2, 4, 6, 8, 10, and 12 weeks, respectively had a potential use as savory fraction for seasoning agent. The objectiv... see more