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Indonesian Journal of Chemistry

ijc
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Published by Universitas Gadjah Mada

ISSN : 14119420 EISSN : 24601578 DOI : -

Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry

Indonesian Journal of Chemistry is an International, peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry including applied chemistry. The journal is accredited by The Ministry of Research, Technology and Higher Education (RISTEKDIKTI) No : 21/E/KPT/2018 (in First Rank) and indexed in Scopus since 2012. Since 2018 (Volume 18), Indonesian Journal of Chemistry publish four issues (numbers) annually (February, May, August and November).

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Articles 20 Documents

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Search results for , issue "Vol 7, No 2 (2007)" : 20 Documents clear

APPLICATION OF FENTON’S REAGENT ON REMEDIATION OF POLYCYCLIC AROMATIC HYDROCARBONs (PAHs) IN SPIKED SOIL Nursiah La Nafie
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

Problem associated with Polycyclic Aromatic Hydrocarbons (PAHs) contaminated site in environmental media have received increasing attention. To resolve such problems, innovative in situ methods are urgently required. This work investigated the feasibility of using Fenton's Reagent to remediate PAHs in spiked soil. PAHs were spiked into soil to simulate contaminated soil. Fenton's Reagent (H2O2 + Fe2+) and surfactant were very efficient in destruction of PAHs including naphthalene, anthracene, fluoranthene, pyrene, and benzo(a)pyrene from spiked soil. It was indicated by the fact that more than 96% of PAHs were degraded in the solution and the spiked soil.

PREPARATION OF MESOPOROUS TITANIA-SILICA AEROGELS BY CO2 SUPERCRITICAL EXTRACTION Silvester Tursiloadi; Dinie Mansur; Yeny Meliana; Ruslan Efendi
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

Stable anatase is attractive because of its notable functions for photocatalysis and photon-electron transfer. TiO2-nanoparticles dispersed SiO2 wet gels were prepared by hydrolysis of Ti(OC4H9n)4 and Si(OC2H5)4 in a 2-propanol solution with acid catalyst. The solvent in the wet gels was supercritically extracted using CO2 at 60 oC and 22 Mpa in one-step. Thermal evolution of the microstructure of the extracted gels (aerogels) was evaluated by XRD measurements, TEM and N2 adsorption measurements. The as-extracted aerogel with a large specific surface area, more than 365 m2g-1, contained anatase nanoparticles, about 5 nm in diameter. The anatase phase was stable after calcinations at temperatures up to 1000 oC, and BET specific surface area, total pore volume and average pore diameter did not change significantly after calcinations at temperature up to 800 oC.

CHROMIUM (III) ADSORPTION FROM AQUEOUS SOLUTION BY Rhizophora apiculata TANNINS C. W. Oo; K. Jain
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

Adsorption of Cr3+ from aqueous solution by Rhizophora apiculata tannins was investigated in batch shaking experiments. Tannins extracted from R. apiculata mangrove barks was chemically modified with formaldehyde in the basic solution of sodium hydroxide. The performance of the produced adsorbent on the adsorption of Cr3+ was evaluated based on the effect of several parameters like initial pH, adsorbent dosage, initial Cr3+ concentration and contact time. Equilibrium adsorption data was analyzed by Langmuir, Freundlich, Sips and Dubinin-Raduskhevich (D-R) isotherms. The fitness of the isotherms to the experimental data was determined by non-linear regression analysis. Adsorption capacity calculated from Langmuir isotherm was found to be 10.14 mg Cr3+/g of adsorbent at optimum adsorption pH of 4.5. Mean energy of adsorption with the value of 10.35 kJ/mol indicated that adsorption Cr3+ on Rhizophora apiculata tannins followed ion-exchange reaction. Kinetic study showed that the adsorption process followed the pseudo second-order kinetic model.

RELATION BETWEEN PORE MODEL AND CENTER-LINE TEMPERATURE IN HIGH BURN-UP UO2 PELLET Suwardi Suwardi
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

Relation between pore model and center-line temperature of high burn up UO2 Pellet. Temperature distribution has been evaluated by using different model of pore distribution. Typical data of power distribution and coolant data have been chosen in this study. Different core model and core distribution model have been studied for related temperature, in correlation with high burn up thermal properties. Finite element combined finite different adapted from Saturn-1 has been used for calculating the temperature distribution. The center-line temperature for different pore model and related discussion is presented.

STRUCTURE MODIFICATION OF ANDROGRAPHOLIDE TO IMPROVE ITS POTENCY AS ANTICANCER Hadi Poerwono; Yoshiyuki Hattori; Hajime Kubo; Kimio Higashiyama
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

Andrographolide, a diterpenoid lactone isolated from the herb of Andrographis paniculata and known to possess antitumor activity in breast cancer models was subjected to semisynthesis leading to the preparation of a number of derivatives. After protection of the two hydroxyl groups present at C-3 and C-19 to give 3,19-isopropylidene and 3,19-benzylidene andrographolides, the remaining hydroxyl group at C-14 of andrographolide was treated with acid anhydride or acid chloride under base condition. Unfortunately, the reactions gave only 14-dehydroandrographolide as well as unidentified diacyl compounds in replace of the target molecule 14-O-acyl andrographolide. An alternative procedure using neat acetic anhydride under reflux gave the acetyl derivatives. The resulted compounds exhibited cytotoxic activity against MCF-7 breast cancer cells with better growth inhibition than the parent compound andrographolide.

KINETIC TRANSFORMATION OF SPINEL TYPE LiMnLiMn2O4 INTO TUNNEL TYPE MnO2 Daud K Walanda
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

Lithiated phase LiMn2O4 is a potential cathode material for high-energy batteries because it can be used in conjunction with suitable carbon anode materials to produce so-called lithium ion cells. The kinetic transformation of LiMn2O4 into manganese dioxide (MnO2) in sulphuric acid has been studied. It is assumed that the conversion of LiMn2O4 into R-MnO2 is a first order autocatalytic reaction. The transformation actually proceeds through the spinel l-MnO2 as an intermediate species which is then converted into gamma phase of manganese dioxide. In this reaction LiMn2O4 whose structure spinel type, which is packing between tetrahedral coordination and octahedral coordination, is converted to form octahedral tunnel structure of manganese dioxide, which is probably regarded as a reconstructive octahedral-coordination transformation. Therefore, it is a desire to investigate the transformation of manganese oxides in solid state chemistry by analysing XRD powder patterns. Due to the reactions involving solids, concentrations of reactant and product are approached with the expression of peak areas.

TRANSPORT OF Cr3+, Cd2+, Pb2+, AND Ag+ IONS THROUGH BULK LIQUID MEMBRANE CONTAINING p-tert-BUTYLCALIX[4]ARENE –TETRACARBOXYLIC ACID AS ION CARRIER Maming Maming; Jumina Jumina; Dwi Siswanta; Hardjono Sastrohamidjojo
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

The research on transport of Cr3+, Cd2+, Pb2+, and Ag+ through bulk liquid membrane using p-tert-butylcalix[4]arene-tetracarboxylic acid as ions carrier has been conducted. The aims of this research were to determine optimum condition, efficiency, and selectivity of transport of the ions carriers to those ions. Both optimum condition and efficiency of transport were obtained by determination of transported ions concentration with pH variation of source phase, ionic carrier concentration, nature of stripping agent in target phase, and transport time. The transport selectivity of ions carrier was obtained from experiments of equimolar mixture ions transport competition. Amount of Cr3+, Pb2+, Cd2+, and Ag+ transported across liquid membrane were about 6, 80, 84 and 87 % respectively after being transported for 48 h. The ion carrier was selective for both Pb2+ ion (separation factors are 9.6 for Ag+ ion, 1.9 for Cd2+ ion and infinite for Cr3+ ion) and Ag+ ion (separation factors are 1.8 for Cd2+ and infinite for both Pb2+ and Cr3+ ions). This system represents a proton-coupled transport with flow of protons in the opposite direction.

PRELIMINARY STUDIES FOR PRODUCING CRUDE LIPASE FROM TEMPE’S MOULD CULTIVATED IN RICE-HUSK-BASED SOLID MEDIA Teuku Beuna Bardant; Kiky Corneliasari Sembiring; Achmad Hanafi Setiawan
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

The goal of these preliminary studies is to support Indonesian program for increasing palm oil added value through independent production technology based on Indonesian natural resources. Various palm oil derivatives could be synthesized enzymatically using lipase from microbes that available in Indonesia. Tempe's mould is available in abundance in Indonesia and had already been proved for producing lipase. This paper provides information about producing crude lipase from Tempe's mould cultivated in rice-husk-based solid media using palm oil as carbon source. Observed variables include solid media composition, optimum fermentation time, extraction and enriching process of crude lipase. The crude lipase was analyzed its hydrolysis activity on coconut oil and palm oil. The result of these preliminary studies shows that this production process is a simple and tough process and very potential to be developed.

THE USE OF TIO2-ZEOLIT AS A CATALYST ON THE DEGRADATION PROCESS OF ERIONIL RED DYE Agustin Sumartono; Winarti Andayani
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

Degradation of erionil red dye using photo catalytic processes with TiO2-zeolit as a catalyst was carried out. Degradation of the dye was observed in 10 L volume, and erionil red dye was used as a model of organic pollutant. The parameters examinated were intensity of the spectrum, the decrease of pH, percentage of degradation, and the efectifity TiO2-zeolit as a catalyst. The use of UV lamp and TiO2-zeolit as a catalyst showed a good results because the dye could be degraded. This could be seen from the decreasing of the intensity of the spectrum 24 h after illumination. The pH of erionil red increased from around 4 into 5.5 which is still acidic. Effectivity of TiO2 composit as a catalyst could be used only two times. The compound resulted from degradation that could be detected using HPLC was oxalic acid.

SYNTHESIS AND ANTIPLASMODIAL ACTIVITY TESTING OF (1)-N-(4-METHOXYBENZYL)-1,10-PHENANTHROLINIUM BROMIDE Ruslin Hadanu; Sabirin Mastjeh; Jumina Jumina; Mustofa Mustofa; Mahardika Agus Widjayanti; Eti Nurwening Sholikhah
Indonesian Journal of Chemistry Vol 7, No 2 (2007)
Publisher : Universitas Gadjah Mada

Synthesis of (1)-N-(4-methoxybenzyl)-1,10-phenanthroline bromide from 1,10-phenanthroline monohydrate and 4-methoxybenzaldehyde as starting material and evaluation of its antiplasmodial activities have been carried out. The 4-methoxybenzyl alcohol was prepared from 4-methoxy-benzaldehyde using sodium borohydride (NaBH4) reagent and ethanol absolute solution. The mixture was refluxed for 3 h. To yield colorless dilution compound with 90.41 % in efficiency. Furthermore, bromination of 4-methoxybenzyl alcohol with phosphorus bromide (PBr3) was conducted by refluxing for 3 h. The product of this reaction was yellow liquid of 4-methoxybenzyl bromide, 79.03% yield and 95.34 % purity. The final step of reaction was benzylation of 1,10-phenanthroline monohydrate with 4-methoxybenzyl bromide reagent. It was conducted by refluxing in aceton for 8 h at 55 oC. The yield of the reaction was (1)-N-(4-methoxybenzyl)-1,10-phenanthroline bromide (77.63%). It is pink solid form, and its melting point is 192-193 oC. Identification of the product was carried out by means of GC-MS, IR and 1H-NMR spectrometers. The in vitro antiplasmodial activity on chloroquine-resistant Plasmodium falciparum FCR-3 strain and chloroquine sensitive P. falciparum D10 strain for (1)-N-(4-methoxybenzyl)-1,10-phenanthroline bromide were determined by microscopic method. The result showed that after 72 h incubation, it has IC50 0.93±0.02 µM and 1.21±0.09 µM, respectively.

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