Jurnal Kimia (Journal of Chemistry)
Jurnal Kimia (Journal of Chemistry) publishes papers on all aspects of fundamental and applied chemistry. The journal is naturally broad in scope, welcomes submissions from across a range of disciplines, and reports both theoretical and experimental studies.
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<![CDATA[ISOLASI DAN IDENTIFIKASI SENYAWA YANG BERPOTENSI SEBAGAI ANTITUMOR PADA DAGING BUAH PARE (Momordica charantia L.) ]]>
<![CDATA[Wiwik Susanah Rita]]>;
<![CDATA[I W. Suirta]]>;
<![CDATA[Ali Sabikin]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[Isolation and identification of the compound which has a potency as antitumor from bitter melon have beencarried out. Extraction was conducted n-hexane, chloroform, and ethanol respectively using each extracts obtainedwere examined with brine shrimp lethality test. The most toxic extract was ethanol extract (LC50 223 ppm).Separation and purification of the compounds from the ethanol extract were conducted by column chromatogaraphyusing a gel silica 60 as the stationary phase and benzene : acetic acid ( 8:2) as the mobile phase. This yielded 3fractions. Then the fractions were examined with brine shrimp lethality test and the most toxic fraction was found tobe the fraction 1 (LC50 31,62 ppm), but the fraction that was analysed further was fraction 3 (LC50 100 ppm),because fraction 1 consists of using compounds that were difficult to separate. The purity fraction 3 was testedconducted thin layer chromatography and its activity as antitumor agent was tested using Agrobacterium tumefacienA-208. The test was in 6 weeks and that fraction 3 has a potency as an antitumor agent at 1000 ppm.The identification with gas chromatography – mass spectroscopy indicate that the antitumor isolate frombitter melon contains 3 mayor compoundsnamely dioxtyl hexadioate esther, palmitic acid, stearic acid.]]>
<![CDATA[PENURUNAN ANGKA PEROKSIDA MINYAK KELAPA TRADISIONAL DENGAN ADSORBEN ARANG SEKAM PADI IR 64 YANG DIAKTIFKAN DENGAN KALIUM HIDROKSIDA ]]>
<![CDATA[Sri Wahjuni]]>;
<![CDATA[Betty Kostradiyanti]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[Research on IR64 rice shell ash activation with KOH was carried out. Then, this activated ash known asadsorbent was applied to absorb H2O2 solution. This adsorbent was then applied to absorb peroxide number oftraditional coconut oil.The research includes activation of rice ash with 5%, 10%, and 15% KOH, followed by determination ofrate and isotherm adsorption towards H2O2. Finally, the ash was applied to absorb traditional coconut oil, in order todecrease peroxide number of the oil.Research results indicated that, adsorption rate of the ash with KOH activation is higher than without KOHactivation. Adsorption isotherm patern of the ash with and without activation is following Langmuir adsorption. Riceshell ash activated with 15% KOH can increased adsorption capacity of H2O2 about 297.16 mg/g, whereas withoutactivation the adsortion capacity is about 271.66 mg/g. Activated ash with 15% KOH was the applicated to decreaseperoxide number of traditional coconut oil. In this study, we obtain that the ash can decreased peroxide number until84.4%.]]>
<![CDATA[ADSORPSI ANION Cr(VI) OLEH BATU PASIR TERAKTIVASI ASAM DAN TERSALUT Fe2O3 ]]>
<![CDATA[I. A. Gede Widihati]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[The research is about adsorption of three sand type (river, black beach, and white beach) wated with Fe2O3with and without H2SO4 activated Cr(VI) in water. The research covers the determination of surface acidity of sandby acid-base titration method, their specific surface area by blue methylene method, and of the adsorption,equilibrium adsorption isotherm, and adsorption capacities to Cr(VI) by atomic absorption spectrophotometer.The results indicate that activated white beach sand (AA2) has highest surface acidity (0.4741 mmole/g).The highest specific surface area is given by the sand control (A) (30.8969 m2/g), of beach sand is given by white tosand of AA2 (30.1203 m2/g). Adsorption capacity of sand on Cr(VI) increases with H2SO4 activation. Hignesscapacities is shown by the white beach sand of AA2 (1.0601 mg/g). Free energy adsorption (GoAds) on Cr(VI) ofwhite beach sand is -15.5053 kJ/mole indicating a weak chemical adsorption.]]>
<![CDATA[ISOLATION AND IDENTIFICATION MOMORDICIN I FROM LEAVES EXTRACT OF Momordica charantia L. ]]>
<![CDATA[N. M. Purnawati]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[Momordicin I has been isolated from dichloromethane extract of leaves Momordica charantia, L. Theisolation was done by fractionation the dichloromethane extract followed by bioassay using artemia salina,L larvae.The crude extract was fractionated through reverse phase column chromatography (C18 Sep-Pak) with eluotropicseries solution of MeOH: H2O (0-100% MeOH). The most active fraction, F9 (80% MeOH-20% H2O) was purifiedby recrystallisation from chloroform to yield a white crystal melted at 125-128oC. The structure of the activecompound was determined by interpretation of the spectral data (IR, 1HNMR, 13CNMR, DEPT, HCOSY, HMCOSY,HMBC and MS) and its structure was elucidated as 3,7,23-trihydroxycucurbitan-5,24-dien-19-al which is known asmomordicin I.]]>
<![CDATA[ADSORPSI PENGOTOR MINYAK DAUN CENGKEH OLEH LEMPUNG TERAKTIVASI ASAM ]]>
<![CDATA[P. Suarya]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[Preparation, characterization and application of acid activated clays as adsorbents on the purification of clove leavesoil have been conducted. The effects of concentration of acid on the quality of the activated clay and on theadsorption performance of the prepared activated clay were also studied. Characterization of the activated clay wascarried out using gas sorption analyzer and FTIR spectroscopyThe results showed that the spesific surface area of the activated clays increases with increasingconcentration of acid. At the concentration of acid of 0, 0.4, 0.8, 1.2, 1.6, and 2.0 M, the spesific surface areas were48.27; 48.75, 54.31; 65.21; 62.91 and 51.86 m2/g, respectively. From the adsorption test, it was observed that theactivated clay prepared with concentration acid of 1,2 M, showed the best performance. It’s was able to adsorp 284.2mg of impurity and thus purify 40 ml of crude clove leaves oil.]]>
<![CDATA[PROSES BIOSORPSI DAN DESORPSI ION Cr(VI) PADA BIOSORBEN RUMPUT LAUT Eucheuma spinosum ]]>
<![CDATA[N. P. Diantariani]]>;
<![CDATA[I W. Sudiarta]]>;
<![CDATA[N. K. Elantiani]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[Studies on biosorption and desorption of chromium (VI) on seaweed (Eucheuma spinosum) biosorben havebeen carried out. These studies included determination of biosorben acidity, optimum pH, contact time ofbiosorption, isoterm and biosorption capacity, and mechanisms of interaction between chromium (VI) and seaweed(Eucheuma spinosum) biosorben. Mechanisms of interaction were known with desorption chromium (VI) onseaweed biosorben using aquades, 1 M HCl and 0,05 M Na2EDTA.The result showed that the total acidity of seaweed biosorben was 4,1545 ± 0,3290 mmol/g, the optimum pHwas 5, and the contact time was 120 minute. Biosorption capacity of seaweed (Eucheuma spinosum) to chromium(VI) was 13,4992 mg/g. The highest desorption of chromium (VI) occurred with the use of aquadest which was40,69%. Whereas desorption using 1 M HCl and 0,05 M Na2EDTA were 4,84% and 0,20% respectively. This caseindicated that the main interaction mechanism of chromium (VI) on seaweed was hydrogen and Van der Waals bondwhich was relatively weak.]]>
<![CDATA[AKTIVITAS ANTIBAKTERI SENYAWA GOLONGAN TRITERPENOID DARI BIJI PEPAYA (Carica papaya L.) ]]>
<![CDATA[I M. Sukadana]]>;
<![CDATA[Sri Rahayu Santi]]>;
<![CDATA[N. K. Juliarti]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[Isolation, identification, and antibacterial activity examination have been conducted for triterpenoidscompounds of carica papaya L. Maseration of 500 g pawpaw seed powder in n-hexane gave 21.66 g extract whichreacts with Liebermann-Buched reagent resulting in colour change (yellow to purple). Column chromatographyseparation of the extract resulted in 0.05 g yellow isolate (F3) which contains aldehyde triterpenoids. Infrared spectraindicated aliphatic –C-H stretching, -CH2 bending, -CH3 bending, and C=O. Ultra violet – visible spectra showedabsorption at 228.5 nm and proad peak at 287.7 nm. Antibacterial axamination showed that 1000 ppm at the isolateinhibits the growth of Escherichia coli and Staphylococcus auerus.]]>
<![CDATA[ISOLASI DAN IDENTIFIKASI GLIKOSIDA STEROID DARI DAUN ANDONG (Cordyline terminalis Kunth) ]]>
<![CDATA[N. W. Bogoriani]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[Isolation and identification of two steroid glicosides have been conducted from Andong leaves (Cordylineterminalis Kunth). The isolate (4,0 mg white amorphous solid) was obtained after a series of chromatographicseparations. Identification of the isolate using mass spectrometry with positive electrospray showed MW 868 ascalculated from the ion peaks of m/z 891[M + Na]+, and 869[M + H]+. The ion peaks of isolate at m/z 727[(M +Na) - 164]+, 723[(M + H) - 146]+, 705[(M + H) - 164]+, and 413 [(M + H) - 456]+ of its fragments indicated thepresence of three sugars (two terminal sugars and one central sugar) from methylpentose moeity (each of MW 164)linked to an agyicone. Proton magnetic resonance spectrum of the isolate in pyridine-d5 showed characteristicproton signals for three steroid methyls (two angular methyls and one secondary methyl) at d 1.37 (s), 0.85 (s) and1.06 (d, J = 6 Hz); and one methyl group for C25 at d 0,66 ppm (d, J=6 Hz); an ethylene group at d 5.51 ppm (br d, J= 5.7 Hz); signals of the protons linked to C26 at d 4.13 and 3,49 ppm (each br d, J = 9,3 Hz and 9 Hz), and threeanomeric protons at d 6.43 ppm (br s); 5.56 ppm (br s) and 4.57 ppm (d, J = 7.0 Hz). From the above data it can beassumed that the isolate is a spirostan steroidal glicoside.]]>
<![CDATA[CEMARAN PESTISIDA FOSFAT-ORGANIK DI AIR DANAU BUYAN BULELENG BALI ]]>
<![CDATA[I. B. Putra Manuaba]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[Pesticide is a chemical used to destroy or to control any pest that damages plant, animal, etc. Therefore,pesticide is very important for protecting plant, animal, and in controlling vector-borne diseases. The use of pesticideis therefore inevitable. A study to investigate the organophosphate pesticide residue in water of Lake Buyan wascarried out.This is an expost facto study with Analytical Cross Sectional Study design. Sample preparation for thispurposed was carried out following a standard method. Gas chromatography was employed in order to gain theorganophosphate pesticide contaminant.Organophosphate pesticide contaminant, i.e. dimethoate, chlorphyrifos and prophenofos were observed on55 water sampling point taken from 5 zone. The residual contaminant of dimethoate; chlorphyriphose; andprophenophose, were 9.3, 3.5, and 2.1 ppb respectively. Total residual contaminant was 14.9 ppb which was bellowthreshold concentration of 100 ppb (SK Gubernur Bali No. 515 Tahun 2000).]]>
<![CDATA[ISOLASI DAN IDENTIFIKASI SENYAWA TERPENOID YANG AKTIF ANTIBAKTERI PADA HERBA MENIRAN (Phyllanthus niruri Linn) ]]>
<![CDATA[I W. G. Gunawan]]>;
<![CDATA[I G. A. Gede Bawa]]>;
<![CDATA[N. L. Sutrisnayanti]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008 ]]>
Publisher : <![CDATA[Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia ]]>
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<![CDATA[Isolation and identification of terpenoid, antibacterial compounds meniran herb (Phyllanthus niruri Linn) by GasChromatography – Mass Spectroscophy were carried out. Two kinds of extraction, i.e. maseration using methanoland the sochlet using n-hexane were employed.The extract obtained were contains terpenoids basedon fitochemical test of Liberman-Burchard n-hexaneextract was tested for antimicrobial activity against Escherichia coli ATCC® 25292 and Staphylococcus aureusATCC® 25293. In this study we obtained that n-hexane extract by sochlet extraction showed greater activitycompared to the extract by maseration with methanol, as indiated by disc diameter of inhibition zone. Diametricinhibition zone for these two extract are 1 mm for Escherichia coli and 0,5 mm for Staphylococcus aureus, formethanol extract, and where are 10 mm for Escherichia coli and 12 mm for Staphylococcus aureus for n-hexaneextract.The n-hexane extract was then purified using column chromatography. The pure extract was analyzed usingGas Chromatography - Mass Spectroscophy. Gas Chromatography - Mass Spectroscophy data indicated that theextract contains two compounds, i.e. phytadiene [ M+ ] 278 and 1,2 seco – cladiellan m/z 335 [ M+ - H ].]]>
