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Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia
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Jurnal Kimia (Journal of Chemistry)
Published by Universitas Udayana
ISSN : 19079850     EISSN : 25992740     DOI : https://doi.org/10.24843/JCHEM
Core Subject : Science,
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.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 9 Documents
 1 
Search results for , issue "vol. 3, no. 1 januari 2009" : 9 Documents clear
ADSORPSI ION Pb2+ OLEH LEMPUNG TERINTERKALASI SURFAKTAN I. A. Gede Widihati
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
Publisher : 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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Abstract

Intercalation of Bentonit clay with quaternary ammonium salt, N-cetyl, N,N,N –trimethyl ammoniumbromide in the presence of palmitic acid was investigated in this research. The aim was to improve the capacity ofBentonit clay as adsorbent for lead ion (Pb2+). The salt used has a capacity of 8 mmol/10kg clay, which equal to itscapacity as cation exchanged. After intercalating process, palmitic acid was added and then clay was ready to beused as adsorbent for lead ion (Pb2+).Characterisation of physical chemistry properties of the intercalated Bentonit clay was performed using Xraydiffractometer for basal spacing distance between interlayer Bentonit clay, infra red spectrometer for Brownsteadacid site, and atomic adsorption spectroscopy to determine the capacity of adsorption by analyzing isothermadsorption and equilibrium temperature data.It was found that the intercalation of Bentonit clay with quaternary ammonium salt, N-cetyl, N,N,N –trimethyl ammonium bromide increased the distance between interlayer Bentonit clay (basal spacing from 15.9236Ao to 21.0554 Ao. The infra red spectra data revealed the appearance of Brownstead acid site at n 1419.5 cm-1. Theresult also found that the capacity of Bentonit clay as adsorbent for lead ion (Pb2+) improved from 1.9565 mg/gbefore intercalation to 4.0263 mg/g (after intercalation process).
STUDI PERBANDINGAN HASIL SINTESIS METIL-N(2,3-XILIL)ANTRANILAT DENGAN PEREAKSI DIAZOMETANA DAN BF3-METANOL I W. G. Gunawan
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
Publisher : 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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Abstract

N(2,3-xylyl)antranilic acid is an analgesic drug which works by inhibiting synthesis of prostaglandin.Through this mechanism N- (2,3-xylyl)antranilic acid causes gastro iritation. Therefore, this research aims tosynthesise N- (2,3-xylyl)antranilic ester derivatives using BF3-methanol and diazomethane methods, and to findwhich methods will give the best result.Diazomethane used for methylation reaction needs to be fresh because it is an unstable gas, while BF3-methanol needs refluxing for 10-15 hours. The physico chemical properties of methylation product werecharacterised using colour reaction testing, melting point, and Rf value, while the structure was identified using UVvis,FT-IR and 1HNMR.It was found that diazomethane method gave better yield (68%) compared to BF3-methanol (52%). N- (2,3-xylyl)antranilic methyl ester obtained using both methods was found as a yellowish-white shiny crystal having thesame degree of purity. In addition, both product revealed the same physico chemical properties such as meltingpoint, colour, and Rf value. Hence, the products obatined using both methods were identical which was N- (2,3-xylyl)antranilic methyl ester.
PERBANDINGAN MASSA OPTIMUM CAMPURAN PEWARNA ALAMI PADA KAYU JENIS AKASIA (Acacia leucopholea) N. W. Bogoriani; A. A. Bawa Putra
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
Publisher : 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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Abstract

Wood is one of several materials that is very useful for man. Now adays wood with low quality tends to beused more. The high demand causes good quality wood getting harder to find. To overcome this problem, low qualitywood like acacia was dyed using a mixture of natural dye. The dye was prepared from urcaria gambir-piper betleLinn leaves, areca catechw seed, and 0.5 % w/v of CaCO3 in water. The physical and chemical properties of thedyed wood was tested using aluminium sulphate solution and detergent solution.The optimum mass for the dye was 5.3 uncaria : 3.0 piper; 3.0 areca. After 30 minutes soaking in themixture, reddish brown coolour was produced, with maximum adsorption of 0.23 g in wood surface that showeddurability of the dye highest from dye appearance and mixture mass that be lost.
CEMARAN PESTISIDA KARBAMAT DALAM AIR DANAU BUYAN BULELENG BALI I. B. Putra Manuaba
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
Publisher : 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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Abstract

Pesticide is a very important material for protecting plant, animal, and controlling vector-borne diseases.The use of pesticide by farmer at Lake Buyan area is inevitable. The aim of this study is to investigate carbamatepesticide residual contaminant in water of Lake Buyan.This is an observational study to investigate carbamate contaminant in water of Lake Buyan. Samplepreparation for this purposed was carried out following the standard method. GC-MS was employed in order todetermine the carbamate pesticide contaminant.Carbamate pesticide contamination, i.e. carbofurane and methomyl were observed on 55 water samplingpoint taken from 5 zone. The residual contaminant of carbofurane and methomyl were 6.1 and 8.9 ppb, respectively.Total residual contaminant was 15.0 ppb with, which was bellow the threshold concentration of 100 ppb (SKGubernur Bali No. 515 Tahun 2000).
AMPLIFIKASI FRAGMEN 0,4 KB DAERAH D-LOOP DNA MITOKONDRIA LIMA INDIVIDU SUKU BALI TANPA HUBUNGAN KEKERABATAN DENGAN METODE POLYMERASE CHAIN REACTION (PCR) K. Ratnayani; Sagun Chandra Yowani; Liangky Syane S
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
Publisher : 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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Abstract

The human mitochondrial DNA (mtDNA) has higher polimorfism level than nucleous genom, and it ismaternally transmitted. D-Loop is a non-sense region in human mtDNA that has the highest polimorfism. Generally,the aim of this research is to find out the variation in D-Loop region of mtDNA in some Balinese without familycorrelation. For that reason, this research was brought out to determine the sequences of nucleotide of D-Loop regionin five normal Balinese from different families without correlation. The specific aim of this research is to amplify the0,4 kb fragment of mtDNA D-Loop region in five Balinese above, using the PCR methode. In conducting the PCR,the temperature of annealing of primer and the weight of template of mtDNA were optimized. Several phases thathave been conducted : 1). Lisis of the cavum oris epithelium; 2). Quantation of DNA; 3). Reaction PCR; 4). Result ofPCR detection with agarosa gel electroforesisThe result of this research is the amplification of 0,4 kb fragment of D-Loop region in mtDNA by PCR.This research also found the optimum temperature annealing, which was 55 0C, and the optimum weight of templateof DNA which was ± 0,688 ?g.
INTERKALASI BENZALKONIUM KLORIDA KE DALAM MONTMORILLONIT TERAKTIVASI ASAM DAN PEMANFAATANNYA UNTUK MENINGKATKAN KUALITAS MINYAK DAUN CENGKEH P. Suarya
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
Publisher : 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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Abstract

This research was conducted to observe the surfactant intercalation into acid-activated montmorillonite clay.This clay was applied as adsorbent for increasing the quality of clove leaf oil. The acid used as an activation was 1.5M sulphuric acid and the surfactant for intercalation was Benzalkonium Chloride (BKC) with concentration variation(0; 0.1; 0.5; 1; and 2%). The result of the reseach showed that the changes of basal spacing d001 for S0-0; Sa-0; Sa-0,1;Sa-0,5; Sa-1; and Sa-2 were 15.15548; 15.40269; 15.20580; 14.62099; 14.77594; and 14.74415 Å respectively. Thesurface area for S0-0; Sa-0; Sa-0,1; Sa-0,5; Sa-1; and Sa-2 were 26.2239; 27.4035; 26.0482; 26.4557; 27.7885; and 26.6809m2/g respectively. The Sa-0,1 adsorbent had the highest surface acidity (1.0135 ± 0.01100 mmol/g). Every gram ofadsorbent Sa-0,1 had the highest adsorption capacity to clarify 20.0 mL clove leaf oil at 120 minutes contact time.After adsorption by Sa-0,1 the clove leaf oil was clearer and contained higher concentration of eugenol than beforeadsorption.
ISOLASI DAN UJI ANTIRADIKAL BEBAS MINYAK ATSIRI PADA DAUN SIRIH (Piper betle Linn) SECARA SPEKTROSKOPI ULTRA VIOLET-TAMPAK I M. Oka Adi Parwata; Wiwik Susanah Rita; Raditya Yoga
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
Publisher : 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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Abstract

Isolation, identification and free radical activities testing of essential oil from Piper betle Linn were carriedout. Around 13,0 mL (12, 37 gram) of yellow essential oil was obtained from 10,0 kg fresh leaves of Piper betleLinn. The oil was then partitioned with MeOH : H2O (7:3), n-hexane and chloroform.Free radical activities testing showed n-hexana fraction was the most active which can reduced 66,27 % ofDPPH for 5 minutes and 89,13 % in 60 minutes. GC-MS analysis revealed that there were 27 peaks. Based on thedata analysis there were only 9 compound, i.e. 4-metil(1-metiletil)-3-sikloheksen-1-ol, 1-metoksi-4(1-propenil)benzene, 4-(2-propenil)fenol/kavicol, 4-alilfenilacetate, Eugenol, Karyofilen, 3-alil-6-metoksifenilasetat, 4-alil-1,2-diasetoksibenzena dan dekahidro-4a-metil-1-metilen-7(1-metiletenil) naftalena.Based on peak’s intensity the oil were dominated by 4 compound i.e. 4-allyl phenyl acetate, 2 methoxy-4-(2 prophenil) fenol/eugenol, 3-allyl-6-methoxy phenyl acetate, 4-(2-prophenyl)-phenol / cavikol.
ISOLASI DAN IDENTIFIKASI SENYAWA ISOFLAVON DARI KACANG KEDELAI (Glycine max) I. A. R. Astiti Asih
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
Publisher : 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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Abstract

Isolation and identification of flavonoid compound from soy bean (Glycine max) have been conducted inthis research. Extraction of 1740.83 g of soy bean powder with methanol yielded 17.82 g yellowish brown of crudemethanol extract. The crude extract was then hydrolysed with 2N HCl. Following partition of hydrolysed productwith n-hexane gave 2.61g of n-hexane extract. Phytochemical testing of n-hexane extract gave positive result forflavonoid compound. The n-hexane extract was then subjected to column chromatography for purification.Identification of fraction which contained flavonoid using UV-Vis showed two band peaks at 312.9 nm dan 268.2nm. Further identification using chemical shift including sodium hydroxide, sodium acetate, sodium acetate:borateacid, aluminium chloride, aluminium chloride-concentrated chloride acid suggested that the compound isolated wasisoflavone without any free hydroxyl group and ortho dihydroxy group at ring A. Thr infra red spectra of isolateindicated the presence of characteristic functional group such as aromatic CH, aliphatic C-H, C=O, aromatic C=C,and C-O
PREPARASI BIODIESEL DARI MINYAK JELANTAH KELAPA SAWIT I W. Suirta
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
Publisher : 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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Abstract

Synthesis of biodiesel from used cooking oil was carried out in two step reactions i.e esterification andtransesterification. The biodiesel obtained was analysed using gas chromatography and mass spectrometer (GC-MS).The quality was determined by comparing its physico chemical properties and compared to the Jerman Standard DINV 51606.The result of GC-MS showed 6 peaks coresponding to six methyl ester(biodiesel): methyl myristate, methylpalmitate, methyl linoleate, methyl oleate, methyl stearat and methyl arachydate. The biodiesel obtained has a densityof (0,8976±0,0003 g/mL), viscosity of (4,53±0,0872 mm/s), acid value of (0,4238±0,0397 mg KOH/g, and iodnumber of (9,3354±0,0288 g iod/100 g sample). There properties were in a good agreement with the standard JermanDIN 51606.

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