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Jurnal Kimia (Journal of Chemistry)

jchem
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Published by Universitas Udayana

ISSN : 19079850 EISSN : 25992740 DOI : 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 518 Documents

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AMPLIFIKASI DAN IDENTIFIKASI MUTASI PADA FRAGMEN 0,5 KB GEN rpoB ISOLAT 134 Mycobacterium tuberculosis MULTIDRUG RESISTANT DENGAN METODE NESTED POLYMERASE CHAIN REACTION Made Dharmesti Wijaya; I Nengah Wirajana; Sagung Chandra Yowani
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 2 Juli 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Research has been conducted to amplify and identify mutations in the rpoB gene fragment, 0,5 kb, from the isolate 134 Mycobacterium tuberculosis multidrug resistance (MDR). Amplification was performed using the method nested polymerase chain reaction (nested PCR) while sequencing was conducted in one direction using forward inner primer. Nucleotide sequence obtained was translated into amino acids using MEGA4 program. Amplification of M.tuberculosis rpoB gene fragment, 0,5 kb, was successfully carried out and sequenced. Alignment result by using MEGA4 program showed that there had been missense mutations in the rpoB gene. It had two amino acids changes to rpoB protein, they were glutamic acid to aspartic acid at codon 418 and glutamine to arginine at codon 510.

SENYAWA ANTIMAKAN TRITERPENOID ALDEHID DALAM BIJI SIRSAK (Anonna muricata Linn) Sri Rahayu Santi
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 2 Juli 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.664 KB)

Isolation and identification of active antifeedant compounds from sirsak seed (Anonna muricata Linn) has been carried out. As much as 13 g of concentrated methanol extract was resulted from 1.9 kg dried sirsak seed that was macerated using methanol. Further, this extract was partitioned with n-hexane to obtained 2 concentrated extracts in n-hexane and methanol. The result of antifeedant test of both extracts showed that n-hexane extract was more active than methanol extract.Separations of n-hexane extract using column chromatography (stationary phase: silica gel 60 and mobile phase: ethylacetate-chloroform 5:2) resulted in three fractions with FA fraction as the most active antifeedant (84,6% at 1600 ppm concentration).The identification using phytochemical test and spectrophotometer analysis showed that the isolate (FA. fraction) was triterpenoid aldehyde compound which absorbed at 227.6 nm, 275.1 nm and it had functional groups such as C-H stretching vinyl (3008.7 cm-1), two bands C-H streching aliphatic (2923.9 and 2854.5 cm-1) showing aldehyde group, and carbonyl group C=O (1743.5-1712,7 cm-1).

IDENTIFIKASI DAN UJI AKTIVITAS SENYAWA FLAVONOID DARI EKSTRAK DAUN TREMBESI (Albizia saman (Jacq.) Merr) SEBAGAI ANTIBAKTERI Escherichia coli I Kadek Pater Suteja; Wiwik Susanah Rita; I Wayan Gede Gunawan
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 1 Januari 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Identification of flavonoid from the leaves of rain tree (Albizia saman (Jacq.) Merr) and its antibacterial activity test against Escherichia coli (E.coli) has been performed. This research aims to determine the type of flavonoid in rain tree leaves and its antibacterial activity against E. coli. Extraction was done by maceration and partition methods, separation was achieved by column chromatography, antibacterial activity was tested by disk diffussion method, and the identification was done by Ultraviolet-visible (UV-vis) and Infrared spectrophotometry. Extraction of 1 kg of rain tree powder with 5 L ethanol produced 73.38 g of concentrated ethanol extract. The partition process produced 26,34 g of n-hexane, 8,12 g of ethylacetate, 19,37 g n-butanol, and 12,56 g of water extracts. Phytochemical test of the extracts showed that the n-butanol extract contained flavonoids. Antibacterial activity of n-butanol extract towards E.coli showed a medium activity with a diameter inhibition of 6.3 mm. MIC value ??was 2% (w/v) with a diameter inhibition of 1 mm. Separation using column chromatography with the eluent of n-butanol: methanol: chloroform (5: 3: 2) obtained four isolates but only one isolate (isolate B with Rf 0.58) which contained flavonoids. Analysis with infrared spectroscopy showed that the isolate B contained functional groups of OH, C-OH, aliphatic CH, C = O ketones, C = C aromatic, COC ether, and aromatic CH. Analysis with UV-Vis spectrophotometer indicated that isolate B is isoflavon compound with a hydroxy groups at C-5 and C-7. The isolate was relatively pure by TLC. The isolate showed a low antibacterial activity.

SINTESIS DAN KARAKTERISASI ABU SEKAM PADI-LITIUM OKSIDA SERTA UJI AKTIVITAS KATALITIKNYA DALAM PEMBUATAN BIODIESEL DARI MINYAK BIJI MALAPARI I N. Simpen; N. L. Arpiwi; M. Indra Dwitama
Jurnal Kimia (Journal of Chemistry) Vol.12 No.2 Juli 2018
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Penelitian ini dilakukan untuk menentukan sifat kimia fisik dari katalis abu sekam padi (ASP) termodifikasi litium oksida, optimasi suhu kalsinasi dalam sintesis katalis, serta menguji aktivitas katalitiknya dalam pembuatan biodiesel dari minyak biji malapari (Pongamia pinnata L.). Pembuatan katalis heterogen telah berhasil dilakukan melalui modifikasi ASP dengan litium karbonat. Modifikasi ASP dilakukan secara metode keramik melalui variasi suhu kalsinasi 700oC (Li-ASP700), 800oC (Li-ASP800), dan 900oC (Li-ASP900). Katalis heterogen yang diperoleh, dikarakterisasi, dan diuji aktivitasnya untuk pembuatan biodiesel dari minyak biji malapari. Karakterisasi katalis heterogen meliputi keasaman dan kebasaan permukaan, Brunauer, Emmett dan Teller (BET) surface area, gugus fungsional, dan rasio Li/Si. Hasil penelitian menunjukkan bahwa keasaman permukaan katalis Li-ASP700, Li-ASP800, dan Li-ASP900 semuanya adalah 0 mmol/g. Sementara, kebasaan permukaan tertinggi, surface area tertinggi, dan rasio Li/Si tertinggi diperoleh pada katalis Li-ASP700 berturut-turut yaitu 22,4883 mmol/g, 1,251 m2/g, dan 19,24. Oleh karena itu, suhu kalsinasi optimum dalam pembuatan katalis tersebut adalah 700oC. Katalis heterogen Li-ASP700 mampu mengkonversi minyak biji malapari menjadi biodiesel optimum pada persentase katalis 3% (b/b) dengan yield 87,29%. Kata kunci: abu sekam padi termodifikasi litium oksida, katalis heterogen, minyak biji malapari, biodiesel

DEGRADASI KOLESTEROL DAN KOPROSTANOL DALAM SEDIMEN SUNGAI Iryanti Eka Suprihatin
Jurnal Kimia (Journal of Chemistry) Vol. 4, No. 2 Juli 2010
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (90.968 KB)

Cholesterol and other steroid compounds like coprostanol, epicoprostanol, have been used as sourceindicator for fecal pollution in aquatic environments. This is because of the unique steroid composition of animalfeces. To determine the source of fecal pollution, the ratios of steroid compounds in the sample are used. Thus anyreaction or changes to any steroid compound in the environment will affect the determination. In this paper a studyon the interconversion of cholesterol and coprostanol in river sediments is reported. The study suggests that there isno such changes that any steroid compounds detected in a sediment sample will show their primary sources. Thisimplies that the composition or ratio of the compounds can be used as source indicator for fecal pollution. The studyalso found that both cholesterol and coprostanol degradation are first order with rate constants of0,063[kolesterol]mgL-1day-1 and 0.045[kop]t mgL-1day-1 respectively.

PENGARUH KONSENTRASI ASAM FOSFAT DAN BERAT SEMEN PUTIH SEBAGAI ADSORBEN DALAM PEMURNIAN CRUDE GLISEROL Lestari Lestari; Made Arsa; I Wayan Suirta
Jurnal Kimia (Journal of Chemistry) Vol. 9, No. 2 Juli 2015
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The research of purification process of crude glycerol using phosphoric acid and white cement as adsorbent has been carried out. The aim of this research was to study the effect of phosphoric acid concentration and weight of white cement used as adsorbent in the purification process to the purity of glycerol. The research was done by the addition phosphoric acid in crude glycerol followed by adsorption with white cement. Glycerol quality parameters were determined by assesment of glycerol density, viscosity, and by comparing its GC-MS spectra to GC-MS spectra of standard glycerol. The result showed that purification process of glycerol using 5 % phosphoric acid and 5 grams of white cement gave the highest level of glycerol which was 84.20%. The density of purified glycerol obtained in this research was 1.2595 ± 3.1622 x 10-5 g/mL, the viscosity was 1.4372 ± 3.8333 x 10-3 Pa.s, and the GC_MS spectra purified glycerol showed similar fragmentation pattern and retention time with the glycerol standard.

PERBEDAAN KARAKTERISASI DAN SKRINING FITOKIMIA EKSTRAK ETANOL KULIT BUAH MANGGIS (Garcinia mangsotana Linn) YANG DIPEROLEH DARI KABUPATEN TABANAN DAN KABUPATEN KARANGASEM, PROVINSI BALI Ni Putu Chintya Sandra Bhuana; Ni Putu Ayu Dewi Wijayanti; I G. N. Agung Dewantara Putra
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 2 Juli 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Mangosteen peel has been studied to contain many chemical constituents. However, differences in the geographical location of a plant can result in variations in the content of a plant metabolites. This study aimed to determine differences in the characteristics of the extract as well as content owned chemical peel ethanol extract of mangosteen (Garcinia mangostana L.) were obtained from Tabanan and Karangasem regency, Bali province. This study is experimental designed. Extraction process used the method of maceration with 70% ethanol. Organoleptic characterization of the extract was conducted. Water content, content of water-soluble extract and ethanol soluble extract were also determined. Phytochemical screening of the extract covered the content of alkaloids, glycosides, flavonoids, saponins, phenolic, and steroids / terpenoids. The results showed that the ethanol extract of mangosteen peel taken from Tabanan regency contain saponins, alkaloids, flavonoids, phenolics, terpenoids, and glycosides, while the ethanol extract of mangosteen rind taken from Karangasem regency contain saponins, alkaloids, flavonoids, phenolic, terpenoids. The ethanol extract of mangosteen peel taken from Tabanan regency has a different chemical content with ethanol extract of mangosteen peel taken from Karangasem regency.

PERBANDINGAN UJI AKTIVITAS ANTIBAKTERI MINYAK ATSIRI DAUN, TANGKAI BUNGA DAN BUNGA CENGKEH BALI (Syzygium aromaticum L.) TERHADAP BAKTERI Propionibacterium acne DENGAN METODE DIFUSI DISK I. P. S. T. Lova; W. A. Wijaya; N. L. P. V. Paramita; A. A. R. Y. Putra
Jurnal Kimia (Journal of Chemistry) Vol. 12 No.1 Januari 2018
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Propionibacterium acnes adalah bakteri anaerob gram positif yang merupakan bakteri paling dominan pada lesi jerawat. Minyak atsiri telah dibuktikan memiliki aktivitas antibakteri gram positif maupun bakteri gram negatif. Selain bunga cengkeh, minyak atsiri juga dapat diperoleh dari bagian tangkai bunga dan daun dari tanaman cengkeh. Oleh karena pemanfaatan bunga cengkeh masih terhitung mahal, maka pada penelitian ini peneliti ingin melihat potensi aktivitas antibakteri minyak atsiri dari tangkai bunga dan daun cengkeh. Tujuan penelitian ini adalah untuk membandingkan aktivitas antibakteri minyak atsiri dari bagian bunga, tangkai bunga dan daun cengkeh terhadap bakteri P.acnes. Minyak atsiri dari bunga, tangkai bunga dan daun diperoleh dengan menggunakan metode destilasi air. Konsentrasi larutan uji yang digunakan 200 ?l/mL dengan metode uji difusi disk, kontrol negatif etanol 96% v/v, kontrol positif doksisiklin 30?g/disk, media uji MHA, dan suspensi bakteri P. acnes sebesar 0,5 McFarland. Aktivitas antibakteri ditentukan berdasarkan diameter zona hambat yaitu daerah bening diantara latar keruh setelah diinkubasi selama 24 jam. Analisis data dilakukan dengan menggunakan analisis deksriptif untuk melihat klasifikasi respon hambatan berdasarkan NCCLS dan analisis statistik menggunakan ANOVA one way. Aktivitas antibakteri minyak atsiri bunga, tangkai bunga dan daun cengkeh terhadap bakteri P. acnes berbeda signifikan secara statistik dengan taraf kepercayaan >95%. Minyak atsiri bunga cengkeh menghasilkan aktivitas antibakteri terbesar yaitu 25,85 mm - 26,75 mm sedangkan minyak atsiri tangkai bunga menghasilkan aktivitas dengan zona hambat 20,60 mm - 21,20 mm dan minyak atsiri daun cengkeh menghasilkan zona hambat sebesar 18,04 mm - 18,58 mm. Hal ini membuktikan bahwa minyak atsiri dari bunga cengkeh memiliki aktivitas yang paling baik terhadap P.acnes s dibandingkan dengan minyak atsiri dari tangkai bunga dan daun cengkeh. Dengan demikian, minyak atsiri dari tangkai bunga dan daun cengkeh belum sebanding dengan yang berasal dari bunga cengkeh apabila dimanfaatkan sebagai anti bakteri P. Acnes.

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (88.672 KB)

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

EFEK BERBAGAI MINYAK PADA METABOLISME KOLESTEROL TERHADAP TIKUS WISTAR Ni Wayan Bogoriani; Ketut Ratnayani
Jurnal Kimia (Journal of Chemistry) Vol. 9, no. 1 Januari 2015
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

This study was conducted over 10 weeks using several types of oils containing unsaturated fatty acids, saturated fatty acids and trans fatty acids, namely coconut oil, bulk oil, used cooking oil and pig fat. Animal tests were used to determine the effects of various oils on the metabolism of cholesterol in wistar rats. The study design was a randomized post-test only control group design, conducted in mice. Twenty-five rats were divided into five groups: control, treatment 1, treatment 2, treatment 3 and treatment 4, each of 5 rats. The control group was given standard diet only, treatment- 1 standard food and coconut oil 2.5 ml / day, treatment-2 standard food and bulk oil 2.5 ml / day, treatment-3 standard food and used cooking oil 2.5 ml / day and the treatment-4 standard food and pig fat 2.5 ml / day. After 10 weeks of treatment their blood plasm samples were taken for examination for total cholesterol, LDL, HDL, triglycerides, VLDL cholesterol, and the ratio of total / HDL. The results showed an increase in total cholesterol, LDL, triglycerides, VLDL, the ratio of total cholesterol / HDL and a decrease in blood plasm HDL cholesterol significantly (p <0.05) in the treatment of waste cooking oil compared with the control and other treatments. Based on these results it can be concluded that the used cooking oil has the potential to cause oxidative stress and inflamation which is a risk factor for atherosclerosis formation.

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Contact Name Ni Putu Diantariani

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Editorial Address Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

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Contact Name
Ni Putu Diantariani

Contact Email
jurnalkimia@unud.ac.id

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+628123640424

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jurnalkimia@unud.ac.id

Editorial Address
Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

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Kota denpasar,

Bali

INDONESIA