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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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SINTESIS PESTISIDA FLUSILAZOL Aldes Lesbani; Hitoshi Kondo; Yoshinori Yamanoi; Hiroshi Nishihara
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 1 Januari 2012
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 (244.901 KB)

Flusilazole pesticide has been synthesized through coupling reaction of organosilica and aryl halide using palladium catalyst in basic condition under argon atmospherie in two reaction steps. The product was characterized using 1H and 13C NMR spectroscopy at 500 MHz and 125 MHz respectively.The results of this research showed that the high yield of colorless oil product was obtained up to 70%. 1H and 13C NMR spectra have six and eight peaks respectively, which indicate the structure of flusilazole.

TOKSISITAS SENYAWA FLAVONOID DARI EKSTRAK ETANOL DAUN DEWANDARU (Eugenia uniflora Linn.) SEBAGAI SKRINING AWAL ANTIKANKER I Made Dira Swantara; Wiwik Susanah Rita; I Made Adi Suardhyana
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 2 Juli 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Flavonoid merupakan senyawa yang dipercaya berpotensi sebagai antikanker. Salah satu tanaman yang mengandung flavonoid adalah tanaman Dewandaru (Eugenia uniflora Linn.). Penelitian ini bertujuan untuk melakukan identifikasi dan uji toksisitas senyawa flavonoid dari ekstrak etanol daun Dewandaru (Eugenia uniflora Linn.) yang berpotensi sebagai antikanker. Ekstraksi dilakukan dengan metode maserasi dan partisi menggunakan n-heksana, kloroform, dan etil asetat. Pemisahan fraksi kloroform dilakukan dengan kromatografi kolom silika gel menggunakan campuran pelarut kloroform : etil asetat (5:1) sebagai fase gerak. Uji toksisitas dilakukan dengan metode Brine Shrimp Lethality Test (BSLT), dan identifikasi dilakukan dengan spektrofotometer IR serta UV-Vis. Ekstraksi 1000 g serbuk daun Dewandaru dengan 10 L etanol 70% menghasilkan 273 g ekstrak pekat etanol dan proses partisi berturut – turut menghasilkan 30,14 g ekstrak pekat air, 5,58 g ekstrak pekat n-heksana, 20,57 g ekstrak pekat kloroform, dan 22,45 g ekstrak pekat etil asetat. Uji fitokimia menunjukkan bahwa keempat ekstrak positif mengandung flavonoid, namun ekstrak kloroform memiliki efek toksik yang paling tinggi. Pemisahan dengan kromatografi kolom menghasilkan 3 kelompok fraksi (Fa, Fb, dan Fc). Fraksi Fc positif flavonoid dan relatif murni serta paling toksik terhadap larva udang Artemia salina Leach dengan LC50 sebesar 63,10 ppm, isolat selanjutnya diidentifikasi dengan spektrofotometer IR serta UV-Vis. Hasil identifikasi menunjukkan isolat (Fc) merupakan senyawa golongan flavonoid jenis dihidroflavonol yang mempunyai gugus fungsi OH terikat, CH alifatik, C = O, C = C aromatik, C – O dan CH aromatik, serta terdapat gugus hidroksi pada atom C-3, C-5, dan C-7, serta mempunyai gugus orto dihidroksi pada cincin B dan memberikan serapan pada panjang gelombang (?max) 281,0 dan 315,0 nm.

AKTIVITAS ANTIBAKTERI EKSTRAK KULIT PISANG KEPOK KUNING (Musa paradisiaca L.) TERHADAP BAKTERI Staphylococcus aureus DAN Escherichia coli SERTA PENENTUAN TOTAL FLAVONOID DAN FENOL DALAM FRAKSI AKTIF N. K. D. M.S. Wahyuni; W. S. Rita; I. A. R. A. Asih
Jurnal Kimia (Journal of Chemistry) Vol.13 No.1 Januari 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Peel of yellow kepok banana (Musa paradisiaca L). has not been used optimally, while the peel can be used as an infection medicine The aim of this study was to reveal the activity of kepok yellow banana peel extract against Staphylococcus aureus and Escherichia coli and to determine the total content of flavonoids and phenols in active extract.. Extraction peel of yellow kepok banana was done by maceration and partition method, anti bacterial activity was assayed by wells diffusion method, determination total flavonoid and phenolic contents was done by UV-Vis Spectrophotometer. Maceration of 1 kg peel of yellow banana produced 80.9173 g of crude ethanol extract. The partition of 20 g crude ethanol extract produced 1,3758 g of n-hexane extract, 3,5818 g of ethyl acetate extract, and 1,0762 g of n-butanol extract. Anti bacterial test result showed that the 10% n-butanol extract was active towards S.aureus and E.coli with strong activity compared with ethanol, ethyl acetate, and n-hexane extract. MIC value was 0.5% for S.aureus and 0,2% for E.coli bacteria. The contain total flavonoid and phenol in n-butanol extract respectively were 0.06% and 0.15%.

PEMANFAATAN BATU PADAS JENIS LADGESTONE TERAKTIVASI NaOH DAN TERSALUT Fe2O3 SEBAGAI ADSORBEN LARUTAN BENZENA I Nengah Simpen; I Made Sutha Negara; Ida Ayu Agung Pradnyani
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 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 (141.374 KB)

This paper describes the adsorption of benzene by ledgestone which was activated with 4 M NaOH and coated with Fe2O3. The proportions of ledgestone and the coating used were of 10 : 1, 50 : 1, and 100 : 1. The aim of this study was to find out the ability of the stone in decreasing benzene concentration in solution. The study included the determination of surface acidity by acid-base titration, characterization of the ledgestone specific surface area by the method of blue methylene, determination of equilibration time of the stone in adsorbing benzene and determination of adsorption capacity of the stone referred to Freundlich isotherm adsorption by the application of gas chromatography.The result showed that the highest surface acidity of 0.2980 mmol/g was given by the ledgestone that was activated with 4 M NaOH and coated with Fe2O3 with the proportion of 10 : 1 and washed by aquadest. This ledgestone also showed the highest adsorption capacity which was 44.1286 ?g/g. The control ledgestone had specific surface area of 35.880 m2/g. The ledgestone that was activated with 4 M NaOH and coated with Fe2O3 resulted in higher adsorption capacity to benzene than the control ledgestone did.

IDENTIFIKASI SENYAWA ANTIBAKTERI PADA DAUN KECAPI (Sandoricum koetjape (Burm.f.) I M. Dira Swantara; Yenni Ciawi
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 2 Juli 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 (1166.082 KB)

Identification of antibacterial compound for Micrococcus luteus dan Eschericia coli bacteri have beenconducted to kecapi leaf extract (Sandoricum koetjape (Burm.f.)). Extraction of that compounds was carried out bymaseration methods using 70% etanol. Separation of the fraction by liquid-liquid partition (n-hexane, ethyl acetateand chloroform) and two step column chromatographic method using silicagel as stationary phase and ethyl acetate –chloroform (3:7;2,5:7,5; dan 2:8) as first eluent and ethyl acetate – chloroform (2:8; 1,5:8,5; dan 1:9) as secondeluent. The active fraction (2.1 and 2.3 fraction) were identified by gas chromatography-mass spectroscopy (GCMS).The 2.1 fraction contain 3 compound which are heksil n-valerate (C11H22O2); 2,3-dihidrobenzofurane (C8H8O);and 2,6-dimetoxy fenol (C8H10O3). The 2.3 fraction contain 2 compound which are ester dioctilehexadioat(C22H42O4) with M+ = 370 and basic peak equal to 129 and 3,5-di-tert-buthyl-4-hydroxy-toluene (C15H24O).

UJI AKTIVITAS PROTEASE GETAH LABU SIAM DAN TALAS SERTA PERBANDINGANNYA TERHADAP GETAH PEPAYA Ketut Ratnayani; A. A. Ayu Septri Juwarni; A. A. I. A. Mayun Laksmiwati; I G. A. Kunti Sri Panca Dewi
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

Papaya (Carica papaya L.) latex has been used commercially as a protease (papain) sources. However it can cause itchy on the skin. Some other latex plants that can cause itchy were taro and chayote. They were strongly predicted to have protease components. This research aimed to determine protease activity of plants latex of taro (Xantosoma sagittifolium (L.) Schott and chayote (Sechium edule (Jacq.) Sw.). The protease activity of these latex then were compared to the protease activity of papaya latex. Latex of papaya and taro were collected from fruit, while latex of chayote was collected from corm. The assay of protease activity was based on spectrofotomeric methods (Anson’s method) using casein as substrat. The result of protease activity assay showed that taro and chayote latex positively contains protease but their protease activities were less than papaya latex which were 0.0123 U/mL and 0.0264 U/mL respectively. It can be concluded that taro and chayote latex were potentially used as alternative protease sources. The protease activity ratio of taro latex to papaya was 1: 74.75 and the ratio of chayote latex to papaya latex was 1: 34.82.

IDENTIFIKASI GOLONGAN SENYAWA AKTIF ANTIMAKAN DARI DAUN TENGGULUN (Protium javanicum Burm. F.) TERHADAP LARVA Epilachna sparsa L M. G. Agus Mandana; Ni M. Puspawati; Sri Rahayu Santi
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Protium is the main genusl in the family of Burseraceae which has been used traditionally as medicine, cosmetic as well as insecticide. This research aimed to isolate and identify antifeedant active compounds from leaf of Protium javanicum Burm, F which is locally known as tenggulun. Epilachna sparsa (E.sparsa) larvae were used as bioindicator for antifeedant activity assay. The assay was performed both on crude extract, fractions, and isolate. Dried leaf powder of tenggulun (1000 g) was extracted with methanol to yield 20.89 g dark green extract. This extract showed 71.61% antifeedant activity at 0.1% (b/v). This active extract was then fractionated into n-hexane, chloroform and water fractions. The chloroform fraction was the most active which give 89.62% activity at 0.1% (b/v) compared to n-hexane (36.83%), and water fractions (1.96 %). Purification of chloroform fraction was done using silica gel column chromatography with n-hexane : chloroform (3:4) as eluent and three groups of fractions (isolates) were obtained. The most active isolate which showed 70.53% antifeedant activity at 10 ppm was found relatively pure, therefore it was then identified. Based on phytochemical reaction, analysis of infrared spectra and ultraviolet-visible spectra, the antifeedant active isolate was identified as triterpenoid class of compounds which have functional group such as OH, CH3, CH2, C=O, C=C and ?max at 245 and 416 nm.

KAPASITAS ANTIOKSIDAN DAN KADAR FENOLIK TOTAL DALAM SARI BUAH MENGKUDU TERFERMENTASI Anak Agung Sagung Desy Dwi Martayani Martayani; Ni Made Suaniti; Wahyu Dwijani Sulihingtyas
Jurnal Kimia (Journal of Chemistry) Vol. 11. No.2 Juli 2017
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Penelitian ini tentang pengujian kapasitas antioksidan dan kandungan fenolik total sari buah mengkudu terfermentasi dengan penambahan sari jahe dan gula merah. Tujuan penelitian ini adalah untuk menganalisis perubahan kapasitas antioksidan dan kandungan fenolik total dalam sari buah mengkudu sebelum dan setelah difermentasi selama beberapa hari. Kapasitas antioksidan dalam sari buah mengkudu semakin kecil setelah fermentasi yaitu dari 38,10 mgGAE/100 g (sebelum ditambahkan sari jahe, gula merah, tanpa difermentasi) menjadi 30,18; 28,68; dan 23,97 mgGAE/100 g berturut-turut setelah 2, 4, dan 6 hari fermentasi. Penurunan juga terjadi pada kadar fenolik total yaitu dari 54,46 menjadi 45,54; 39,39; dan 34,82 mgGAE/100 g.

STEROIDS FROM THE SUPER RED DRAGON FRUIT (Hylocereus costaricensis) H. Supriadi; S. Salam; F. F. Abdullah; A. Subarnas; R. Sidik; U. Supratman; Y. Shiono
Jurnal Kimia (Journal of Chemistry) Vol.13 No.2 Juli 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Two steroids compounds, 7?-Hydoxy ?-sitosterol (1) and ?-sitosterol (2), have been isolated from ethyl acetate extract of the fresh Super Red Dragon Fruit (Hylocereus costaricensis).The chemical structure of compounds 1 and 2 were identified by spectroscopic data including UV, IR, NMR-1D, NMR-2D and mass as well as by comparing with previously reported spectral data. Compounds 1 and 2 were reported for the first time from dragon fruit (Hylocereus costaricensis). Keywords: 7?-Hydoxy ?-sitosterol, ?-sitosterol, Hylocereus costaricensis, steroids.

EKSTRAKSI ZAT WARNA ALAMI CAMPURAN BIJI PINANG, DAUN SIRIH, GAMBIR DAN PENGARUH PENAMBAHAN KMnO4 TERHADAP PEWARNAAN KAYU JENIS ALBASIA N. W. Bogoriani
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 (124.468 KB)

The research about extraction of natural dies from the mixtures of areca nut, betel leaf, gambier, and theeffect of addition of KMnO4 towards surface coloration of albasia wood (Paraserianthes falcataria) was carried out.The extraction of mixture of natural dye was conducted by heating in water for two hours. 10,00 gram of eachsamples of betel leaf, areca nut, and gambier were refluxed and resulted in 28,60%, 40,10%, and 30,20%respectively. According to fitochemical test, the betel leaf extract contain flavonoid, tannin, and carotenoid, whereasthe areca nut and gambier extracts contain flavonoid and tannin.The optimum mass ratio and mass of KMnO4 for coloration were resulted in optimum mass 10:10:5 and0,25 gram respectively. This showed that the addition of KMnO4 strengthen the bond between dye and wood fiberand sharpen the resulted color. This was proven by color endurance test by soaking the object in 1% of detergentwater for 15 minutes. The dye without KMnO4 was easy to fade out, whereas the dye with KMnO4 was moreresistant. The resulted color varies from reddish brown, brown, to deep brown.

Page 37 of 52 | Total Record : 518

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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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