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Jurnal Kimia (Journal of Chemistry)
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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PENELUSURAN SENYAWA SITOTOKSIK PADA KULIT BIJI NYAMPLUNG (Calophyllum inophyllum L.) DAN KEMUNGKINAN KORELASINYA SEBAGAI ANTIKANKER Sri Rahayu Santi
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 (200.082 KB)

Abstract

Isolation and identification of active toxic compounds from nyamplung skin bean (Calophyllum inophyllumL). has been carried out. As much as 12,43 g of concentrated methanol extract was resulted from 1.0 kg dry powdernyamplung skin bean that was macerated using methanol. This extract was dissolved into methanol-water (7:3) andthen partitioned with n-hexane and chloroform respectively. The result of toxicity test to both extract showed thatchloroform extract was the most active toxic with LC50 = 239,88 ppmSeparation of chloroform extract using preparative thin layer chromatography (TLC) resulted in F5 fractionsthat was white yellowish as much as 52 mg and LC50 = 151,36 ppm. Infra red and UV-vis spectroscopy wereemployed in order to identify the F5 fraction. The result of identification showed that isolate was aldehidetriterpenoide compounds which had functional group like –OH (3429 cm-1), -CH aldehyde (2922,9 and 2852,9 cm-1),-CºC- (2360 cm-1), -C=O (1742,7 cm-1), -C=C- alkene(1637,0 cm-1), -CH3, -CH2 (1542,9, 1480,7, 1401,9 cm-1), -CO-(1090 cm-1), It showed absorbed at broad peaks at l(nm) (CHCl3): 254, 282, and 342,7.
ANALISIS FENOL DALAM URIN PEKERJA SALAH SATU STASIUN PENGISIAN BAHAN BAKAR UMUM DI KOTA DENPASAR Abdul Rahim; Ni Made Suaniti; Wiwik Susanah Rita
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (58.984 KB) | DOI: 10.24843/JCHEM.2015.v09.i01.p17

Abstract

Phenol is a compound produced by the metabolism of benzene contained in the fuel. The purpose of this study was to determine the content of phenol in the urine of workers at a Public Gas Station in Denpasar. The method used in this analysis was gas chromatography – FID (GC-FID). Urine was taken 3 times with an interval of 7 days from 3 workers. Control was taken from a non-gas station worker. Standard solutions used were mixtures of benzene and phenol with concentration of 1.25, 2.50, 5, and 10 ppm. Phenol calibration curve equation was y = 2.94x ??+ 0.23 with a correlation coefficient (r) = 0.9997. The concentration of phenol of samples varied ranging from 0.51 ppm to 1.38 ppm, while the phenol content in gasoline alone was 0.66 ppm. Phenol levels in the urines were still under normal value which is 25 ppm, while the level of benzene exposure was still under the standard concentration of 10 ppm.
PENURUNAN ANGKA ASAM PADA MINYAK JELANTAH Primata Mardina; Erlyta Faradina; Netty Setiawati
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 2 Juli 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 (124.76 KB)

Abstract

Acid number expresses free fatty acid content that has effect on quality of oil and fat product. High acid number in resulted from hydrolysis process that occurred during frying. Acid number could be reduced by adsorption. The objective of this research was to reduce acid number from waste cooking oil using adsorption process. The activated carbon from coconut shell was used as adsorbent. A specific amount of adsorbent was added into 150 grams of waste cooking oil, and the process was carried out with certain range of operation time. Stirring speed and temperature of adsorption process were maintained constant at 500 rpm and 27oC. The result showed free fatty acid adsorption or reduction in acid number efficiencies increase with higher adsorbent doses. Based on the result, the reduction in acid number of waste cooking oil using activated coconut shell carbon followed the Freundlich-type isotherms.
FOTODEGRADASI ZAT WARNA REMAZOL BRILLIANT BLUE DENGAN BENTONIT TERIMPREGNASI Fe2O3 Made Arie Kusuma Dewi; Iryanti Eka Suprihatin; James - Sibarani
Jurnal Kimia (Journal of Chemistry) Vol. 11. No. 1 Januari 2017
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 (223.433 KB) | DOI: 10.24843/JCHEM.2017.v11.i01.p13

Abstract

Telah dilakukan penelitian mengenai fotodegradasi zat warna remazol brilliant blue dengan fotokatalis Fe2O3-bentonit dan sinar UV. Penelitian ini bertujuan untuk mengetahui konsentrasi katalis optimum, pH optimum larutan, waktu penyinaran optimum dengan sinar UV, dan efektivitas fotodegradasi zat warna remazol brilliant blue. Penentuan kondisi optimum fotodegradasi remazol brilliant blue dilakukan dengan variasi konsentrasi komposit Fe2O3-bentonit sebesar 50-300 mg untuk 25 mL larutan (b/v). Variasi pH larutan yang diteliti sebesar 4,0-10,0 dan variasi waktu penyinaran selama 1-6 jam. Efektivitas proses fotodegradasi ditentukan dengan memvariasikan konsentrasi larutan yaitu 50-500 ppm. Hasil penelitian menunjukkan bahwa kondisi optimum proses fotodegradasi remazol brilliant blue memerlukan 8 g/L fotokatalis Fe2O3-bentonit, pH larutan 6, dan waktu penyinaran dengan sinar UV selama 3 jam. Fotokatalis Fe2O3-bentonit pada kondisi optimumnya efektif untuk mendegradasi larutan remazol brilliant blue pada konsentrasi rendah
LAJU HIDROLISIS HEROIN DALAM AIR DAN PLASMA I M. A. G. Wirasuta; M. A. Ningtyas; E. I. Setyawan
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (135.05 KB) | DOI: 10.24843/JCHEM.2019.v13.i02.p11

Abstract

Heroine is hydrolyzed spontaneously in water and plasma. This will influence the determination, especially on the drug profiling. Spectrophotodensitometry has been used to analyze drug profiling of illicit heroine. This article reports the AL-TLC separation of heroine, 6-monoacetylmorphine (6-MAM), morphine, acetyl codeine, and the heroine hydrolysis in water and plasma. Heroin, 6-MAM, morphine, and acetyl codeine can be well-separated by mobile phase of toluene:siclohexane:diethyl amine (75:15:10, v/v). The limit of detection was 165.16 ng/spot and the limit of quantification was 550.55 ng/spot. Heroine was hydrolyzed in water and plasma under first order reaction. The rate of reaction was 0.55 min-1 in water with the half time reaction of 12.47 minutes. On the other hand the hydrolysis rate in plasma was slower with the half time of 16 minutes. Keywords : hydrolysis, heroin, water, TLC-spectrophotodensitometer
ISOLASI DAN IDENTIFIKASI SENYAWA AKTIF LARVASIDA DARI BIJI MIMBA (Azadirachta indika A. Juss) TERHADAP LARVA NYAMUK DEMAM BERDARAH (Aedes aegypti) I W. Suirta; N. M Puspawati; N. K. Gumiati
Jurnal Kimia (Journal of Chemistry) Vol. 1, No. 2 Juli 2007
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 (354.573 KB)

Abstract

Isolation and identification of larvicidal active compounds towards Aedes aegypti from Mimba seed havebeen conducted. One kilogram dry powder of Mimba seed was extracted with ethanol at room temperature.Evaporation of ethanol gave 30 g of crude ethanol extract which showed activity against Aedes aegypti (LC50282.29). This extract was dissolved into methanol-water (7:3) and was then partitioned with n-hexane, chloroformand ethyl acetate respectively. The three extracts obtained i.e. n-hexane, chloroform and ethyl acetate were showedtheir activity against Aedes aegypti in which the-n-hexane extract was the most active with LC50 of 143.97.Therefore the n-hexane extract was further purified using silica gel column chromatography with chloroform:nhexane(9:1) as eluent. Three fractions was obtained i.e. F1, F2 and F3 and they were all active against Aedes aegyptiwith LC50 78.45, LC50 113.54 and LC50 58.70 respectively. It can be seen that F3 was the most active fractions butfrom TLC result, F1 showed the relatively pure compounds since it only gave one spot. Therefore F1 was furtheridentified using pyhtochemical testing, Uv-Vis, infrared and GC-MS. It was found that the larvicidal activecompounds F1 was belong to carboxylic acids groups,with l max 290.1 having functional groups such as methyl,methylene and carbonil. Identification using GC-MS indicated that the larvicidal active compounds F1 was assumedto be a combination of 7 compounds derived from carboxylic acids including hexa-decanoic acid, etil-hexadecanoate,oleic acid, etyl-oleate ester, octadecanoic acid, etyl-octadecanoate and dioctyl-hexadioate.
PEMANFAATAN TEH KOMBUCHA SEBAGAI OBAT HIPERURISEMIA MELALUI PENURUNAN KADAR ASAM URAT DAN MALONDIALDEHID Ni Luh Putu Kartika Mardiani; Ida Bagus Putra Manuaba; I Wayan Suirta
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.479 KB) | DOI: 10.24843/JCHEM.2014.v08.i02.p03

Abstract

Research has been conducted to determine the decrease in uric acid levels and malondialdehyde (MDA) of rats hyperuricemia after being given kombucha tea. The research was carried out with the draft post-test control group design. Kombucha tea with various fermentation time of 4, 8 and 12 days were given to hyperuricemia rats with doses of 10 mL/kg body weight and 40 mL/kg body weight. The results showed that kombucha tea can lower uric acid levels and MDA with the most significant decrease showed by the 8 day fermented kombucha tea with a dose of 40 mL/kg body weight. The decreases were 2.00±0.09 mg/dL and 1.68±0,34 umol/L respectively.
PEMBERIAN MINYAK IKAN LEMURU (Sardinella longiceps) SEBAGAI ANTI DISLIPIDEMIA MELALUI PENINGKATAN HDL PADA TIKUS WISTAR Sri Wahjuni
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

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Abstract

Changes in consumption behaviour to instant food can cause various health problems, such as obesity, dislipidemia, and atheroschlerosis. A study was conducted to investigate sardinella longiceps oil as anti dislipidemia through increasing HDL-C levels.This is a true experimental with randomized pre and posttest control group designs, emplyoying 50 Wistar rats grouped into five groups, i.e. control group (0% fish oil), treatment 1 group (10% fish oil), treatment 2 group (15% fish oil), treatment 3 group (20% fish oil), and treatment 4 group (25% sardinella longiceps oil). This research observed that intake of 20% sardinella longiceps oil resulted in the higest significant increase of HDL-C of 22.78 % (from 55.97 ±1.25 to 68.72 ± 6.25 mg/dL) for dislipidemia study. Therefore, it can be concluded that intake of sardinella longiceps oil in Wistar rat acts as anti dislipidemia by increasing the HDL-C levels. Further research is required to determine whether the application of sardinella longiceps on human will result in a simillar way, as anti inflammation and anti dislipidemia.
FOTODEGRADASI ZAT WARNA TEKSTIL METHYLENE BLUE DAN CONGO RED MENGGUNAKAN KOMPOSIT ZnO-AA DAN SINAR UV Ni Putu Diantariani; Iryanti Eka Suprihatin; Ida Ayu Gede Widihati
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (162.956 KB) | DOI: 10.24843/JCHEM.2016.v10.i01.p18

Abstract

Research on  photodegradation of textile dyes  of methylene blue (MB) and congo red (CR) using ZnO-Activated Carbon composite and ultraviolet (UV) light has been done. This research included synthesis zinc oxide (ZnO), synthesis ZnO-Activated Carbon, and the application of composite to degrade textile dyes of MB and CR. In this research studied the effect of pH, concentration and time of UV radiation  towards photodegradation percentages  of dyes. Then it determined the rate and the effectivity of photodegradation of MB and CR dyes using ZnO-Activated Carbon composite. The result showed that  photodegradation of MB reach optimal condition at pH 11 with radiation time 4 hour, whereas CR is at pH 5 with the same radiation time. The more initial concentration of MB and CR applicated, the lower of photodegradation percentages. Constanta of photodegradation rate of MB and CR dyes using ZnO-Activated Carbon composite are 0.8316 and 1.4938 hour-1 respectively. ZnO-Activated Carbon composite as a photocatalyst can degrade effectively MB and CR dyes with photodegradation percentages of 99.40±0.23 % and 99.61±0.24% respectively.
AKUMULASI LOGAM BERAT KROM(Cr) PADA TANAMAN KENTANG (Solanum tuberosum L.)AKIBAT PEMBERIAN PESTISIDA, PUPUK ORGANIK DAN KOMBINASINYA M. Manurung1; Y. Setyo; N. P. N Repli Suandewi2
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (331.633 KB) | DOI: 10.24843/JCHEM.2018.v12.i02.p12

Abstract

Pada saat ini para petani kentang cenderung berorientasi pada produksi yang tinggi, tanpa memperhatikan kualitas kentang yang dihasilkan, khususnya kandungan logam berat krom. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian pupuk organik, pestisida dan kombinasinya terhadap peningkatan kadar logam berat krom (Cr), serta distribusinya pada tanaman kentang( Solanum tuberosum L.). Penelitian dilakukan dengan empat perlakuan yang berbeda yaitu; tanaman kentang tanpa perlakuan (P1), diberi pestisida( P2), diberi pupuk Organik (P3), diberi pestisida dan pupuk organik(P4). Pengamatan dilakukan mulai dari pembibitan hingga pada pasca panen. Akumulasi logam krom total pada setiap bagian tanaman dianalisis secara perodik,setiap bulan menggunakan spektofotometer serapan atom. Hasil penelitian menunjukkan bahwa lahan pertanian, pestisida, pupuk organik dan bibit kentang mengandung logam berat Cr. Pemberian pestisida, pupuk organik dan kombinasinya berperan dalam meningkatkan kandungan logam berat krom pada setiap bagian tanaman kentang. Kata kunci: kentang, kromium, logam berat, pestisida, pupuk oganik

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