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Jurnal Kimia (Journal of Chemistry)

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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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PREPARASI KATALIS NIKEL-ARANG AKTIF UNTUK REAKSI HIDROGENASI ASAM LEMAK TIDAK JENUH DALAM MINYAK KELAPA Imam Rasidi; Anak Agung Bawa Putra; I Wayan Suarsa
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 aims to determine the optimum concentration of nickel nitrate in the formation of a nickel catalyst embedded on activated charcoal by impregnation method, the chemical and physical properties of nickel- coconut shell charcoal in partidular acidity and surface area, as well as the ability of nickel-charcoal catalyst activity in the hydrogenation of linoleic methyl ester in coconut oil. The study begins with a preparation of a mixture of activated charcoal with NaOH activation and preparation of nickel-activated charcoal catalyst with a wet impregnation method. At this stage FT-IR and UV-Vis were used to characterize the products. The resulting catalytic activity was tested with the hydrogenation reaction. Esterification was then performed and the result was determined with GC-MS. The optimum concentration of the catalyst was found to be 0,3M. The catalyst acidity was indicated by the presence of oxide groups including carboxyl, phenols, aldehydes and carbonyl groups, whereas the average surface area was about 21.8753 m2/g. The catalytic activity of nickel-activated carbon in the hydrogenation reaction of methyl ester was optimum at a pressure of 2 atmospheres.

PEMANFAATAN BATU PASIR LAUT WARNA HITAM TERAKTIVASI NaOH 4 N DAN TERSALUT Fe2O3 SEBAGAI ADSORBEN ION NITRAT I Nengah Simpen; Putu Suarya; Komang Yogi Purnamawati
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 (190.885 KB)

The research about adsorption of nitrate ion was carried out by black sandstone that was activated by 4 N NaOH and coated by Fe2O3, and washed by aquades with coating pH variation of 5, 7 and 11. The aim of this research is to find the ability of modified sandstone adsorbent in decreasing nitrate ion concentration. This research included the determination of surface acidity by acid-base titration method, determination of the specific surface area by blue methylene method, determination of equilibrium time of adsorption, adsorption isotherms and adsorption capacity of sandstone on nitrate ions by UV-vis spectrophotometer. The results showed that the highest surface acidity came from the sandstone activated with 4 N NaOH and Fe2O3-coated (A1) which was 0.4423 mmol/g, where as the highest specific surface area was owned by sandstone activated with 4 N NaOH and with Fe2O3-coated pH 7 (A3), which was 21.2899 m2/gram. Isotherm patterns were classified in the Langmuir adsorption isotherm with r value 0.9895. The highest nitrate ion adsorption capacity of the adsorbent at pH 4.19 was 2.8333 mg/g in equilibrium time of 90 minutes. In this study, sandstone activated with 4 N and coated with Fe2O3 was able to provide higher capacity than the sandstone control.

KANDUNGAN LOGAM Pb DAN Cu TOTAL DALAM AIR, IKAN, DAN SEDIMEN DI KAWASAN PANTAI SERANGAN SERTA BIOAVAILABILITASNYA I Gusti Ngurah Raka Aryawan; Emmy - Sahara; Iryanti Eka Suprihatin
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

Dalam paper ini dibahas mengenai kandungan logam berat Pb dan Cu dalam air laut, ikan, dan sedimen di kawasan Pantai Serangan beserta bioavailabilitasnya.Tujuan penelitian ini untuk menentukan konsentrasi kedua logam pada berbagai sampel dan melakukan spesiasi terhadap kedua logam tersebut dengan teknik ekstraksi bertahap sehingga bioavailabilitasnya dapat ditentukan. Destruksi untuk penentuan logam Pb dan Cu total dalam ikan dan sedimen dilakukan dengan menggunakan campuran pelarut H2SO4 dan HNO3 untuk ikan dan aqua regia untuk sedimen, sedangkan ekstraksi bertahap dilakukan dengan mengikuti 4 tahap ekstraksi dengan berbagai pelarut. Konsentrasi Pb dan Cu total dalam air laut di kawasan Pantai Serangan adalah berturut-turut sebesar 0,0389 ± 0,02 mg/L dan 0,0017±0,00 mg/L, dalam ikan sebesar 2,4248±1,11 mg/kg dan 1,5514±0,06 mg/kg dan dalam sedimen sebesar 32,3011 ± 3,02 mg/kg dan 9,1232±1,62 mg/kg. Hasil spesiasi untuk logam Pb dan Cu dalam sedimen berturut-turut sebagai berikut: fraksi EFLE sebesar 6,20% dan 1,55%; fraksi Fe/Mn oksida sebesar 12,03% dan 1,01%; fraksi organik sulfida sebesar 31,77% dan 20,04% serta fraksi resistant sebesar 50,00% dan 77,40%. Dengan demikian maka fraksi bioavailabel dalam sedimen untuk Pb dan Cu adalah berturut-turut sebesar 50,00% dan 22,60% sedangkan fraksi resistant nya sebesar 50,00% dan 77,40%

SENYAWA KUERSETIN SEBAGAI AGEN ANTIKANKER KOLOREKTAL SECARA IN SILICO P. V. P. Putri; N. M. P. Susanti; N. P. L. Laksmiani
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

Colorectal cancer is a third rank malignant cancer in Indonesia, generally caused by the diet of the Indonesian people who have change with the consumption of food with high fat and low in fiber, also due to the production of carcinogenic substances from the breakdown of fat. In the condition of colorectal cancer there is overexpression of COX-2 and inhibition of Caspase-3 which causes the increase of cancer cells survival and causes inhibition of apoptosis mechanism. Quercetin is one of flavonoid which known have activity as an antitumor and tested in vitro can induce apoptosis on WiDr colorectal cancer cells . The purpose of this study was to determine the affinity and mechanism of quercetin compounds on COX-2 and Caspase-3 target proteins as colorectal anticancer by in silico with molecular docking. The study was conducted exploratively with the stages of preparing a database of 3D quercetin structures, as well as COX-2 and Caspase-3 proteins, optimization of 3D quercetin structure, protein preparation, molecular docking method validation, and quercetin docking on these proteins. Docking results were assessed from the binding energy and hydrogen bonds that formed between quercetin with proteins. The smaller binding energy value, the stronger the bond between quercetin and proteins is. The results showed that quercetin had an activity as a colorectal anticancer because it was able to inhibit COX-2 and induce Caspase-3 with binding energy values of -9.54 and -4.59. These results showed that quercetin has the potential to induce apoptosis in colorectal cancer. Keywords: colorectal cancer, quercetin, caspase-3, in silico

ISOLASI SENYAWA SITOTOKSIK DARI DAUN ANDONG (Cordyline terminalis Kunth) N. W. Bogoriani; Sri Rahayu Santi; I. A. R. Astiti Asih
Jurnal Kimia (Journal of Chemistry) Vol. 1, No. 1 Januari 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 (70.785 KB)

Isolation and identification one of cytotoxic fraction have been conducted from the leaves of Andong(Cordyline terminalis Kunth). The fraction having LC50 values of 41,64 ppm contains saponin. Major isolate (7.5 mgwhite amorphous solid) was obtained after a series of chromatographic separations (gravity column chromatography,and preparative high performance liquid chromatography). Identification of the isolate using mass spectrometry withpositive electrospray showed MW of 866 as calculated from the ion peaks m/z 889[M + Na]+, and 867[M + H]+.The ion peaks at m/z 721[(M + H) - 146]+, 703[(M + H) - 164]+, 575[(M + H) - 292]+, 557[(M + H) - 310]+ , 429[(M+ H) - 438]+, and 411 [(M + H) - 456]+ of its fragments indicate the presence of three sugars (two terminal sugarsand one central sugar) from methylpentose moiety with MW 164 eash linked to an agyicone of MW of 428. Protonmagnetic resonance spectrum of the isolate in pyridine-d5 showed characteristic proton signals for three steroidmethyls (two angular methyls and one secondary methyl) at d 1.37 (s), 0.84 (s) and 1.02 (d, J = 6.6 Hz); anexomethylene group at d 4.79 ppm and 4.71 (each br s); an ethylene group at d 5.52 ppm (br d, J = 5.4 Hz); signalsof the protons linked to C26 at d 4.01 and 4.44 ppm (each d, J = 12.0 Hz), and three anomeric 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 be indicated that the isolate resultedis spirostan steroidal saponin.

KARAKTERISTIK SIFAT FISIKO KIMIA GELATIN HALAL YANG DIEKSTRAK DARI KULIT AYAM BROILER MELALUI VARIASI SUHU Ni Made Puspawati; I Nengah Simpen; Ni Luh Putu Suciptawati
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 1 Januari 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The aim of this study was to characterize physicochemical properties of gelatin extracted from skin of chicken at different temperatures (40oC, 45oC, 50oC) for 24 hours. Pre-treatment of dry defatted skin of chicken was done with a combination of alkaline-acid solution sodium hydroxide (NaOH, 0.15%w/v), sulfuric (0.15%v/v) and citric acid (0.7%w/v) and extraction was carried out in waterbath by adding water at pH 4-5. Physicochemical properties analyzed were yield, gel strength, proximate compositions, pH and characteristicfunctional groups. Statistical analysis showed that temperatures of extraction significantly (p<0.05) affected the physicochemical properties of gelatin produced. The yield and proximate compositions increased by increasing temperatures of extractions. The highest yield, water, protein, ash and fat content of gelatin (based on dry weight) were obtained at 50oC and the lowest at 40oC. Conversely, gel strength of gelatin decreased by increasing the temperature of extraction. Gelatin prepared at 40oC showed the highest gel strength (114.84g bloom) which was higher than gel strength of gelatin commercial (98.81 bloom) (p<0.05) while gelatin extracted at 45oC gave the lowest value (73.44g bloom). Gelatin extracted at different temperatures had significantly different pH (p<0,05). pH value of gelatin extracted at 40oC,45oC, dan 50oC was 3,29, 3,47, and 4,29 respectively. Fourier transform infrared (FTIR) spectra of all gelatin prepared in this experiment revealed the presence of band corresponding to –OH, C-O, N-H and C-N, C=O and NCO of secondary amidewhich characteristic for gelatin functional groups.

STUDI PEROMBAKAN ZAT WARNA TEKSTIL REMAZOL RED RB SECARA AEROB MENGGUNAKAN BAKTERI ENTEROBACTER AEROGENES YANG DIISOLASI DARI LUMPUR LIMBAH TEKSTIL I Dewa Sastrawidana
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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The objective of this research is to study the potential use microorganism which is identified as Enterobacter aerogenes isolated from sludge of textile wastewater treatment plant. Reactor was operated to treat remazol red RB azo dyes under aerobic condition. The performance of the bioreactor was evaluated by monitoring color removal within various pH of the medium, dye concentrations and incubation times. The degradation products were characterized by UV–vis techniques. The result showed, Enterobacter aerogenes bacteria was able to successfully decolourize 75 mg/L of remazol red RB azo dyes under aerobic condition, at pH 7-8 and for seven days incubation with biodegradation efficiency of up to 87,9%.

PEMBERIAN EKSTRAK ETANOL BUAH BUNCIS (Phaseolus vulgaris L.) UNTUK MENURUNKAN KOLESTEROL TOTAL, Low Density Lipoprotein (LDL) DAN MENINGKATKAN High Density Lipoprotein (HDL) PADA TIKUS WISTAR DIET TINGGI LEMAK Sri Wahjuni; Ni Luh Rustini; Putu Yuliantari
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

Excessive fat consumption can increase blood cholesterol level. Phytosterol composition in the plant can decrease blood cholesterol level. One of the plants that contain phytosterol is beans. This study was to prove the effect of antihypercholesterol the ethanol extract of the beans (Phaseolus vulgaris L.) with variety of doses of 50 mg/Kg BW; 100 mg/Kg BW and 150 mg/Kg BW in male Wistar rats with high fat level condition. Subjects of this study were 24 Wistar rats divided into 6 groups randomly with posttest control group study design. First group as negative control, second group as positive control, and the third (high cholesterol diet and ethanol extract in dose of 50 mg/kg,bw), fourth ( high cholesterol diet and ethanol extractin dose of 100 mg/kg,bw), fifth ( high cholesterol diet and ethanol extract in dose of 150 mg/kg,bw), sixth (high cholesterol diet and simvastatin drug). The data was analyzed with ANOVA Tukey test. The result of this study shows total cholesterol levels decrease 23,88%; 30,14%; 35,82%. Cholesterol LDL levels decrease 38,09%; 52,38%; 61,35%. Cholesterol HDL levels increase 21,86%; 56,56%; 63,84%. Dose variant on this study giving the best result to decrease total cholesterol levels and LDL was 150 mg/Kg BW. Furthermore, 100 mg/Kg BW dose gave the best result to increase HDL cholesterol level. Based on the results it can be suggested that beans ethanol extract is able to decrease total cholesterol level, LDL and increase HDL cholesterol levels.

AKTIVITAS EKSTRAK METANOL RIMPANG KUNYIT PUTIH (Curcuma zedoaria Rosc.) SEBAGAI HIPOLIPIDEMIA PADA TIKUS WISTAR PUTIH OBESITAS DENGAN DIET TINGGI KOLESTEROL A. Intan Saridewi; N.W. Bogoriani; P. Suarya
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

Obesitas merupakan keadaan akumulasi lemak yang tidak normal. Obesitas berdampak pada berbagai macam penyakit degeneratif yaitu diabetes militus, hiperkolesterolimia, aterosklerosis, dislipidemia, dan penyakit jantung koroner. Kunyit putih (Curcuma zedoaria Rosc.) diketahui mengandung senyawa polifenol (kurkuminoid) yang dapat berperan sebagai antioksidan. Penelitian ini bertujuan untuk mengetahui aktivitas ekstrak rimpang kunyit putih pada profil lipid tikus wistar obesitas dengan diet tinggi kolesterol serta mengetahui golongan senyawa metabolit sekunder yang terkandung dengan uji fitokimia. Uji Aktivitas ekstrak rimpang kunyit putih menggunakan tikus wistar betina obesitas yang diberi diet tinggi kolesterol sebagai kontrol positif dan pemberian ekstrak dengan dosis 35 dan 70 mg/kgBB/hari sebagai perlakuan serta tikus wistar betina normal yang diberi diet standar sebagai kontrol negatif. Hasil analisis menunjukkan bahwa ekstrak metanol rimpang kunyit putih pada dosis 35 dan 70 mg/kgBB/hari mampu menurunkan kadar trigliserida, kolesterol LDL, dan kolesterol total dan pada dosis 70 mg/kgBB/hari dapat meningkatkan kadar kolesterol HDL secara signifikan (p<0,05). Hal ini disebabkan oleh adanya golongan senyawa flavonoid, alkaloid, fenolat, terpenoid dan saponin yang positif terkandung dalam ekstrak rimpang kunyit putih dari uji fitokimia. Berdasarkan hal tersebut, ekstrak rimpang kunyit putih pada dosis 70 mg/kgBB/hari mampu berperan sebagai hipolipidemia pada tikus wistar obesitas dengan diet tinggi kolesterol. Kata kunci : ekstrak metanol rimpang kunyit putih, trigliserida, kolesterol LDL, kolesterol HDL,

PREPARATION AND CHARACTERIZATION OF PbSe THIN FILMS BY CHEMICAL BATH DEPOSITION Anuar Kassim; Tan Wee Tee; Dzulkefly Kuang Abdullah; Md. Jelas Haron; Ho Soon Min; Shanthi Monohorn; Saravanan Nagalingam
Jurnal Kimia (Journal of Chemistry) Vol. 4, No. 1 Januari 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 (229.394 KB)

PbSe thin films were grown onto glass substrates by chemical bath deposition method. Structure and surfacemorphology of thin films were characterized by X-ray diffraction and scanning electron microscopy. The band gapenergy and type of optical transition were determined from optical absorbance data. The deposition parameters wereoptimized to obtain good quality of thin films. X-ray diffraction indicates that the films have cubic structure. TheSEM micrograph showed the films do not cover the glass substrate completely and consisted of irregular shapedgrains. The films show good optical properties with high absorption in the visible region and the band gap value wasestimated to be 1.3 eV.

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Ni Putu Diantariani

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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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Home Page

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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

Phone
+628123640424

Journal Mail Official
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