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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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MODIFIKASI SILIKA GEL DARI ABU SEKAM PADI DENGAN LIGAN DIFENILKARBAZON I Wayan Sudiarta; Ni Putu Diantariani; Putu Suarya
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

Modification of silica gel from rice husk ash by diphenylcarbazone ligand have been conducted. This study included synthesis of silica gel from rice husk ash, determination of the optimum ratio of ligand/silica gel, optimum time of silica gel modification The results showed that the modification of silica gel from rice husk ash with diphenylcarbazone has been successfully synthesized, indicated by appearearance of characteristic absorbances of Si-O-Si, Si-OH, -NH, Ar-H, C=O functional groups on the infra red spectra at 1096, 910-830, 3330, 3242, cm-1, and 1660 cm-1, respectively. The optimum of ligand/silica is 0,5 mmol : 0,5 g or 1mmol ligand 1g silica gel, with the modification time of 4 hours.

ISOLASI ENZIM AMILASE DARI KECAMBAH BIJI JAGUNG LOKAL SERAYA (Zea mays L.) UNTUK HIDROLISIS PATI Sri Wahyuni; Putu Suarya; I Made Ary Saputra
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 bertujuan untuk mengetahui waktu optimum dari amilase yang dapat menghasilkan aktivitas enzim tertinggi dan untuk mengetahui konsenstrasi garam ammonium sulfat optimum untuk mendapatkan aktivitas amilase tertinggi dari perkecambahan jagung lokal Seraya. Aktivitas amilase diperoleh dari mereaksikan ekstrak enzim yang telah dilarutkan dalam buffer fosfat pH 7 dengan substrat pati. Campuran diinkubasi pada suhu 70C selama 20 menit. Hasil reaksi yang berupa gula pereduksi dianalisis dengan reagen DNS menggunakan metode spektrofotometri pada panjang gelombang 515,6 nm. Hasil yang diperoleh menunjukkan bahwa aktivitas amilase tertinggi didapat dari perkecambahan biji jagung pada jam ke-42 danfraksinasi garam ammonium sulfat dengan konsentrasi 0-20% jenuh.

POTENSI EKSTRAK KULIT BATANG BUNI (Antidesma bunius L. Spreng) UNTUK MENURUNKAN KADAR GLUKOSA DARAH TIKUS WISTAR HIPERGLIKEMIA S. R. Santi; I. M. Sukadana; N. W. I. Paramitha
Jurnal Kimia (Journal of Chemistry) Vol.14 No.1 Januari 2020
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Buni (Antidesma bunius L. Spreng) is one of the traditional medicinal plants whose stem bark has been proven in vitro as an antidiabetic by inhibiting the activity of the ? glucosidase enzyme. This study aims to determine the potential of ethanol extract of buni bark to reduce blood glucose levels in wistar rats in vivo induced by alloxan. Two groups of control rats K (+) and K (-), and three groups of treated rats (P1, P2, and P3) which were given the extract with a dose of 50, 100, and 200 mg/ kg BW respectively, were induced with 150 mg / kg BW alloxan monohydrate to make the rats hyperglycemic. On the 14th day of the trial (posttest) the average blood glucose level was tested using ANOVA with a = 0.05 and Tamhane's. It was concluded that the 200 mg / kg BW ethanol extract of buni bark was able to reduce blood glucose levels to closer to the normal condition when compared to negative control K(-). Keywords: antidiabetic, Antidesma bunius L. Spreng., GC-MS, stem barks

KARAKTERISASI FRAKSI AKTIF ANTIBAKTERI EKSTRAK DARI DAUN PEPE (Gymnema reticulatum Br) I M. Dira Swantara; I. B. Darmayasa; Sri lestari
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 (536.447 KB)

Isolation and caracterisation of antibacterial compounds in the leaves pepe have been carried out. Extractionwas carried out by macerating using methanol and 70%. Separation of extracts which have activity to Eschericia coliand Stathylococcus aereus was conducted using the solvent partition by petroleum ether, chloroform, and ethylacetate. The most active extract, the ethyl acetate extract was separated by column chromatography using a mixtureeluent of chloroform, and ethyl acetate with a ratio of 1:1. The eluents were tested for their bioactivity asantibacterial agent and the results established that fraction 1 was the most active fraction. This next wing fraction 1was then identified using GC-MS.The gas chromatogram showed 3 peaks at 18.658 minutes (33.69%), 19.617 minutes (34.01%), and 25.492minutes (32.69%). It was suggested that the fraction contains three compounds. The first peak has a molecularion atm/z 296 with a base peak of 68, matches with the spectra of 3,7,11,15-tetramethyl 2-hexadesene-1-ol. The secondpeak, m/z 270 and 74, matches with the spectra of metyl hexadecanoate ester. The last peak has amoleculer ion at390 and base peak at 149, suggesting it is dioctyl-1,2-benzenedicarboxylilate.

TOTAL LOGAM Pb DAN Cr DALAM TANAH PERTANIAN DAN AIR DANAU BERATAN SERTA BIOAVAILABILITASNYA DALAM TANAH PERTANIAN DI DAERAH BEDUGUL I. G. Eka Saputra Jaya; I Made Siaka; Ni Putu Diantariani
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

This paper discusses the total metal contents of Pb and Cr in soil of agricultural land and water of Lake Beratan, as well as their bioavailabilities in soil of the land in Bedugul area. This study aims to determine the total metals and the bioavailability of Pb and Cr in the soils of agricultural land in Bedugul area and determine the total metal Pb and Cr in the water of Lake Beratan. The total concentrations of Pb and Cr in soil samples and water of the lake were analyzed by using Atomic Absorption Spectrophotometer (AAS). The bioavailabilities of Pb and Cr in soil samples were also determined and analyzed by AAS. The results showed that the highest total concentrations of Pb and Cr were found in the soil located near the high way, which were 14.6162 mg/kg for Pb and 15.5380 mg/kg for Cr. The total concentration of Pb and Cr in water of Beratan lake were 0.2802 mg/L and 0.2213 mg/L respectively. Cr metal was more bioavailable compared to Pb metal in the soil of Bedugul area. Bioavailable Pb was detected only in the soil sample collected from the area near the high way, which was about 45% bioavailable (as extracted by HCl) and potentially bioavailable was about 27% (the different percentages of Pb extracted by EDTA and by HCl. On the other hands, bioavailable Cr metal was detected in every soil sample (60-76%) and its potentially bioavailable ranged between 6 and 17%.

EKSTRAKSI DAN IDENTIFIKASI SENYAWA KIMIA PADA DAUN PURING (Codiaeum variegatum) DENGAN PELARUT AIR, ETANOL, ETIL ASETAT DAN N-HEKSANA N. L. U. Sumadewi; D. H.D. Puspaningrum
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

Paper ini membahas ekstraksi dan identifikasi senyawa kimia pada daun puring (codiaeum variegatum) yang berpotensi sebagai obat penyembuh luka. Serbuk daun puring dimaserasi dengan menggunakan empat pelarut berbeda yaitu, air, etanol 70%, etil asetat, dan n-heksana. Pengujian fitokimia dilakukan secara kualitatif untuk mengetahui ada tidaknya senyawa kimia yang terkandung pada daun puring, kemudian ekstrak yang positif mengandung senyawa kimia diidentifikasi menggunakan UV-Vis. Berdasarkan hasil ekstraksi menggunakan pelarut air dan etanol 70% menghasilkan rendemen paling tinggi (0,36%) dan (0,30%) bila dibandingkan etil asetat (0,14%) dan n-heksana (0,07%). Hasil uji fitokimia pada ekstrak daun puring dalam pelarut air terdeteksi tanin dan saponin, pada ekstrak dalam pelarut etanol dan etil asetat hanya terdeteksi senyawa tanin, sedangkan pada pelarut n-hekana tidak terdeteksi senyawa kimia. Ekstrak daun puring kemudian diidentifikasi menggunakan UV-Vis. Pada ekstrak air diperoleh 3 puncak pada panjang gelombang 325 nm; 272,5 nm; dan 216,5 nm. Pada ekstrak etanol diperoleh 2 puncak pada panjang gelombang 327 nm dan 272,5 nm. Ekstrak etil asetat diperoleh 2 puncak yaitu pada panjang gelombang 407 nm dan 665 nm.

SENYAWA ANTIBAKTERI GOLONGAN FLAVONOID DARI BUAH BELIMBING MANIS (Averrhoa carambola Linn.L) I M. Sukadana
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 (329.154 KB)

Isolation and identification of active antibacterial compounds from star fruit (Averrhoa carambola Linn). hasbeen carried out. As much as 140.56 g of concentrated methanol extract was resulted from 10 kg star fruit that wasmacerated using methanol. This extract was dissolved into methanol-water (7:3) and then partitioned with n-hexaneand chloroform respectively, resulting in concentrated extracts of 0.10 g of n-hexane, 0.07 g of chloroform, and48.01 g of water. The result of phytochemical test for flavonoid for all of the extracts suggested that water extractsshowed most be test intense to the flavonoid.Separation of water extract using column chromatography resulted in FB fractions that was orange as muchas 0.2027 g and contains flavonoid. Infra red and UV-vis spectroscopy were employed in order to identify the FBfraction. The result of identification showed that isolate (fraction FB) was cathechin compounds which containedhydroxyl groups at C-3, C-7 and C-4’. It also had functional groups like –OH, C-H aromatic, C-H aliphatic, C=Caromatic, C-O alcohol, and it did not contained C=O carbonyl group. The isolate inhibited E.coli growth at 100 ppmand S. aureus grouth at 500 ppm.

PENGOLAHAN LARUTAN DETERJEN DENGAN BIOFILTER TANAMAN KANGKUNGAN (IPOMOEA CRASSICAULIS) DALAM SISTEM BATCH (CURAH) TERAERASI Ni G. A. M Dwi Adhi Suastuti; I Wayan Suarsa; Dwi Kurnia Putra R
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 aimed to determine the ability of kangkungan plant (Ipomoea crassicaulis) as a biofilter in the treatment process of detergent solution with the use of an aerated batch system (bulk). The processing units were conditioned in a Styrofoam container equipped with an aeration system. A total of 24 L detergent solution and 5 kangkungan plants were applied in the units. As a comparison, a control unit containing the same solution without the addition of kangkungan plants was also carried out. Investigations of the ability of kangkungan in reducing the content of the pollutants which were measured as COD value, surfactant and phosphate levels were run within 30 days of observations. After 30 days it was found that there was a decrease in surfactant and phosphate levels, which were 97.76%; and 90.77%, respectively while the control showed a decrease of 50.79% and 51.53%, respectively

SKRINING SELULASE DARI TANAH HUTAN MANGROVE PANTAI SUWUNG BALI I Nengah Wirajana; Ketut Ratnayani; Darma Asih Yuliana
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 (133.478 KB)

Mangrove soil has high biodiversity and well known as potential location for enzymes exploration. The aim of direct screening for cellulase of mangrove soil is to find out the cellulase activity from mangrove soil. Mangrove soils were collected from three different locations labelled as A (8o43’38.20”SL), B (8o43’46,18”SL), and C (8o43’37,38”SL). The screening was conducted by Filter Paper Assay and Carboxymethyl Cellulose Assay methods. The results showed that cellulase activities can be measured directly from mangrove soil samples of Suwung Beach-Bali. The highest cellulase activities were 0,866 U/g soil by Filter Paper Assay and4,176 ± 0,630 U/g soil by Carboxymethyl Cellulose Assay, given by soil samples C.

MODIFIKASI LEMPUNG BENTONIT TERAKTIVASI ASAM DENGAN BENZALKONIUM KLORIDA SEBAGAI ADSORBEN ZAT WARNA RHODAMINE B Ni Putu Widya Tironika Dewi; I Nengah Simpen; I Wayan Suarsa
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

Telah dilakukan penelitian tentang modifikasi lempung bentonit yang teraktivasi asam dan terinterkalasi surfaktan sebagai adsorben dalam penyerapan zat warna rhodamine B. Asam yang digunakan untuk aktivasi adalah asam sulfat 1,5 M dan surfaktan untuk interkalasi digunakan surfaktan benzalkonium klorida (BKC) dengan variasi konsentrasi 0,1; 0,5; dan 1% (v/v). Karakterisasi adsorben dilakukan dengan metode difraksi sinar-X untuk menentukan perubahan basal spacing d001 dan spektrofotometer FTIR untuk menentukan gugus fungsional yang terkandung pada adsorben. Hasil penelitian menunjukkan terjadinya perubahan basal spacing d001 untuk adsorben Ao, Aa, Aa0,1, Aa0,5, dan Aa1 secara berturut-turut adalah 17,3312; 17,1642; 16,1432; 16,1680; dan 19,7156 Å. Nilai keasaman permukaan tertinggi dimiliki oleh adsorben Aa0,1 yaitu sebesar 1,8657 ± 0,0111 mmol/g. Sementara nilai luas permukaan untuk adsorben Ao, Aa, Aa0,1, Aa0,5 dan Aa1 secara berturut – turut adalah 89,6888; 90,1982; 90,3896; 90,3110; dan 90,3053 m2/g. Waktu optimum adsorpsi 90 menit dapat mengadsorpsi adsorbat sebanyak 22,0944 mg/g. Kapasitas adsorpsi tertinggi dimiliki oleh adsorben terinterkalasi BKC 0,1% (Aa0,1) yaitu sebesar 10,6905 mg/g, dengan mengikuti model Freundlich dengan koefisien linier (R2) 0,980.

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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

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

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