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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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FRAKSINASI DAN BIOAVAILABILITAS LOGAM BERAT Fe DAN Mn PADA SEDIMEN DI PELABUHAN BENOA Emmy Sahara; Ida Ayu Gede Widihati; I Gede Darma Putra
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

A research on metal fractionation and bioavailability of Fe and Mn in sediments collected from the area of Benoa Bay at Bali has been carried out. The purpose of this study was to determine the fraction of Fe and Mn in the sediments and their bioavailabilities. Fractionations were achieved by the Sequential Extraction methods during which various solutions were employed. Measurement of the concentration of both metals was done by using Atomic Absorption Spectrofotometer with a calibration curve method. The concentrations of total Fe and Mn in the sediment obtained were of 668.2948 mg/kg and 321.5761 mg/kg, respectively. The results of Fe and Mn fractionations in sediments were as follow: the fraction of freely, leachable and exchangeable (EFLE) were of 27.74% and 24.31%, the fractions of Fe/Mn-oxides were of 23.55% and 19.99%, organic and sulfide fraction were of 25.14% and 26.11% while the resistant fraction were of 23,57% and 29,59%, respectively. It Therefore, the results showed that the bioavailable and the resistant fractions for Fe in the sediment were of 76.43% and 23,57%, respectively while for Mn were of 70.41% and 29,59%, respectively

ISOLASI DNA METAGENOMIK DARI TANAH HUTAN MANGROVE PANTAI SUWUNG BALI I Nengah Wirajana; Darma Asih Yuliana; Ketut Ratnayani
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

Metagenomic DNA isolation from mangrove forest soils of Suwung Beach-Bali was conducted to exploit the biocatalytic potential of microbial communities for the discovery of novel cellulase. The whole DNA isolation was conducted by modification of preparation step by Marco (2010) and DNA extraction step by Amorim et al (2008). The results of metagenomic DNA isolation were analyzed by spectrophotometry and agarose gel electrophoresis. The results showed that whole DNA was able be isolated successfully, but protein and humic acid were found as contaminant.

KADAR LOGAM SENG PLASMA DAN ALKOHOL DEHIDROGENASE PADA TIKUS YANG DIBERI ETANOL Elfrida Magdalena Manurung; Ida Bagus Putra Manuaba; Anak Agung Bawa Putra
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

Penelitian ini bertujuan mengetahui kadar logam seng plasma alkohol dehidrogenase pada tikus yang diberi etanol 40 % dengan volume 2 mL dan 3 mL. Rancangan penelitian ini menggunakan Randomized Posttest Only Control Group Desain dengan dua kelompok perlakuan dan satu kelompok kontrol. Rata-rata kadar logam seng plasma pada tikus kontrol (K) dan tikus yang diberi etanol 40 % dengan volume 2 mL (P1) dan 3 mL (P2) adalah 445,83 ± 27,76 mg/L; 928,38 ± 183,13 mg/L; dan 1228,75 ± 80,00 mg/L. Hasil perhitungan rata-rata aktivitas alkohol dehidrogenase plasma pada tikus kontrol dan tikus yang diberi etanol 40 % dengan volume 2 mL dan 3 mL adalah 21,00 ± 0,34 ng/mL; 18,69 ± 0,31 ng/mL dan 17,05 ± 0,33 ng/mL. Hasil ANOVA menunjukkan p < 0,05 sehingga terdapat perbedaan bermakna kadar logam seng plasma dan aktivitas alkohol dehidrogenase pada tikus kontrol dan tikus yang diberi etanol 40 % dengan volume 2 mL dan 3 mL. Hasil analisis Tukey/HSD untuk kadar rata-rata logam seng plasma tikus kontrol dan tikus yang diberi etanol 40 % dengan volume 2 mL dan 3 mL memiliki perbedaan signifikan, yaitu terjadinya peningkatan kadar logam seng plasma dan pada aktivitas alkohol dehidrogenase dengan terjadi penurunan pada kelompok tikus yang diberi etanol 40 % dengan volume 2 mL dan 3 mL terhadap tikus kontrol.

AKTIVITAS DARI KUERSETIN SEBAGAI AGEN PENCERAH KULIT SECARA IN SILICO K. D. Adnyani; L. W. E. Lestari; H. Prabowo; P. A. I. A. Siaka; 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

Increasing melanogenesis process causes excessive melanin synthesis resulting in darkening of the skin color. The melanogenesis process requires mealnogenesis enzymes, one of which is tyrosinase-related protein 1. One of the flavonoid compounds that has the potential as a skin lightening agent is quercetin. The antioxidant activity of quercetin plays a very important role in antimelanogenesis. This study aims to determine the affinity and molecular mechanism of quercetin on the target protein tyrosinase-related protein 1 using in silico molecular docking method. Molecular docking is carried out through stages including optimization of the structure of quercetin compounds, preparation of the target protein tyrosinase-related protein 1, validation of the molecular docking method, and docking of quercetin on the tyrosinase-related protein 1. Docking of quercetin with tyrosinase-related protein 1 produces binding energy values of -7.81 kcal/mol, while docking of native ligand with tyrosinase-related protein 1 produces binding energy values of -5.39 kcal/mol. Quercetin has a strong affinity for tyrosinase-related protein 1 which is indicated by the binding energy from the docking results. Quercetin has activity as a skin whitening agent with in silico test with molecular mechanisms through inhibition of the activity of tyrosinase-related protein 1 enzyme. Keywords: skin whitening agent, in silico, quercetin, tyrosinase-related protein 1

ISOLATION AND IDENTIFICATION MOMORDICIN I FROM LEAVES EXTRACT OF Momordica charantia L. N. M. Purnawati
Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008
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 (61.02 KB)

Momordicin I has been isolated from dichloromethane extract of leaves Momordica charantia, L. Theisolation was done by fractionation the dichloromethane extract followed by bioassay using artemia salina,L larvae.The crude extract was fractionated through reverse phase column chromatography (C18 Sep-Pak) with eluotropicseries solution of MeOH: H2O (0-100% MeOH). The most active fraction, F9 (80% MeOH-20% H2O) was purifiedby recrystallisation from chloroform to yield a white crystal melted at 125-128oC. The structure of the activecompound was determined by interpretation of the spectral data (IR, 1HNMR, 13CNMR, DEPT, HCOSY, HMCOSY,HMBC and MS) and its structure was elucidated as 3,7,23-trihydroxycucurbitan-5,24-dien-19-al which is known asmomordicin I.

LOGAM KROMIUM (Cr) dan SENG (Zn) DALAM AKAR, BATANG, DAN DAUN TUMBUHAN MANGROVE Rhizophora apiculata DI MUARA SUNGAI BADUNG Iryanti Eka Suprihatin; Manuntun Manurung; Devi Mayangsari
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

Cr and Zn contents in the roots, trunks and leaves of the Rhizophora apiculata in estuary of Badung river have been investigated. This study was aimed to determine the ability of Rhizophora apiculata in accumulating heavy metals from the ecosystem. The concentrations of Cr and Zn in the water, sediments, roots, trunks and leaves were determined by the use of Atomic Absorption Spectrophotometer. The results showed that the highest concentrations of both Cr and Zn were found in leaves of the Rhizophora apiculata. Total Cr dan Zn concentrations in the roots were 2,49±0.19 and 19,4 ± 0,06 mg/kg respectively and in the trunks were 3,26 ± 0,28 and 4,14±0,32 mg/kg respectively, while in the leaves were 4,45 ±0,07 and 38,72 ±0,03 mg/kg respectively. The water and sediment contents of the metals were reported separately, and they were much lower than those in the plant samples. Upon comparing these values, it can be suggested that the Rhizophora apiculata was capable of accumulating heavy metals present in its environment.

FRAKSINASI AMONIUM SULFAT PADA ENZIM ?-L-ARABINOFURANOSIDASE TERMOSTABIL I Nengah Wirajana; Ni Nyoman Tri Puspaningsih
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 (283.197 KB)

?-L-Arabinofuranosidases (EC 3.2.1.55) catalyze the hydrolysis ?-L-arabinofuranosidic bonds and act synergistically with other hemicellulases enzymes for the complete hydrolysis of hemicelluloses. Yeast Saccharomyces cerevisiae that considered as Generally Recognized As Safe (GRAS) was chosen for expression and secretion of thermostable ?-L-arabinofuranosidase (AbfA) from Geobacillus thermoleovorans IT-08 termofilik dengan teknologi DNA rekombinan. The extracellular enzyme from the secretion result in this recombinant yeast was precipitated with ammonium sulphate fractionation. Base on the result of measurement of the enzyme activity and the concentration of total protein showed that the specific activity of AbfA enzyme was the lowest at 40% saturation of ammonium sulfat, and the highest at 80% saturation of ammonium sulfat.

PEMBUATAN BIOETANOL DARI KUPASAN KENTANG (Solanum tuberosum L.) DENGAN PROSES FERMENTASI Devi Esteria Hasianna Purba; Iryanti Eka Suprihatin; A.A.I.A. Mayun Laksmiwati
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

Ethanol fermented from potato peels is proposed as one alternative source of renewable energy called bioethanol. In this research bioethanol was produced through four stages namely acid hydrolysis, detoxification, fermentation and distillation. The acid hydrolysis process was carried out using sulphuric acid at 100oC for 60 minutes. The detoxification process was carried out by adding NH4OH into the hydrolyzate prior to fermentation. Distillation was performed up to 100oC and the distillate with the BP of 78-84oC was determined for its ethanol content using gas chromatography. The ethanol produced from 5 grams of dried potato peels through fermentation for 4, 5, 6, and 7 days 3.54%; 4,85%; 5,35%; and 6.15% respectively.

ADSORPSI ZAT WARNA TEKSTIL REMAZOL BRILLIANT BLUE OLEH LIMBAH CANANG DAUN KELAPA S. R. Mustikawati; I N. Simpen; O. Ratnayani
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

Telah dilakukan penelitian adsorpsi zat warna tekstil Remazol Brilliant Blue dengan 2 macam adsorben yaitu adsorben daun kelapa dan adsorben daun kelapa terdelignifikasi (selulosa) yang berasal dari limbah canang daun kelapa. Dalam penelitian ini dilakukan tiga tahap, yaitu preparasi, optimasi, dan karakterisasi. Preparasi untuk mendapatkan adsorben daun kelapa dan selulosa, dan kemudian optimasi dilakukan untuk mengetahui kondisi optimum kedua adsorben dengan variasi massa adsorben, waktu kontak, dan pH larutan. Terakhir, karakterisasi dilakukan untuk mengetahui luas permukaan adsorben secara Methylene Blue method, jumlah situs aktif kedua adsorben dengan metode titrasi asam-basa, serta gugus fungsi dengan Fourier transform infrared (FTIR). Pada optimasi, diketahui bahwa kondisi optimum kedua adsorben adalah waktu optimum menit ke 15 dengan massa optimum adsorben 0,1 gram dan pH 4, dengan jumlah adsorbat yang teradsorpsi 10,6 mg/g untuk adsorben daun kelapa dan 10,7 mg/g untuk adsorben daun kelapa terdelignifikasi. Pada penentuan luas permukaan dihasilkan berturut-turut adsorben daun kelapa dan daun kelapa terlignifikasi 34,796 m2/g dan 31,867 m2/g, sedangkan jumlah situs aktif adalah 29,7258 x 1020 molekul /gram dan 28,0522x 1020 molekul/gram. Spektra FTIR menunjukan bahwa daun kelapa terdelignifikasi memiliki gugus OH yang sama dengan selulosa murni. Kata Kunci: adsorpsi, delignifikasi, limbah canang, Remazol Brillian Blue

SUBKLONING GEN -L-ARABINOFURANOSIDASE (abfA) DALAM VEKTOR EKSPRESI pYES2 I Nengah Wirajana; Eddy Bagus Wasito; H.M. Soekry Erfan Kusuma; Ni Nyoman Tri Puspaningsih
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 (512.632 KB)

A Gene encoding -L-arabinofuranosidase (abfa) that had been cloned into recombinant E. coliDH5a/pTP510 was subcloned into Saccharomyces cerevisiae yeast system. The aim of subcloning of abfA gene intoS. cerevisiae is to express the thermostable -L-arabinofuranosidase (AbfA) enzyme in the host that is often termedas Generally Recognized As Safe (GRAS), so that this enzyme earn the broader application like in food and beverageindustries. The gene of abfA was subcloned by the amplification of Polymerase Chain Reaction (PCR) from plasmidpTP510 templat. A pair of primers, pFSacI-Af (forward) and pXhoI-Af (reverse) from designed this research wasused for the amplifcation. The PCR condition was performed as follows : beginning denaturation at 94oC for 5 min;PCR cycle 30 times that consisted of denaturation (94oC for 1 min), annealing (55oC for 30 s), andpolymerization/extension at 72oC for 2 min; and than final extension at 72oC for 7 min. The abfA gene, resulted wasinserted between GAL1 promoter and CYT1 terminator in the pYES2 expression vector. This ligation product wastransformed into E. coli TOP10 host. Restriction analysis of recombinant plasmid from this construction, thedesignated as plasmid pY-Af, showed the expected size, about 7,4 kb, which was the summation of sizes of parentalplasmid ( 5,9 kb) and fragment of DNA insert (1,5 kb).

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

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

Location Kota denpasar, 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

Location
Kota denpasar,

Bali

INDONESIA