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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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PENGOLAHAN AIR LIMBAH PENCUCIAN RUMPUT LAUT UNTUK MENURUNKAN NILAI BOD DENGAN SISTEM BIOFILTRASI EKOSISTEM (SBE) I M. G. Sudyadnyana Sandhika; I W. Budiarsa Suyasa; Iryanti Eka Suprihatin
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

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The research about treatment of wastewater from seaweed washing by biofiltration system with and without microorganism enrichment has been carried out. This research aims to determine the minimum time of the biofiltration process to decrease the BOD to meet the quality standard and the capacity of the biofiltration system. The results showed that the minimum contact time to meet the quality standard (75 mg/L) for BOD is 40 hours for both system. Treatment capacities of the biofiltration system without addition of microorganisms for BOD is 6,8056 mg/L/m3hours, whereas the treatment capacities of the system with addition of microorganisms is 6,4965 mg/L/m3hours.

KOMPOSISI ASAM AMINO DAN POLA PITA PROTEIN GELATIN HALAL DARI KULIT AYAM BROILER Ni Made Puspawati; Ida Ayu Gede Widihati; I Nyoman Widana
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 untuk mempelajari pengaruh perbedaan jenis asam yang digunakan pada proses perendaman terhadap komposisi asam amino, pola pita protein dan kekuatan gel produk gelatin yang diekstrak dari kulit ayam Broiler. Pada penelitian ini asam yang digunakan pada proses perendaman yaitu asam asetat (AA), sitrat (AS), dan laktat (AL). Komposisi asam amino produk gelatin dianalisis dengan HPLC, pola pita protein dianalisis menggunakan metode elektroforesis, dan kekuatan gel diukur dengan CT3 Texture Analyzer. Hasil analisis menunjukkan, ketiga produk gelatin yaitu GAA, GAL,dan GAS mempunyai komposisi asam amino yang tidak jauh berbeda dengan persentase tertinggi glisin, diikuti prolin, glutamat, arginin, dan alanin sedangkan terendah metionin, sistin dan tirosin, serta tidak terdeteksi adanya histidin. Persentase glisin (18,31%) dan prolin (9,18%) untuk GAA tidak berbeda secara signifikan dengan GAS (17,88% dan 8,85%) dan GAL (17,77% dan 7,46%). Elektroforegram SDS-PAGE untuk GAA dan GAS hampir sama yaitu memberikan pita protein dengan berat molekul tinggi pada 85kDA yang diikuti dengan pita protein dengan berat molekul lebih rendah pada 66, 45, 31, dan 25kDA namun pita protein pada GAA lebih tebal dari GAS. GAL tidak menunjukkan pita protein dengan berat molekul yang tinggi, hanya agregates protein dengan berat molekul rendah pada 21 kDA. Hasil pengukuran kekuatan gel untuk GAA 216,63 g bloom, GAS 109,01g bloom, dan GAL 32,73 g bloom. Dari penelitian ini, dapat disimpulkan bahwa jenis asam yang digunakan pada proses perendaman tidak berpengaruh terhadap persentase kandungan asam amino tetapi berpengaruh terhadap pola pita proteinnya (berat molekul) dan kekuatan gel dari produk gelatin yang dihasilkan.

SPESIASI DAN BIOAVAILABILITAS Pb DAN Cu DALAM TANAH PERTANIAN ORGANIK DI BEDUGUL SERTA KANDUNGAN LOGAM TOTALNYA DALAM SAYUR BROKOLI I M. Siaka; H. Nurcahyani; I B. P. Manuaba
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

Bedugul area is a vegetable producing center in Bali that also develops organic farming. This study aimed to determine the bioavailability of Pb and Cu in an organic farm in Bedugul and the content of both metals in broccoli before planting and at harvest. Metal extraction was carried out through wet digestion and its bioavailability was determined by the application of the sequential extraction methods. The measurement of the two metals was accomplished by using AAS. The total Pb content in the organic soils before and after harvesting were found to be 746.102-897.3754 mg/kg and 277.778-328.88217 mg/kg, while Cu were of 93.1212-11-114.3259 mg/kg, and 48,608-92.3708 mg/kg, respectively. The bioavailability of Pb and Cu in soils before planting was different from that of at harvest. Pb metal in organic soil before planting which were readily bioavailable, bioavailable, and nonbioavailable were were found to be (17.80-21.62)%, (44.07-47.65)%, and (30.73-36, 89 )%, while Cu were of (5.02-7.89)%, (55.73-60.57)%, and (32.81-39.25)%, respectively. The total Pb and Cu contents in broccoli were of (27,2968-30,3621) mg/kg and (27,0303-30,0223) mg/kg, respectively. Keywords: bioavailability, broccoli, organic agriculture soil, Pb and Cu, speciation

KARAKTERISTIK ARUS DAN POTENSIAL KATODIK PADA PERLINDUNGAN SISTEM ARUS TERPASANG TERHADAP STAINLESS STEEL TYPE 304 DI LINGKUNGAN AIR LAUT Yuli Panca Asmara
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

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Cathodic protection basically reduces the corrosion rate of a metallic structure by reducing its corrosionpotential, bringing the metal closer to an immune state. So, to optimallize the protection, not only potential but alsoenvironment and system should be considered in designing cathodic protection. The changes of current provided by adirect current (DC) source should be a counted during the protection.The objective of this laboratory was to studed the polarization behaviour concerning 304 stainless steelimmersed in the artificial sweater based on ASTM D 1141 using potentiostat. This task was performed by recordingdata points (potential across a constant resistor) within a determined potential. Then, the surface morphology ofspecimen caused by polarisation potential was investigated using an optical microscope and SEM analysis.The current derived from the polarisation diagram by the determination of several points protectionpotential ranging from -730mV to -1100 mV tend to decrease. The sharp decrease of current occured at protectionpotential of -1100 mV (from 580 mA/m2to 450 mA/m2) there was a slight decrease at protection potential of -730mV. The decrease occurred was from 190 mA/m2 to 150 mA/m2. Potential of protection cathodic also influenced the free corrosion potential. At the protection potential of -730 mV, free corrosion potential was -225 mV, and was-450 mV at the protection potential of -1100mV.By visual examination it can be deduced that the decrease of current density occurred was caused by thegrowth of salt calcareous deposits. By SEM investigation it was indicated that the deposit was made of calcium andmagnesium as a result of the increase of pH during protection. The more detail analisys showed that this depositcreated local pitting corrosion and decreased pitting potential by 200 mV.

PEMANFAATAN TEH KOMBUCHA SEBAGAI OBAT HIPERURISEMIA MELALUI PENURUNAN KADAR 8-HIDROKSI-2-DEOKSIGUANOSIN Made Baruna Jayadilaga; Ida Bagus Putra Manuaba; Ni Luh Rustini
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 utilization of kombucha tea as hyperuricemia medicine by decreasing levels of 8-hydroxy-2-deoksiguanosin (8-OHdG) has been carried out. This study aimed to determine the ability of kombucha tea to decrease uric acid and 8-OHdG levels in hyperuricemia rats. This research is true experimental with posttest only control group design. Rats that had experienced hyperuricemia were given kombucha tea dose of 10 mL/kg body weight and 40 mL/kg body weight of 4, 8, and 12 days fermentation period. The results showed that kombucha tea can decrease uric acid and 8-OHdG levels in hyperuricemia rats. The best dose of kombucha tea in decreasing uric acid and 8-OHdG levels was 40 mL/kg body weight with 8 days fermentation period. The decrease of uric acid and 8-OHdG levels were 93.88% and 85.89% respectively.

MOLECULAR MODELING OF CATIONIC PORPHYRINS AS LIGAD OF RADIOPHARMACEUTICAL KIT Ni Made Pitri Susanti; Rahmana E. Kartasasmita; Amir Musadad; Daryono H. Tjahjono
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

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Cationic porphyrins and their interactions with DNA have become an important concern due to its role as a photosensitizer in photodynamic therapy for cancer treatment. However, this therapy technique has the disadvantage, i.e. its inability to document photographically the fluorescence observed endoscopically. The present research aims to observe the change in molecular level of cationic porphyrins which labeled by radionuclides emitting ? particle and ? radiation. Molecular models of 5,10,15,20-tetrakis-[3.4-bis (carboxymetylenoxy) imidazoliumyl] porphyrin (T3,4BCImP), 5,10,15,20-tetrakis-[3,4-bis (carboxymetylenoxy) pirazoliumyl] porphyrin (T3,4BCPzP) and its complexes which labeled by Tc and Re radionuclides were optimized and calulated by density functional theory methods (DFT). Atomic charges were calculated with natural population analysis/NPA method. The calculation result showed that Tc-T3,4BCPzP has the highest photosensitivity and the strongest affinity to DNA. Carboxylate groups of meso-subtituent of porhyrins lead to label cationic porphyrins by Tc and Re as radiopharmaceutical ligand candidates .

TEKNIK VOLTAMETRI PELUCUTAN ANODIK UNTUK PENENTUAN KADAR LOGAM Cu(II) PADA AIR LAUT PELABUHAN BENOA Irdhawati Irdhawati; Emmy Sahara; I Wayan Hermawan
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

In this research, determination of Cu(II) using anodic stripping voltammetry were conducted by measuring the current peak of Cu(II) standard solution and the concentration of the metals in the seawater around Benoa Port. Deposition time and scan rate was optimized before validation. Parameters of the method validation examined were linear range concentration, limit of detection, repeatability, and % recovery. Seawater samples were collected from two different locations, which were Dermaga Ikan Tuna and Dermaga 2. The result showed the optimum deposition time and scan rate were 540 s and 7 mV/s. Linear range concentrations were 50 to 1000 ppb with correlation coefficient of 0,9998 and the detection limit of 29 ppb. Horwitz Ratio (HorRat) factor was obtained less than 2 for repeatability measurement and percent recovery was 100.58%. The concentration of Cu(II) was found to be 188 ppb in Dermaga Ikan Tuna and 117 ppb in Dermaga 2. The concentration of Cu(II) in the seawater around Benoa Port was higher than the treshold according to Ministry of Environment Regulation No. 51/2004 for Seawater Quality Standard.

ANTIBACTERIAL ACTIVITY OF Samanea saman LEAF ETHANOL EXTRACT AGAINST Escherichia coli AND Staphylococcus aureus AND ITS TOTAL FLAVONOID AND PHENOLIC CONTENTS W. S. Rita; I M. D. Swantara; I. A. R. Astiti Asih; N.K. Sinarsih
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

Antibacterial activity of Samanea saman usually shows a positif correlation to the flavonoid and phenolic contents. The aim of this study was to evaluate the antibacterial activity of the ethanol extract of Samanea saman against Escherechia coli and Staphylococcus aureus and determine the total flavonoid and phenolic contents of the extract. The extraction was done by ethanol 96% at room temperature. The antibacterial assay was conducted by agar disc diffusion method. The total flavonoid and phenolic contents were determined by UV-Vis Spectrofotometer with the standard of quersetin and galic acid, respectively. The extraction of 250 g of Samanea saman leaves resulted in 24.5 g of ethanol extracts. The ethanol extract showed a moderate inhibition of 8.33 mm towards E. coli and a strong inhibition of 13.6 mm towards S. aureus at the concentration of 4%. The Minimum Inhibitory Concentration (MIC) of the extract against E. coli and S.aureus were of 3% and 0.3%”, respectively. The total flavonoid and phenolic contents were successively 1233.2991 mg QE/100g and 2544.6154 mg GAE/100g. Keywords: Escherechia coli, flavonoid and phenolic content, Samanea saman, Staphylococcus aureus

ISOLASI, IDENTIFIKASI, DAN UJI AKTIVITAS ANTIBAKTERI SENYAWA GOLONGAN TRITERPENOID PADA RIMPANG TEMU PUTIH (Curcuma zedoaria (Berg.) Roscoe) Wiwik Susanah Rita
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

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Isolation, identification, and antibacterial activity examination of triterpenoid compounds from rhizome ofCurcuma zedoaria (Berg.) Roscoe have been conducted. Maseration of 600 g dry powder of those rhizome using nhexaneand ethanol respectively yielded 9,79 g of n-hexane extract and 23,45 g of ethanol extract. The ethanolextract containing triterpenoids was dissolved into ethanol-water (7:3) mixture. The mixture was evaporated toremove the ethanol and then partitioned by chloroform. Hence, two extract were produced i.e., chloroform and waterextract. The n-hexane and chloroform extracts obtained contained triterpenoids based on fitochemical test ofLieberman-Burchard. Antibacterial test showed that only chloroform extract was active with inhibition zone of 2 mmfor Staphylococcus aureus.Compound separation of the chloroform extract using column chromatography produced 0,44 g brownisolate which contained triterpenoids (fraction F1). The isolate inhibited the growth of Staphylococcus aureus andEscherichia coli with weak inhibition zone at 500 ppm and 1000 ppm. Infrared spectra indicated that the isolate wasa carboxylic acids triterpenoids, with characteristic functional groups of –OH bonded, –CH, C=O of carboxylic acids,–C=C, –CH2, –CH3, and C–O alcohol. The ultraviolet-visible spectra showed maximum absorption at 242 nm and280 nm.

ADSORPSI ION FOSFAT OLEH LEMPUNG TERAKTIVASI ASAM SULFAT (H2SO4) Ida Norma Sinta; Putu Suarya; Sri Rahayu Santi
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

Activated clay can be used as an adsorbent to adsorb phosphate ions in solution. The aims of this research are to study the characteristics of the clay before and after activated (covering the surface acidity, surface area and basal spacing) and to study the adsorption capacity of activated clay to phosphate solution. The results showed, the activated clay gave surface acidity of 0.7202 mmol/g and 2.0018 mmol/g, surface area of 12.6602 m2/g dan 25.6101 m2/g, and d-spacing of montmorillonite was d (Å) = 0.12. The optimum condition for phosphate adsorption by this clay was found at 15 minutes contact time, pH 3, and concentration of 70 ppm yielding phosphate adsorption capacity of 3.0349 mg/g following the Langmuir isotherm.

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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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