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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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PROSES BIOSORPSI DAN DESORPSI ION Cr(VI) PADA BIOSORBEN RUMPUT LAUT Eucheuma spinosum N. P. Diantariani; I W. Sudiarta; N. K. Elantiani
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 (98.389 KB)

Studies on biosorption and desorption of chromium (VI) on seaweed (Eucheuma spinosum) biosorben havebeen carried out. These studies included determination of biosorben acidity, optimum pH, contact time ofbiosorption, isoterm and biosorption capacity, and mechanisms of interaction between chromium (VI) and seaweed(Eucheuma spinosum) biosorben. Mechanisms of interaction were known with desorption chromium (VI) onseaweed biosorben using aquades, 1 M HCl and 0,05 M Na2EDTA.The result showed that the total acidity of seaweed biosorben was 4,1545 ± 0,3290 mmol/g, the optimum pHwas 5, and the contact time was 120 minute. Biosorption capacity of seaweed (Eucheuma spinosum) to chromium(VI) was 13,4992 mg/g. The highest desorption of chromium (VI) occurred with the use of aquadest which was40,69%. Whereas desorption using 1 M HCl and 0,05 M Na2EDTA were 4,84% and 0,20% respectively. This caseindicated that the main interaction mechanism of chromium (VI) on seaweed was hydrogen and Van der Waals bondwhich was relatively weak.

PROFIL TERAPI OBAT PADA PASIEN RAWAT INAP DENGAN DIARE AKUT PADA ANAK DI RUMAH SAKIT UMUM NEGARA Arifani Siswidiasari; Ketut Widyani Astuti; Sagung Chandra Yowani
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

The Diarrhea in children is the highest cause of morbidity and mortality in the world, especially in the developing countries. The purposes of this research are to describe about patient profile, the use of medicines profile and the treatment period in the RSU Negara. The research method used was a descriptive retrospective by taking medical records of childhood diarrhea patients in The Public Hospital RSU Negara from July to December 2012. The diarrhea type studied was acute diarrhea in children in age range of 0-14 years. The results showed that the drugs which were used for the acute diarrhea treatment in the Public Hospital of RSU Negara were: male (69.57%), female (30.43%), with age range: 0 - <1 year old (60.87%), 1 - <5 years old (34.78%), and 5 - <14 years old (4.35%). The highest classification of acute diarrhea were acute diarrhea with mild dehydration (63.04%) and without dehydration (36.96%). The use of antibiotics (89.13%), without antibiotics (10.87%), the use of ringer's lactate (93.48%), dextrose (13.04%), zinc (65.22%), antiemetic (58.69%), antipyretic (54.35 %), antacids (2.17%), H2 blocker (23.91%), probiotics (21.74%), synbiotics (34.78%), ORS (10.87%), dexamethasone (4.35%), dygestive enzymes (2.17%), nystatin (2.17%). The condition of diarrhea patient when they were released from the hospital were cured (67.39%), begins to be cured (32.61%), with various of treatment duration from 3 days (69.57%) , 4 days (23.91%), and 5 days (6.52%).

POTENSI KHITIN/ KHITOSAN DARI KULIT UDANG SEBAGAI BIOKOAGULAN PENJERNIH AIR Manuntun Manurung
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 potency of chitin/chitosan isolated from shrimp waste as coagulant to reduce turbidity of water have been studied in this research. The chitin/chitosan was isolated through some processes including deproteination, demineralization and deacetylation.The chitin/chitosan obtained was characterized using FTIR and the degree of deacetylation was calculated based on FTIR spectra. The deacetylation degree was found 64.86%, which mean the chitin mixed with chitosan or crude chitosan. In which using concentration 0.5% alumina can only reduce the turbidity of water by 54.21% while chitin/chitosan can reduce up to 90.37% the turbidity of water.

ISOLASI DAN UJI AKTIVITAS ANTIOKSIDAN SENYAWA FLAVONOID DARI EKSTRAK DAUN JAMBU BIJI PUTIH (Psidium guajava Linn) Egi Azikin Maulana; I. A. R. Astiti Asih; Made Arsa
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

Antioxidant is molecules that can inhibit the activity of free radical. White guava (Psidium guajava Linn) is one of many plants that have potential as antioxidant. This research was aimed to identify the flavonoid compounds and to determine IC50 values in the white guava leaf extract. Extraction was done by maceration method. The separation and purification was done by TLC and coloumn chromatography method. Flavonoid compound was identified using FTIR and UV-Vis spectrofotometry and antioxidant activity was tested with DPPH method. A 1000 grams of white guava leaf powder was extracted by n-hexane produced 103,40 grams of concentrated n-hexane extract and extraction procces by ethanol 70 % produced 128,49 grams of concetrated etanol extract. Eighty grams of ethanol extract partition produced 1.01 grams of n-hexane extract, 1.95 grams of chloroform extract, and 3.77 grams of n-butanol extract. The results of phytochemical test indicated that n-butanol extract positively contained flavonoids. The results of antioxidant activity towards DPPH from n-butanol extract showed IC50 of 37,14 ppm. The separation and purification n-butanol extract with n-hexane : ethyl acetate : n-butanol (8:2:1) as the eluent resulted 5 fractions (A, B, C, D, E), with C fraction positively contained flavonoids. FTIR analysis showed C isolates contained functional groups of CH aliphatic, CH aromatic, C = C aromatic, C = O, OH, and C - O. C fraction was analyzed with UV-Vis showing 2 peaks at ? 347.30 nm (band I) and ? 278.50 nm (band II) suggesting the presence of flavones group with possibility of OH groups attached to C-3, C-2’ atoms, ortho-dihydroxy groups attached to C-5', C- 6; C-4', C-5', and O-glycoside group at C-7 atom.

BIODEGRADASI ZAT WARNA NAPHTOL BLUE BLACK MENGGUNAKAN BIOSISTEM HORIZONTAL Y. P. Mau; I W. B. Suyasa1; I. E. Suprihatin
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

Warna naphtol blue black (NBB) banyak digunakan dalam pewarnaan kain pada industry rumah tangga. Kegiatan tersebut banyak menghasilkan air limbah yang mengandung zat warna yang mencemari linkungan perairan. Pengembangan biosistem horizontal dengan menambahkan konsorsium mikroorganisme untuk meningkatkan kinerja biosistem adalah alternative penanganan limbah cair. Penelitian ini bertujuan untuk menentukan suspensi aktif terbaik yang akan digunakan dalam pengolahan limbah NBB, kemampuan biosistem horizontal dalam menurunkan konsentrasi NBB. Proses pengolahan zat warna NBB pada penelitian ini menggunakan bak biosistem horizontal dengan adanya tanaman Typha angsutifolia serta penambahan suspensi aktif terbaik. Sumber suspensi aktif terbaik yang diperoleh dari Jalan Pulau Batanta . Potensi pertumbuhan konsorsium mikroba yang dihasilkan mencapai nilai pertumbuhan biomassa (MLVSS) sebesar 2386,7 mg/L. Berdasarkan hasil pengolahan limbah, biosistem horizontal efektif dalam menurunkan konsentrasi NBB 79,82%. Kapasitas dalam menurunkan konsentrasi NBB adalah 41, 647 mg / L / m3 jam. Dari hasil penilitian ini dapat disimpulkan bahwa biosistem horizontal mampu menurunkan konsentrasi NBB pada limbah zat warna. Kata kunci: biosistem horizontal, biodegradasi, naphtol blue black, Typha angustifolia

AKTIVITAS ANTIOKSIDAN DAN ANTIJAMUR SENYAWA ATSIRI BUNGA CEMPAKA PUTIH (Michelia alba) I Gusti Agung Gede Bawa
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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Isolation of white tropical magnolia’s (Michelia alba) essential oil by maseration method was carried out. Antifungal activity test was conducted by measuring resistibility against Candida albicans growth, whereas antioxidant activity test was conducted with spectroscopy technique by using Difenilpikril hidrazin (DPPH) as antifree radical. Compound contents analysis of the isolate was carried out by Gas Chromatography-Mass spectroscopy (GC-MS).From 1000 grams of white tropical magnolia’s flower 3.18 grams n-hexane extract, 1.19 grams of chloroform extract, and 0.88 grams of ethyl acetate extract were gained. The retardation area for the three extracts were 0 mm. Free radical damping percentage were 24.47% for the first 5 minutes and 79.14% after 60 minutes for n-hexane extract, 21.72% for the first five minutes and 25% after 60 minutes for chloroform extract, 21.93% for the first five minutes and 39.87% after 60 minutes for ethyl acetate extract. Compound analysis was carried out for n-hexane extract that have the highest antioxidant activity. GC-MS analysis showed that white tropical magnolia’s flower had 6 major component i.e. 1,3-Benzioxole,5-(2-propenyl), cyclohexane; 1-ethenyl-1-methyl-2,4-bis (1-methylethenyl); Butanoic acid; 3-methyl-,2-phenylethyl ester; 9,12-Octadecadienoic acid, methyl ester; Tricosane; Pentacosane.

BERBAGAI WAKTU PENYIMPANAN SECARA SPEKTROFOTOMETRI UV-VIS Dewa Ayu Ika Pramitha; Ni Made Suaniti; I Wayan Suarsa
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 describes the determination of lamivudine content in pulveres by UV-Vis spectrophotometry. The purpose of this study was to determine the stability of lamivudine in various storage times. In this study, the validation of the method of the determination of lamivudine standard was also investigated with the following results: the linear regression equation y = 0.045x - 0.005 with correlation coefficient (r2) of 0.9998. Furthermore the detection limits obtained was of 0.46 µg/mL, quantitation limit of 1.53 µg/mL, the coefficient of variation of 0.23%, accuracy of 3.59%, and the recovery was of 96.41%. The stability of lamivudine in the samples decreased during the observation period i.e. 0, 7, 14, 21, and 28 days, during which the contents of lamivudine obtained were 87.46%, 86.22%, 84.44%; 76, 87%, 79.38%, respectively.

DISTRIBUSI Pb DAN Cu PADA BERBAGAI UKURAN PARTIKEL SEDIMEN DI PELABUHAN BENOA E. Sahara
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

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This paper discusses the distribution of Pb and Cu in various particle sizes of sediment collected fromBenoa Bay, Bali. The particle sizes of sediment observed were >300; 300 – 100; 100 – 88,88 – 63 and <63 mm. Priorto the determination of both heavy metals, the sediments were digested with the mixture of HNO3 and H2O2 (1:1) at120oC. The measurements of the metal concentrations were performed by the use of Atomic AbsorptionSpectroscopy technique with the application of calibration method.It was found that the smaller the particle sizes the higher the metals concentraions were. The sediment of>300 mm contained Pb and Cu 0,74 – 0,77 mg/kg and 0,15 – 9,24 mg/kg, respectively. On the other hand, thesediment of < 63mm contained 21,36 – 53,01 mg/kg Pb and 104,14 – 132,82 mg/kg Cu. It was also observed thatthe distribution of particle sizes of all sediment collected from four sampling locations had similar patern.

BIOAVAILABILITAS DAN SPESIASI LOGAM BERAT Pb DAN Cd PADA TANAH PERTANIAN BASAH DAN KERING DI DAERAH DENPASAR I Made Siaka; Emmy Sahara; Gusti Agung Putu Merta Dharmayoga
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 the bioavailability and speciation of Pb and Cd in wet and dry soils in some agricultural areas in Denpasar has been carried out. Samples were taken from agricultural land in Peguyangan and Kesiman areas. This study was aimed to determine the total metal concentrations and the fractions of the species of Pb and Cd, as well as the level of the metal bioavailabilities. The study included the determination of the total Pb and Cd concentrations in the samples and extraction of the metal through the application of the sequential extraction technique followed by measurement of the metal with the Atomic Absorption Spectrophotometer. The result showed that generally the concentrations of Pb and Cd total in the wet soil from the two sampling areas were higer than those of the dry soil which were varied between 14,0484-16,1072 mg/kg and 1,5983-1,9885 mg/kg respectily.the results for Pb speciation in wet and dry soils from both locations as follows : the bioavailable fraction (EFLE fraction) and potentially bioavailable (consisting of Fe/Mn oxides and organic-sulfide fractions) were of 29,81%-83,66% and 2,44%-13,96 %, respectily, while the resistant (non-bioavailable) fraction were of 28,55%-55,11%. The results for Cd speciation in wet and dry soils from both locations were as follows : the bioavailable an potentially bioavailable fractions were of 28,62%-67,87% and 7,63%-48,39%, repectily, while the resistant (non-bioavailable) fractions were of 10,68%-30,92%.

ANTITUBERCULOSIS ACTIVITY OF METHANOLIC EXTRACT OF KEDONDONG HUTAN (SPONDIAS PINNATA (L.f.) Kurz.) LEAVES Ida Bagus Nyoman Putra Dwija; I Ketut Juniarta; Sagung Chandra Yowani; Ni Putu Ariantari
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

Tuberculosis remains global health problem nowadays. The presence of resistant strain of Mycobacterium tuberculosis against first and second line antiberculosis drugs, support any effort for discovering alternative and complementary therapy. Kedondong Hutan (Spondias pinnata (L.f) Kurz.) belongs to Anacardiaceae family, traditionally used to treat chronic cough, which is one of common symptoms of tuberculosis. The objective of this study was to investigate antituberculosis activity of methanolic extract of Kedondong hutan leaves against multidrug resistant strain of M. tuberculosis. Kedondong hutan leaves were extracted with methanol continued with phytochemical analysis. Antituberculosis activity assay of this extract was performed by proportion method using L-J medium. Extract was tested within 3 different concentration of 10, 50 and 250 mg/mL, with and without any additional rifampicin of 40 µg/mL. The observation of colonies was done every day started from 3rd week until 4th week and then analyzed qualitatively. The result of phytochemical analysis showed the presence of triterpenoids and flavonoids. Antituberculosis activity of kedondong hutan leaves extract at a concentration of 30 mg/mL was 52-73% and that ofcombination of 10 mg/mL extract + 40 µg/mL rifampicin was 85-89.5%. Extract concentration of 50 and 250 mg/mL, alone and combined with rifampicin showed growth inhibiton of 100%. In conclusion, methanol extract of kedondong hutan leaves has a potential antituberculosis activity.

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Ni Putu Diantariani

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jurnalkimia@unud.ac.id

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+628123640424

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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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