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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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PEMANFAATAN ZAT WARNA ALAM DARI EKSTRAK KULIT AKAR MENGKUDU (Morinda citrifolia Linn) PADA KAIN KATUN Mariance Thomas; Manuntun Manurung; I. A. Raka Astiti Asih
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 2 Juli 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The research about utilization of natural dyes from root bark extract of Morinda citrifolia on cotton fabric has been done. The extraction of root bark morinda was done by using water and methanol as solvent with ratio of 1:20 (w/v) (10 g sample : 200 mL solvent). The extract obtained from water was blackish brown, while from methanol solvent was reddish brown. The extract obtained was used to dye cotton fabric with addition of 1.00 g whiting as a mordant. Extracts of both solvents can dye cotton fabrics with varied colors : yellow, red, and red purple. Mordant can strengthen the bond between the fiber and dyes and sharpen the fabric color. Endurance test by using 0.5% detergent water to soak for 15 minutes, showing the colour of fabric without mordant easily fade, whereas the colour with mordant of whiting do not easily fade.

STIGMASTANE-STEROID FROM THE BARK OF Chisocheton lasiocarfus (Meliaceae) Nurlelasari Nurlelasari; Fajar Fauzi Abdullah; Nadya Thufaila; Rani Maharani; Desi Harnet; Ace Tatang Hidayat; Unang Supratman
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

Stigmastan-steroid, stigma-4-ene-3-on (1) has been isolated from the bark of Chisocheton lansiocarpus. The chemical structure of stigmastan-steroid was identified based on spectroscopic data and by comparison of spectral data obtained previously. The discovery of stigma-4-ene-3-on in C. lansiocarpus was shown in this study for the first time.

SENYAWA ANTIMAKAN TERHADAP Epilachna Sparsa DARI BATANG GAYAM (Inocarpus fagiferus Fosb.) I M. Sukadana; S. R. Santi; N. N. T. Hanayanthi
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

Epilachna sparsa is one of the plant pests that damage the epidermal layer on the bottom side of the leaves, so it can lead to damage of leaf tissue and only the skeleton remains. Gayam (Inocarpus fagiferus) is one of the species of the Legumineceae family which has insecticide activity. This study aims to isolate and identify the antifeedant triterpenoid compound from stem of gayam (Inocarpus fagiferus Fosb.) against Epilachna sparsa larvae. Dried powder of 1200 g gayam stems produced 17.82 g of crude methanol extract with antifeedant activity of 60.74% at a concentration of 5% (w/v) which was further separated by partition to obtain n-hexane, ethyl acetate, and water extracts. Extracts of n-hexane, ethyl acetate, and water at 5% (w/v) concentration showed antifeedant activity of 46.74%, 18.09%, and 8.31% respectively. Futhermore, the most active n-hexane extract was identified by phytochemical tests and LC-MS/MS. The phytochemical test showed n-hexane extract contains triterpenoid compounds. The mass spectra from LC-MS/MS chromatogram peaks with MassLynx V4.1 software and Chemspider database for n-hexane extracts which were previously purified by SPE (Solid method) Phase Extraction) using methanol and dichloromethane (DCM) eluents show the presence of components of flavonol pyrogallol, sucrose2,3,3 ', 4', 6-pentaacetate, soyasaponin I, and a compound with a molecular weight of 685,225 g/mol which cannot be identified further because there is no match spectra with the database. Keywords: antifeedant, Epilachna sparsa, gayam, Inocarpus fagiferus Fosb., triterpenoid.

ISOLASI DAN UJI AKTIVITAS ANTIBAKTERI MINYAK ATSIRI DARI RIMPANG LENGKUAS (Alpinia galanga L.) I M. Oka Adi Parwata; P. Fanny Sastra Dewi
Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 2 Juli 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 (285.926 KB)

Isolation and antibacterial activity test of the languas rhizomes (Alpinia galanga L.) essential oil was carriedout The extract was yellow in colour with a volume of 3,5 mL.The activity test on E. coli bacteria at concentrations 100 ppm and 1000 ppm showed a retardation area of 7mm and 9 mm in diameters. At 1000 ppm it retarded S. aureus bacteria to a diameter of 7 mm. Gas Chromatography– Mass Spectrometer data show that the essential oil of the languas rhizomes contains mainly 8 components : Dlimonen;Eukaliptol; 3-sikloheksen-1-ol, 4-metil-1-(1-metietil); Fenol, 4-(2-profenil)-asetat; 2,6-oktadien-1-ol, 3,7-dimetil-asetat; 1,6,10-dodekatrien, 7,11-dimetil-3-metilen; Pentadesen; sikloheksen, 1-metil-4-(5-metil-1-metilen-4-heksenil.

ANALISIS KUALITATIF SENYAWA PARASETAMOL (ACETAMINOPHEN) PADA URIN DAN RAMBUT MENGGUNAKAN KROMATOGRAFI GAS – SPEKTROMETRI MASSA (GC-MS) Komang Ari Gunapria Darmapatni; A. A. Bawa Putra; Ni K. Ariati; Ni M. Suaniti
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

Paracetamol (acetaminophen) is one of analgesic-antipyretic drugs which can be commercially obtained. The research aimis to analyze qualitatively the presence of paracetamol (acetaminophen) in urine and human hair by gas chromatography-mass spectrometry (GC-MS). Urine and human hair sample were obtained from patients (volunteers) who consume paracetamol in therapeutic dose without consumption patterns change. Extraction of paracetamol in urine used ethyl acetate and in human hair used methanol. The extract was then derivatized with BSTFA and 1% TMCS and analyzed using gas chromatography-mass spectrometry (GC-MS). The result showed that urine samples after 1, 2, and 3 hours consuming paracetamol contained acetaminophen-TMS. Those after 24, 168, and 720 hours after consuming paracetamol did not contain acetaminophen-TMS. In human hair, the acetaminophen-TMS was found in samples of 1, 2, 3, 24, 168, and 720 hours after consuming paracetamol.

ISOLASI DAN IDENTIFIKASI SENYAWA GOLONGAN FLAVONOID DARI MADU K ELENGKENG (Nephelium longata L.) Ida Ayu Raka Astiti Asih; Ketut Ratnayani; Ida Bagus Swardana
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 1 Januari 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 (203.213 KB)

The determination of anti free radical activity on longan honey (Nephelium longata L.) by DPPH method using UV-Vis sphectrophotometry and identification of chemical compound in non polar and semi polar fraction have been done. Longan honey was diluted with methanol and then partied by n-hexane and ethyl acetate. The absorbance was measured at 497 nm, 517 nm, and 537 nm for the DPPH concentration of : 0,001%, 0,002%, 0,003%, and 0,004% and the chemical compound was identified by phytochemical method.The result showed that part of n-hexane and ethyl acetate probably consist of chemical compound of isoflavone and value of anti free radical activity on longan honey in semi polar fraction was higher than in non polar fraction which were 91,71% and 77,68% at DPPH concentration of 0,001% (b/v).

PENGARUH WAKTU INKUBASI TERHADAP AKTIVITAS LIPASE YANG DIINDUKSI DENGAN MINYAK JELANTAH PADA TANAH DARI HUTAN MANGROVE PANTAI SUWUNG KAUH BALI A A I A Mayun Laksmiwati; I Nengah Wirajana; Diah Suci
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 2 Juli 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Tanah hutan mangrove Pantai Suwung Kauh Bali dimanfaatkan sebagai sumber penghasil enzim, salah satunya adalah lipase. Penelitian ini bertujuan untuk mengetahui besarnya aktivitas lipase dengan dan tanpa penambahan minyak jelantah dan pengaruh waktu inkubasi terhadap aktivitas lipase tanah hutan mangrove. Metode titrasi asam-basa digunakan dalam pengukuran aktivitas lipase dengan waktu inkubasi selama 0,1,2,3,4,5,6 dan 7 hari. Hasil penelitian menunjukkan bahwa penambahan minyak jelantah dapat meningkatkan aktivitas lipase. Peningkatan aktivitas lipase diduga disebabkan oleh lipida yang terkandung dalam minyak jelantah dapat menginduksi lipase dari mikroorganisme lipolitik yang ada dalam tanah. Aktivitas lipase tertinggi diperoleh sebesar 0,0996 U/mL dengan penambahan minyak jelantah pada inkubasi hari ke-6. Aktivitas lipase dengan penambahan minyak jelantah dan dengan aerasi dihasilkan aktivitas lipase yang lebih tinggi sebesar 0,1250 U/mL dengan waktu inkubasi 5 hari. Waktu inkubasi berpengaruh nyata terhadap aktivitas lipase pada tanah hutan mangrove dengan dan tanpa penambahan minyak jelantah.

KARAKTERISASI BATU KAPUR ALAM BUKIT JIMBARAN BALI Y. Ulfa; A.A. B. Putra; I N. Simpen
Jurnal Kimia (Journal of Chemistry) Vol.13 No.1 Januari 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

This research is about the characterization of naturar limestone in the Bukit Jimbaran area of Bali. The aim of this research was to learn chemical composition and micromorphology of Bukit Jimbaran limestone. The research was conducted in sequential steps as described below i.e. the limestone was grinded and sieved in size of 0.25-0.50 mm. Fine limestone, then was heated by using oven at 1000 C for 24 hours and analyzed by FTIR, XRD and SEM. The Spectra of FTIR showed that O-H, C-H, and C-O were dominantly functional groups, which composed CaCO3 and CaO. The results of CaO crystal measurements using Scherrer equation is 51,39 nm. Micromorphology observation by using SEM showed size shaped (vaterite) of Bukit Jimbaran limestone

ISOLASI DAN IDENTIFIKASI SENYAWA TERPENOID YANG AKTIF ANTIBAKTERI PADA HERBA MENIRAN (Phyllanthus niruri Linn) I W. G. Gunawan; I G. A. Gede Bawa; N. L. Sutrisnayanti
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 (1497.774 KB)

Isolation and identification of terpenoid, antibacterial compounds meniran herb (Phyllanthus niruri Linn) by GasChromatography – Mass Spectroscophy were carried out. Two kinds of extraction, i.e. maseration using methanoland the sochlet using n-hexane were employed.The extract obtained were contains terpenoids basedon fitochemical test of Liberman-Burchard n-hexaneextract was tested for antimicrobial activity against Escherichia coli ATCC® 25292 and Staphylococcus aureusATCC® 25293. In this study we obtained that n-hexane extract by sochlet extraction showed greater activitycompared to the extract by maseration with methanol, as indiated by disc diameter of inhibition zone. Diametricinhibition zone for these two extract are 1 mm for Escherichia coli and 0,5 mm for Staphylococcus aureus, formethanol extract, and where are 10 mm for Escherichia coli and 12 mm for Staphylococcus aureus for n-hexaneextract.The n-hexane extract was then purified using column chromatography. The pure extract was analyzed usingGas Chromatography - Mass Spectroscophy. Gas Chromatography - Mass Spectroscophy data indicated that theextract contains two compounds, i.e. phytadiene [ M+ ] 278 and 1,2 seco – cladiellan m/z 335 [ M+ - H ].

OPTIMASI ADSORPSI Cr(VI) PADA SILIKA GEL DARI ABU SEKAM PADI TERMODIFIKASI DIFENILKARBAZIDA (Si-DPZida) Henny Puspa Dewi Giri; I Wayan Sudiarta; Ida Ayu Raka Astiti Asih
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

Adsorption of chromium (VI) on silica gel modified by diphenilcarbazide (Si-DPZida) have been studied. Parameters analyzed were surface acidity by acid-base titration method, specific surface area by absorption of methylene blue method, optimum conditions of adsorption (pH, contact time), and isotherm adsorption. The results showed that Si-DPZida adsorbent has surface acidity (Kal) of 1,5996 mmol/g with the number of active sites of 9,6328 x 1020 atom/g with specific surface area of 4.4538 m2/g. The optimum adsorption process of chromium (VI) by both Si-DPZida occurred at pH 5 and 15 minutes of contact time. The isotherm adsorptions on both adsorbents tend to follow Freundlich adsorption pattern.

Page 36 of 52 | Total Record : 518

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Ni Putu Diantariani

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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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