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Jurnal Kimia (Journal of Chemistry)
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 12 Documents
 1   2 
Search results for , issue "Vol. 5, No. 1 Januari 2011" : 12 Documents clear
AKTIVITAS LARVASIDA MINYAK ATSIRI PADA DAUN SIRIH (Piper betle Linn) TERHADAP LARVA NYAMUK Aedes aegypti I Made Oka Adi Parwata; Sri Rahayu Santi; I Made Sulaksana; Ida Ayu Alit Widiarthini
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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Abstract

Isolation and larvacide activity of essential oil from Piper betle Linn were studied. Approximately 13,5 mL of essential oil was obtained from 10,0 kg fresh leaves of Piper betle Linn. The oil is pale yellow with density of 0,7148 g/mL. Phytochemical test indicates that the content of the oil are terpenoid and phenol compounds with toxicity Aedes aegypty larvae 0f LC50= 309,03 ppm. The essential oil was toxic towards Aedes aegypty larvae because it contains phenol compounds, i.e. Eugenol, cavichol.GC-MS analysis reveals that there are 9 compound, i.e. 4-methyl(1-methylnethyl)-3-cyclohexen-1-ol, 1-methoxy-4(1-propenyl) benzene, 4-(2-propenyl)phenol/cavicol, 4-alylphenylacetate, Eugenol, Karyofilen, 3-alyl-6-methoxyphenylacetate, 4-alyl-1,2-diacetoxybenzene and decahydro-4a-methyl-1-methylene-7(1-methylethenyl) naphthalene.Based on the peaks intensity the oil was dominated by 4 compounds i.e. 4-allyl phenyl acetate, 2 methoxy-4-(2 prophenyl) phenol/eugenol, 3-allyl-6-methoxy phenyl acetate, 4-(2-prophenyl)-phenol / cavicol. These four compounds probably act as the active compounds to kill Aedes aegypty larvae, as they are acetate and phenol compounds.
PEMANFAATAN BATU PADAS JENIS LADGESTONE TERAKTIVASI NaOH DAN TERSALUT Fe2O3 SEBAGAI ADSORBEN LARUTAN BENZENA I Nengah Simpen; I Made Sutha Negara; Ida Ayu Agung Pradnyani
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (141.374 KB)

Abstract

This paper describes the adsorption of benzene by ledgestone which was activated with 4 M NaOH and coated with Fe2O3. The proportions of ledgestone and the coating used were of 10 : 1, 50 : 1, and 100 : 1. The aim of this study was to find out the ability of the stone in decreasing benzene concentration in solution. The study included the determination of surface acidity by acid-base titration, characterization of the ledgestone specific surface area by the method of blue methylene, determination of equilibration time of the stone in adsorbing benzene and determination of adsorption capacity of the stone referred to Freundlich isotherm adsorption by the application of gas chromatography.The result showed that the highest surface acidity of 0.2980 mmol/g was given by the ledgestone that was activated with 4 M NaOH and coated with Fe2O3 with the proportion of 10 : 1 and washed by aquadest. This ledgestone also showed the highest adsorption capacity which was 44.1286 ?g/g. The control ledgestone had specific surface area of 35.880 m2/g. The ledgestone that was activated with 4 M NaOH and coated with Fe2O3 resulted in higher adsorption capacity to benzene than the control ledgestone did.

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