cover
Article Per Year (5 Year)
All
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
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 13 Documents
 1   2 
Search results for , issue "Vol. 4, No. 1 Januari 2010" : 13 Documents clear
PREPARATION AND CHARACTERIZATION OF PbSe THIN FILMS BY CHEMICAL BATH DEPOSITION Anuar Kassim; Tan Wee Tee; Dzulkefly Kuang Abdullah; Md. Jelas Haron; Ho Soon Min; Shanthi Monohorn; Saravanan Nagalingam
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.394 KB)

Abstract

PbSe thin films were grown onto glass substrates by chemical bath deposition method. Structure and surfacemorphology of thin films were characterized by X-ray diffraction and scanning electron microscopy. The band gapenergy and type of optical transition were determined from optical absorbance data. The deposition parameters wereoptimized to obtain good quality of thin films. X-ray diffraction indicates that the films have cubic structure. TheSEM micrograph showed the films do not cover the glass substrate completely and consisted of irregular shapedgrains. The films show good optical properties with high absorption in the visible region and the band gap value wasestimated to be 1.3 eV.
AKTIVITAS ANTIBAKTERI SENYAWA FLAVONOID DARI KULIT AKAR AWAR-AWAR (Ficus septica Burm F) I M. Sukadana
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.374 KB)

Abstract

Isolation of flavonoid antibacterial compounds from Awar-awar root skin (Ficus septica Burm.f) has beencarried out. As much as 120.0 g of concentrated methanol extract was resulted from 3.9 kg dry powder of Awar-awarroot skin. About 60.0 g of this extract was dissolved into 2 N hydrochloride acid and then partitioned withchloroform. Extraction of the acid extract using chloroform resulted in 0.82 g of chloroform concentrated extractwhich contained flavonoids. Further, the separation of this extract using column chromatography resulted in 8fractions namely F1, F2, F3, F4, F5, F6, F7 and F8 fraction. The result of flavonoid test of the eight fractions suggestedthat F2, F5, and F6 fractions contained flavonoid compounds. The purification of F2 fraction using n-hexane obtained 2fraction F2.1 and F2.2 (0.13 g and 0.01 g respectively). Infra red and ultra violet-visible spectroscopy were employed inorder to identify the F2.1 fraction. From infra red spectra, it was identified that the isolate had –OH, C=O, C=C andC-H aromatic and C-H aliphatic. The ultra violet-visible spectra showed 2 peaks at 328.6 nm (band I) and 281.5 nm(band II) which indicated flavonoid class compounds flavanon or dihidroflavonol. By using ”shitting” reagent theisolate was suggested to contain flavanon group with hydroxy groups at C-2’, C-5’ or C-6’ and C-8, and methyl orglycosilacy goups at C-5 and C-7 atom. The isolate flavanon showed antibacterial activity toward Vibrio cholera andEschericia coli.
SINTESIS SENYAWA orto-FENILAZO-2-NAFTOL SEBAGAI INDIKATOR DALAM TITRASI I W. Suirta
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (668.165 KB)

Abstract

Synthesis of o-fenilazo-2-naphtol used as indicator in titration has been conducted in this research. Thesynthesis was carried out by coupling of diazonium chloride salt with 2-naphtol, and aniline. The product wascharacterized using spectroscopy techniques (IR, 1HNMR, and MS), while the pKHIn was determined using UV-visspectrometer. The application of the product as indicator in titration was compared to methyl-orange.The synthesis gave a red crystal with 62.51 % yield. Infra red spectra analysis showed the presence ofcharacteristic functional groups such as–OH, CH-aromatic, C=C, N=N, CN, CO, and a peak indicated substituents atortho position. 1HNMR showed three separated peaks. Mass spectra gave molecular ion peak (M+) at m/z 248. Thered crystal obtained melted at 128-131oC. Based on spectroscopy analysis and melting point, it can be concludedthat the product was o-fenilazo-2-naphtol. The product had a pKHin of 3.16, therefore it can be used as indicator foracid-base titration which showed equivalent point at pH 5.

Page 2 of 2 | Total Record : 13

 1   2 

Filter by Year

2010 2010


Reset
Filter By Issues
All Issue Vol. 18, No.2, Juli 2024 Vol. 18, No.1, Januari 2024 Vol. 17, No.2, Juli 2023 Vol. 17, No.1, Januari 2023 Vol. 16, No.2, Juli 2022 Vol. 16, No.1, Januari 2022 Vol. 15, No.2, Juli 2021 Vol. 15, No.1, Januari 2021 Vol. 14, No. 2 Juli 2020 Vol.14 No.1 Januari 2020 Vol.13 No.2 Juli 2019 Vol.13 No.1 Januari 2019 Vol.12 No.2 Juli 2018 Vol. 12 No.1 Januari 2018 Vol. 11. No.2 Juli 2017 Vol. 11. No. 1 Januari 2017 Vol. 10, No. 2 Juli 2016 Vol. 10, No. 1 Januari 2016 Vol. 9, No. 2 Juli 2015 Vol. 9, no. 1 Januari 2015 Vol. 8, No. 2 Juli 2014 Vol. 8, No. 1 Januari 2014 Vol. 7, No. 2 Juli 2013 Vol. 7, No. 1 Januari 2013 Vol. 6, No. 2 Juli 2012 Vol. 6, No. 1 Januari 2012 Vol. 5, No. 2 Juli 2011 Vol. 5, No. 1 Januari 2011 Vol. 4, No. 2 Juli 2010 Vol. 4, No. 1 Januari 2010 Vol. 3, No. 2 Juli 2009 Vol. 3, No. 1 Januari 2009 Vol. 2, No. 2 Juli 2008 Vol. 2, No. 1 Januari 2008 Vol. 1, No. 2 Juli 2007 Vol. 1, No. 1 Januari 2007 More Issue