June 2013
Preconcentration of benzene and phenolic compounds in water sample by adsorption on Carbon nanotubes coated fiber
A simple method has been developed for the preconcentration of benzene and phenolic compounds (BPC) by the adsorption of its carbon nanotubes (CNTs). The preconcentration of benzene and phenolic compounds (BPC) are ubiquitous pollutants, and many of them are carcinogenic or mutagenic. Carbon nanotubes (CNTs) are a kind of novel and interesting carbon material which can be used for separation and purification. In this...
June 2013
Preparation of Cobalt (III) complexes with trans-1,2-diaminocyclohexane N,N,N’,N’-tetra acetatic acid (CDTA) and ethylenediamine tetraacetic acid (EDTA)
The preparation and isolation of complexes trans 1,2 diaminocyclohexane N, N, N’, N’- tetraacetato cobalt (III) [Co(CDTA)] - and ethylenediamine-tetraacetato cobaltate (III) [Co(EDTA)]- by direct oxidation of cobalt (II) with peroxodisulfate ion in the presence of Ag+ ion as a catalyst is being reported. The stoichiometry of the complexes has been confirmed through spectroscopic techniques i.e....
June 2013
The chemical composition of essential oil from the root of Cissampelos owariensis (p.beauv) and free radical scavenging activities of its extracts
Air dried root of Cissampelos owariensis (P.Beauv) on steam distillation yielded 0.82% (w/w) of essential oil. Gas chromatography–mass spectrometry (GC-MS) analysis of the oil resulted in the identification of 11 compounds, among which 1H-cyclopropa[a]naphthalene,1a, 2, 3, 5, 6, 7, 7a, 7b-octahydro-1, 1, 7, 7a-tetramethyl-,(1aR-1aa, 7a, 7aa, 7ba) was found to be the most abundant at 39%. The antioxidant...
June 2013
Ab-initio and DFT studies of the kinetics, mechanisms and thermodynamics of the gas-phase pyrolysis of ethyl bromide
The kinetics, mechanisms, thermodynamics and vibrational studies of the pyrolysis of ethyl bromide in the gas – phase at 623 K was studied using HF at 3-21G, 6-31G* and DFT with B3LYP/6 31G*, 6-311++G (2df, 2p) basis sets. The reaction proved to be a unimolecular reaction and followed a first order rate equation. The Arrhenius parameters, such as log A with HF at 3-21G, 6-31G* = 13.93, 13.86; DFT/B3LYP at 6-31G*,...
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