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Isomerization of non-insecticidal α-hexachlorocyclohexane (HCH)to insecticidal γ-HCH by Pseudomonasstrain Ptm

Ramesha, N. and Karanth, N. G. K. (1999) Isomerization of non-insecticidal α-hexachlorocyclohexane (HCH)to insecticidal γ-HCH by Pseudomonasstrain Ptm. Applied Microbiology and Biotechnology, 53. pp. 120-126.

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Abstract

<p align="justify">Pseudomonas strain Ptm+ grew on α-hexa- chlorocyclohexane (HCH, CAS no. 319846), using it as the sole source of carbon and energy. In a replacement- culture study, with the non-insecticidal α-HCH, γ-HCH (CAS no. 58899) was the first metabolite noticed at 6 h, and transient accumulation of insecticidal γ-HCH oc- curred for up to 18 h. Although delta- (CAS no. 319868) and beta-isomers (CAS no. 319857) were also detected, their concentrations were very low. By 18 h of incuba- tion, about 23% of the α-HCH added was transformed into the gamma-isomer. Subsequently, the concentration of γ-HCH in the medium fell. Thin-layer chromatogra- phy, gas chromatography, gas chromatography-mass spectrometry and mosquito-larval bioassay analyses confirmed the formation of γ-HCH. This was associated with the formation of three more metabolites.</p>

Item Type: Article
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 26 Pesticide Chemistry
Divisions: Fermentation Technology and Bioengineering
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 16 Jun 2005
Last Modified: 28 Dec 2011 09:24
URI: http://ir.cftri.com/id/eprint/75

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