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Isomerization of γ-BHC to α-BHC in the Environment
Nature, 1973BECAUSE of the wide use of the persistent insecticide benzene hexachloride (BHC), its residues have been found in soils, plants, animals and foods. From the viewpoint of environmental toxicology, the principal residue problem of BHC is that particular isomers, such as α and β, but not the active γ isomer, accumulate in food1,2.
HERMAN J. BENEZET, F. MATSUMURA
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Ecochemistry of BHC in Czechoslovakia
Pure and Applied Chemistry, 1975Abstract
L. ROSIVAL, A. SZOKOLAY
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Bulletin of Entomological Research, 1952
An arsenic-resistant tick was first noticed in the East London district of South Africa in 1938–39. It was a strain of the one host blue tick, B. decoloratus. BHC was very toxic to the tick, as 50 p.p.m. of the gamma isomer killed adult females in in vitro experiments. Field results in 1946–47 were equally convincing.
A. B .M. Whitnall +4 more
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An arsenic-resistant tick was first noticed in the East London district of South Africa in 1938–39. It was a strain of the one host blue tick, B. decoloratus. BHC was very toxic to the tick, as 50 p.p.m. of the gamma isomer killed adult females in in vitro experiments. Field results in 1946–47 were equally convincing.
A. B .M. Whitnall +4 more
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Persistence of gamma‐BHC and beta‐BHC in Indian rice soils under flooded conditions
Pesticide Science, 1975AbstractThe relative persistence of [14C]‐gamma‐BHC and [14C]‐beta‐BHC in Indian rice soils under flooded conditions was studied. In alluvial, laterite and pokkali (acid sulphate, saline) soils, rapid degradation of both isomers occurred; in sandy and kari (acid sulphate, saline) soils, both isomers persisted even after 41 days of flooding.
Rangappa Siddaramappa +1 more
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γ-BHC: Its history and mystery – why is only γ-BHC insecticidal?
Pesticide Biochemistry and Physiology, 2015Among BHC isomers (benzene hexachloride, C6H6Cl6, theoretically eight ones), seven isomers (α,β,γ,δ,ε,η,ι) including one racemate (α) were isolated and their configurations were elucidated. Among the seven isomers, only γ-BHC has a potent insecticidal activity.
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Studies on BHC isomers and related compounds V. Some physicochemical properties of BHC isomers (1)
Pesticide Biochemistry and Physiology, 1973Abstract Physicochemical properties of biological interest were measured for hexachlorocyclohexane (benzene hexachloride) isomers, including solubility in water and in aqueous protein solutions, partition coefficients between organic solvents and water, and some “adsorption equilibrium” constants between the macromolecules and water.
Norio Kurihara +3 more
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Archives of Environmental Health: An International Journal, 1982
In an attempt to correlate body burden and related liver histopathology after exposure to 500 ppm benzene hexachloride, 6- to 8-wk-old male and female mice were fed benzene hexachloride with their mash diet for a 6-month period. The mice were divided into 8 groups (12/group; 6 experimental, 6 control) and were sacrificed by group monthly.
S K, Nigam +3 more
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In an attempt to correlate body burden and related liver histopathology after exposure to 500 ppm benzene hexachloride, 6- to 8-wk-old male and female mice were fed benzene hexachloride with their mash diet for a 6-month period. The mice were divided into 8 groups (12/group; 6 experimental, 6 control) and were sacrificed by group monthly.
S K, Nigam +3 more
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Institutional ownership stability and BHC performance
Journal of Banking & Finance, 2008Abstract In this study, the association between performance of BHCs and institutional ownership stability is investigated and contrasted to those found for the less regulated utility and industrial firms in order to determine whether regulation displaces owner monitoring.
Elyas Elyasiani, Jingyi Jane Jia
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2007
Assuming a basic understanding of the territory of primary care, the operational structures necessary for supporting a BHC practice, and the theories, interventions, and measures for practicing in the PCBH model, this chapter gives structure to PCBH clinical work. This is where deliberation turns to action.
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Assuming a basic understanding of the territory of primary care, the operational structures necessary for supporting a BHC practice, and the theories, interventions, and measures for practicing in the PCBH model, this chapter gives structure to PCBH clinical work. This is where deliberation turns to action.
openaire +1 more source