Results 81 to 90 of about 6,590 (132)

HEXACHLOROCYCLOHEXANE IN SCABIES

Journal of the American Medical Association, 1949
To the Editor:— I am sorry if in my letter inThe Journal, Dec. 25, 1948, page 1253, undue stress was placed on the possible toxicity of hexachlorocyclohexane when used in the treatment of scabies. My chief concern was and is over the widespread use of this material in the South as an insecticide dust for cotton.
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Hexachlorocyclohexanes in human blood serum

Journal of Chromatography A, 1997
A simplified method allowing the determination of trace concentrations (ng/ml) of hexachlorocyclohexanes in human sera suitable for the analysis of large numbers of samples has been developed. Comparison of acid (conc. H2SO4,) and basic (5 M KOH) digestion has shown that good recoveries are obtained with the former when an internal standard, 1,2,4,5 ...
Raquel Otero, Joan O. Grimalt, Mary Santiago-Silva   +2 more
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Biochemical Effects Induced by the Hexachlorocyclohexanes

2011
The hexachlorocyclohexanes (HCHs) are synthetic compounds that have been widely used for the control of pests. The most common HCH isomers are the α-, β-, δ-, and γ-HCH. Although the have the same chlorine substitution pattern, the spatial orientation of chlorine atoms is different on each one of them, resulting in unique structures that have distinct ...
Angélica Guerrero-Castilla, Niradiz Reyes Ramos, Jesus Olivero-Verbel   +2 more
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Removal of α- and γ-Hexachlorocyclohexane and Enantiomers of α-Hexachlorocyclohexane in the Eastern Arctic Ocean

Environmental Science & Technology, 1999
Atmospheric concentrations of hexachlorocyclohexanes (HCHs) have declined over the last two decades, and the Arctic Ocean is now eliminating HCHs through degradation, volatilization, and advective outflow. Air and water samples were collected on a cruise of the eastern Arctic Ocean in July−September 1996 for HCHs and enantiomers of α-HCH.
Terry F. Bidleman, William M. J. Strachan, Henrik Kylin, Tom Harner   +3 more
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Biodegradation of Hexachlorocyclohexane in Soil

1995
The insecticide lindane (γ-HCH) is the most known HCH isomer. During HCH production only 17% of the reaction product is γ-HCH. The remaining part consists of α-, s-, δ- and e-HCH, that have an insignificant insecticide activity. These inactive isomers were discarded by the chemical industry (Bachmann et al., 1988a) which has caused large amounts of ...
D. Schmal, Huub H.M. Rijnaarts, W. N. M. van Heiningen   +2 more
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Biodegradation of γ-Hexachlorocyclohexane (Lindane) and α-Hexachlorocyclohexane in Water and a Soil Slurry by a Pandoraea Species

Journal of Agricultural and Food Chemistry, 2002
Isomers of 1,2,3,4,5,6-hexachlorocyclohexane (HCH) were some of the most widely used pesticides. Despite reduction in their production and use, HCH isomers present a serious environmental hazard. In this study, two bacterial isolates (LIN-1 and LIN-3) that can grow on gamma-HCH as a sole source of carbon and energy were isolated from an enrichment ...
William T. Frankenberger, Marta Camps Arbestain, Tariq Siddique, Benedict C. Okeke   +3 more
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TOXICITY OF HEXACHLOROCYCLOHEXANE IN SCABIES

Journal of the American Medical Association, 1948
To the Editor:— Recent contributors toThe Journalfound hexachlorocyclohexane to be an effective and safe treatment for scabies even when spread on and rubbed into the entire cutaneous surface of the body in a vanishing cream base (Canon and McRae,The Journal, Oct. 23, pp. 557-560).
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Hexachlorocyclohexanes in the Environment: Mechanisms of Dechlorination

Critical Reviews in Environmental Science and Technology, 2011
The hexachlorocyclohexanes (HCHs) are a very well known and widely studied class of organochlorine pesticides. Because of their widespread global usage over the past 5 decades, HCHs are ubiquitous in the environment. With the molecular formula of C6H6Cl6, there are 8 known HCH isomers, which differ in the axial versus equatorial orientation of the ...
Wei-xian Zhang, Shaolin Li, Daniel W. Elliott, Luming Ma, Stephen T. Spear   +4 more
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Decay of Hexachlorocyclohexane in Sea Water

Journal of the Fisheries Research Board of Canada, 1961
not available
M. Waldichuk, A. E. Werner
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Chemical oxidation and reduction of hexachlorocyclohexanes: A review

Water Research, 2019
Lindane (γ-hexachlorocyclohexane) and its isomers (HCH) are some of the most common and most easily detected organochlorine pesticides in the environment. The widespread distribution of lindane is due to its use as an insecticide, accompanied by its persistence and bioaccumulation, whereas HCH were disposed of as waste in unmanaged landfills ...
Stanisław Wacławek, Daniele Silvestri, Pavel Hrabák, Vinod V.T. Padil, Rafael Torres-Mendieta, Maria Wacławek, Miroslav Černík, Dionysios D. Dionysiou   +7 more
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