Persistent chlorinated cyclodiene compounds in ringed seal blubber, polar bear fat, and human plasma from Northern Quebec, Canada: identification and concentrations of photoheptachlor
Article Abstract:
The presence of photoheptachlor and other chlorinated cyclodiene compounds in biological samples from Northern Quebec, Canada, was examined. Results revealed that human plasma and seal blubber contained similar concentrations of chlordane, while in bear fat, the amount was up to six times higher. Total polychlorinated biphenyl (PCB) concentration in humans was ten times higher than that in seal blubber, while PCB concentration in bear fat was double that of humans. Photoheptachlor comprised 3.4% of total chlordane detected in polar bears, where it is more significant compared to humans or seals.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Fate and atmospheric concentrations of alpha- and gamma-hexachlorocyclohexane in Quebec, Canada
Article Abstract:
A study was conducted on the atmospheric concentration of lindane and alpha-HCH at Villeroy, Quebec, Canada. Time-series and resource recognition analyses showed that agricultural activities, particularly corn seeding, are mainly responsible for the release of lindane in the atmosphere. The relationship between lindane concentrations and temperature shows that desorption mechanisms are crucial in atmospheric lindane buildup.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Chicken embryo hepatocyte bioassay for measuring cytochrome P4501A-based 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalent concentrations in environmental samples
Article Abstract:
A new bioassay based on chicken embryo hepatocyte is proposed as a tool for measuring cytochrome P4501A-based 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalent (TCDD-EQ) concentrations in environmental samples. The new bioassay is shown to be an efficient, cost-effective method for measuring TCDD-EQ concentrations.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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