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.

Food contamination, Arctic regions, Quebec (Province), Heptachlor

---

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.

Cyclohexane, Lindane

---

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.

Evaluation, Measurement, Biological assay, Bioassay

Similar abstracts:

• Abstracts: Characterization of polychlorinated biphenyl isomers in Sovol and Trichlorodiphenyl formulations by high-resolution gas chromatography with electron capture detection and high-resolution gas chromatography-mass spectrometry techniques
• Abstracts: Distribution of aqueous chlorine with nitrogenous compounds: chlorine transfer from organic chloramines to ammonia
• Abstracts: The impact of the web on information and communication modes: The case of corporate environmental disclosure. The relativity of HR systems: Conceptualizing the impact of desired employee contributions and HR philosophy
• Abstracts: The impact of the web on information and communication modes: The case of corporate environmental disclosure. part 2
• Abstracts: Chemistry of the hexahydropyrrolo [2, 3-b] indoles: Configuration, conformation, reactivity, and applications in synthesis

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.