polychlorinated biphenyl


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Related to polychlorinated biphenyl: PCB

polychlorinated biphenyl

or

PCB,

any of a group of organic compounds originally widely used in industrial processes but later found to be dangerous environmental pollutants. Polychlorinated biphenyl is a fat-soluble, water-insoluble hydrocarbon containing chlorine. It is extremely stable, withstanding temperatures of up to 1,600°F; (870°C;), is fire-resistant, and has been used as a heat-transfer and insulating fluid in cooling systems and electrical equipment; it has also been used in sealants, rubber, paints, plastics, printing ink, and insecticides. The chemical has entered the environment largely as a pollutant from equipment leaks, the weathering of many materials that contain PCB, and through interaction with food products. PCBs are not readily biodegradable. Production has been banned in several industrialized countries; the United States stopped producing PCBs in 1977.

polychlorinated biphenyl

[¦päl·i′klȯr·ə‚nād·əd bī′fen·əl]
(organic chemistry)
Any member of the group of chlorinated isomers of biphenyl. Abbreviated PCB.
References in periodicals archive ?
A cohort study of behavioral problems and intelligence in children with high prenatal polychlorinated biphenyl exposure.
The team examined serum samples for suspected endocrine disruptors including DDT, DDE, 4 other chlorinated pesticides, and 10 polychlorinated biphenyls.
Monsanto invented polychlorinated biphenyls, PCBs, at their chemical plant in Anniston, Alabama, in 1929.
We also found that polychlorinated biphenyls (PCBs), toxaphene, dieldrin, dioxins, and polybrominated diphenyl ethers occurred at higher concentrations in European farm-raised salmon than in farmed salmon from North and South America.
The project, led by the Ministry of Environment and Sustainable Development, will achieve this goal by implementing environmental management systems of polychlorinated biphenyls in the energy sector stakeholders and strengthen the structure of provincial environmental authorities to ensure control and compliance Plan.
Chemical analysis simultaneously conducted showed higher than normal levels of dioxins in the liver, muscle, and fat, ie, polychlorinated dibenzodioxins, polychlorinated dibenzo-furans, and coplanar polychlorinated biphenyls.
SAN FRANCISCO -- Greater levels of polychlorinated biphenyls in the blood were associated with worse neuropsychological executive functioning in a study of 276 adults, Richard F.
However, as a new link in the Great Lakes food chain, Ricciardi worries, the fatty crustacean could boost concentrations of pollutants such as polychlorinated biphenyls in the larger fish.
The studies of pesticides and other contaminants that are very common, such as mercury, lead and polychlorinated biphenyls (PCBs), show that all are decreasing IQ levels," says Guillette.
Unlike their chemical cousins, dioxins and polychlorinated biphenyls (PCBs), environmental levels of PBDE compounds are increasing, as are concentrations found in human breast milk.
A new reference material (RM), RM 8504, has been prepared for use as a diluent oil with Aroclors in transformer oil Standard Reference Materials (SRMs) 3075 to 3080 and SRM 3090 when developing and validating methods for the determination of polychlorinated biphenyls (PCBs) as Aroclors in transformer oil or similar matrices.
The State of Wisconsin Department of Natural Resources (W-DNR), Madison, Wisconsin, USA says the long-awaited cleanup of polychlorinated biphenyls (PCB) began the week of September 13 at two of Wisconsin's worst PCB contamination sites, while work at third site moved into a critical phase during the same period.