polychlorinated biphenyl

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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.
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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Pregnant rats were exposed to vinclozolin (VIN), Aroclor 1,221 (A1221), or the vehicle (VEH) dimethylsulfoxide (DMSO) daily from E8-E18.
U20S CALUX cells, transfected with ER[alpha] and a reporter gene, were exposed to MC in the presence of rat liver S9 induced with Aroclor 1254 or [beta]NF/PB (Tab.
PCB analysis by Method 608 is difficult because the Aroclor pattern changes with weathering often resulting in samples containing PCBs being reported as not detected.
Effects of polychlorinated biphenyl (Aroclor 1254) on steroidogenesis and antioxidant system in cultured adult rat Leydig cells.
Researchers have found Aroclor in a number of different species around the old chemical plant.
Estradiol 17 AY, measured in serum pools, decreased significantly in fish exposed to 30 mg and 50 mg Aroclor 1242 (600.30 104.14, 823.75 211.95 pg/ml) respectively.
The profiles of sites 2 and 6 indicated that, the major component was Aroclor 1254 by the dominance of penta-homologue with 43.68% [47], in addition to the persistency of the heavier congeners started from penta-CB congeners in aerobic conditions [51]; moreover penta-congeners are not volatile.
Post-mitochondrial fraction (S9 fraction) from rats treated with Aroclor 1254 was prepared according to Maron and Ames (Maron and Ames, 1983).
Antioxidant responses to benzopyrene and Aroclor 1254 exposure in the green mussel, Perna viridis.
Polychlorinated biphenyl mixture aroclor 1254-induced oxidative stress plays a role in dopaminergic cell injury.
The inhibitory effects of polychlorinated biphenyl Aroclor 1254 on Leydig cell LH receptors, steroidogenic enzymes and antioxidant enzymes in adult rats.
Arunakaran, "Impact of polychlorinated biphenyl Aroclor 1254 on testicular antioxidant system in adult rats," Human and Experimental Toxicology, vol.