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.

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 ?
Perinatal exposure to Aroclor 1254 impairs distortion product otoacoustic emissions (DPOAEs) in rats.
For example, Aroclor 1254 has 42 percent chlorine by weight, while Aroclor 1260 has 54 percent chlorine by weight [1].
Inhibition of Aroclor induced S9-mediated mutagenicity of cooked food mutagens by dibenzoylmethane in TA98 strain of Salmonella typhimurium.
Previous studies done in our lab using large amounts of the PCB mixture Aroclor 1254[R] (62.
Environmental pollutant Aroclor 1242 (PCB) disrupts reproduction in adult male Rhesus monkeys (Macaca mulatta).
typhimurium TA100 in the presence of Aroclor 1254-induced rat liver S9 mixture.
Board 11 EFFECTS OF AROCLOR 1254O ON ENDOCRINE, AND BEHAVIORAL MEASURES IN 30-DAY-OLD RATS BREED FROM PARENTS EXPOSED TO AROCLOR 1254O FOR ONE YEAR.
Previous work has shown that Aroclor 1254 (a mixture of PCB congeners) consumed during pregnancy and lactation resulted in smaller offspring, offspring with depressed circulating levels of [T.
PCB28, PCB77, Aroclor 1242) has been reported to result in lower bacterial numbers (Correa et al.
2) These commercial PCBs were sold in the United States under dozens of different trade names, of which the most commonly known was Aroclor.
In a 1-month study, chronic developmental exposure to the PCB mixture Aroclor 1254 was associated with increased body weights of mouse pups on postnatal days (PNDs) 16-20 (Branchi et al.