PCB


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biphenyl

 [bi-fen´il]
polybrominated biphenyl (PBB) any of various brominated derivatives of biphenyl; uses and toxic hazards are similar to those of polychlorinated biphenyls. They typically are deposited in body fat stores and are rarely mobilized except through lactation.
polychlorinated biphenyl (PCB) any of various chlorinated derivatives of biphenyl, toxic and carcinogenic nonbiodegradable compounds used as heat-transfer agents and electrical insulators; they are readily absorbed from the gastrointestinal tract, and those with a lower percentage of chlorine are associated with a higher toxicity but are more readily excreted.

PCB

Abbreviation for polychlorinated biphenyl.

PCB

polychlorinated biphenyl.

PCB

(pē′sē-bē′)
n.
Any of a family of industrial compounds produced by chlorination of biphenyl, used as insulating materials in electrical equipment, including transformers and capacitors, and in various other industrial applications. PCBs were banned in the United States in 1979 and now are noted primarily as environmental pollutants that accumulate in animal tissue with resultant pathogenic and teratogenic effects.

PCB

abbreviation for polychlorinated biphenyls.

PCB

polychlorinated biphenyl.
References in periodicals archive ?
The new study suggests that limiting breast-feeding might ameliorate some of the effect that PCBs have on immunity, but Grandjean stresses that it's not wise to discourage breast-feeding, even in such a heavily PCB-exposed population as the Faroese.
Prior to gas chromatography, these samples were processed using analytical methods used for the determination of PCBs in transformer oil.
Although transformers built after 1977 no longer have PCB oils in them, there is still a significant amount of contaminated equipment across the country.
The researchers had expected the women to have high PCB and mercury levels because they lived in the polluted St.
Another argument was that the PCB definition should be governed by the traditional definition of beneficiary.
Some environmentalists met the resumption of PCB imports with disbelief.
With retrofit or retrofill, the owner is responsible for the safe and compliant removal and transportation of all PCB liquids and contaminated materials.
Because of the potential hazards of PCBS, particularly those associated with the formation of toxic byproducts during a PCB fire, you run the risk of spending large amounts to clean up after a PCB incident.
However, China's PCB industry will experience a turning point, after the changes of the industrial environment at home and abroad in 2007.
Major PCB Companies Unimicron, Compeq, HannStar Board, Gold Circuit Electronics, Tripod Technology, Meiko, CMK, WUXI CMK, CMK GBM, CMKC DONGGUAN, IBIDEN, Daeduck Electronics, TTM, Unitech PCB, AT&S, Kingboard, Elec&Eltek, Tech-Wise Circuit, Express Electronics, SIMMTECH, T.
Some epidemiologic evidence suggests a link between PCB exposure during fetal development and subsequent cognitive problems in children, such as lowered overall IQ, attention and motor deficits, and impaired impulse control.
The differences between the groups offish indicate that PCB exposure triggers several adverse immunological changes, the scientists report in the January Environmental Toxicology Chemistry.