Wednesday, January 29, 2014

PCBs: Polychlorinated Biphenyls

PCBs PCBs: Polychlorinated Biphenyls Polychlorinated biphenyls atomic number 18 a family of man-made chemicals that withdraw two century and nine individual compounds with varying toxicity. legion(predicate) different combinations atomic number 18 possible. In chemical terminology, ?phenyl? denotes a ring structure of sixsome carbon atoms given up to something else; ?biphenyl? results when two such rings are attached to separately other. Polychlorinated biphenyl (PCB) is any molecule having multiple atomic number 17 atoms attached to the carbon atoms of a biphenyl nucleus. Chlorine atoms can be placed at any or all of x available sites. PCB?s have been used widely as coolants and lubricants in transformers, capacitors, and other electrical equipment. The manufacture of PCBs stopped in the United States in October 1977 because of evidence that PCBs accumulate in the ring and may cause health hazards for humans. Although PCBs are no lifelong manufac tured, human exposure still occurs. Many older transformers and capacito...If you loss to get a full essay, order it on our website: OrderCustomPaper.com

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