| polychlorinated biphenyl |
A group of commercially produced organic chemicals used since the 1940s in industrial applications throughout the nuclear weapons complex. PCBs are found in many of the gaskets and large electrical transformers and capacitors in the gaseous diffusion plants. They can be toxic to humans and animals.
출처: legacystory.apps.em.doe.gov/text/link/link12.htm
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| polychlorinated biphenyls |
PCBs form a group of compounds which were developed in the 1930s and were mainly used in the electricity supply industry and mining. Due to their accumulation in the food chain, production of PCBs was halted world-wide at the beginning of the 1980s and in 1996 an EC Directive was agreed requiring a phase-out of continuing uses (mainly in ageing electrical equipment). PCBs are, however, still found in trace concentrations in the sea and in the fatty tissue of marine animals.
출처: www.eurochlor.org/tools/glossary/glossary.htm
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| polychlorinated biphenyls |
A class of chlorinated aromatic compounds composed of two fused benzene rings and two or more chlorine atoms; used in heat exchange, insulating fluids and other applications. There are 209 different PCBs. 2) A group of manufactured chemicals including 209 different, but closely related, compounds of carbon, hydrogen, and chlorine. If released to the environment, they persist for long periods of time and can biomagnify in the food web. ...
출처: response.restoration.noaa.gov/cpr/watershed/calcas...
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| polychlorinated biphenyls |
a group of synthetic, toxic industrial chemical compounds once used in making paint and electrical transformers, which are chemically inert and not biodegradable. PCBs were frequently found in industrial wastes, and subsequently found their way into surface and ground waters. As a result of their persistence, they tend to accumulate in the environment. In terms of streams and rivers, PCBs are drawn to sediment, to which they attach and can remain virtually indefinitely. ...
출처: mvhs1.mbhs.edu/riverweb/glossary.html
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| polychlorinated b. |
any of a group of substances in which chlorine replaces hydrogen in biphenyls, used as heat-transfer agents and as insulators in electrical equipment. They are chemically very stable and accumulate in animal tissues, causing a variety of toxic effects including carcinogenesis.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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