الإنجليزية - الإنجليزية
تعريف pcbs في الإنجليزية الإنجليزية القاموس.
- Polychloronated Biphenyls
- A group of toxic, persistent chemicals used in transformers and capacitors for insulating purposes, and in gas pipeline systems as a lubricant Further sale of new use was banned by law in 1979
- Polychlorinated biphenyls Sometimes found in electrical or hydraulic equipment
- Printed Circuit Boards Electronic boards used for internal cryostat wiring and filtering
- Palestinian Central Bureau of Statistics
- Polychlorinated biphenyls, a regulated hazardous chemical substance used in a wide variety of products and materials including, dielectric fluid in transformers, capacitors and light ballasts (see Fig 6) For more information visit the ATSDR website and search for "PCB" on the ToxFAQs http: //atsdr1 atsdr cdc gov
- 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
- Synthetic chemicals (polychlorinated biphenyls), manufactured from 1929 to 1977, found in electrical equipment, such as voltage regulators and switches, and used to cool electrical capacitors and transformers The manufacture of PCBs was banned in 1979, but there is still a great deal of PCB-contaminated equipment requiring disposal by utilities
- A group of toxic, persistent chemicals used in transformers and capacitors
- (polychlorinated biphenyls) are highly toxic substances contained in old electrical equipment installed in the 1950s, 60s and 70s The material is contained in the equipment as an insulating fluid in the capacitors and transformers Fluorescent light fittings installed during the same period may also contain PCBs
- Polychlorinated biphenyls Contaminants found in substances used as coolants and lubricants in transformers, capacitors, and other electrical equipment
- chemical compounds used for industrial purposes PCBs are environmental pollutants that tend to accumulate in human tissue and to disrupt the body’s endocrine system
- 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 Although virtually banned in 1979, they continue to appear in the flesh of fish and other animals
- (Polychlorinated Biphenyls) - Any molecule having multiple chlorine atoms attached to the carbon atoms of a biphenyl nucleus There are 209 possible combinations In the past, PCBs have been used in carbonless copy paper, newsprint, caulking compounds, hydraulic fluids, flame retardants, dielectric fluids, inks, dyes, paints, and adhesives