Polychlorinated Biphenyls (PCB)
نویسنده
چکیده
Depending on the degree of chlorination of the PCBs, their physico-chemical properties, like inflammability or electric conductivity, brought about a wide field of application. Thus, PCBs have been used as electric fluids in transformers and capacitors, as pesticide extenders, adhesives, dedusting agents, cutting oils, flame retardants, heat transfer fluids, hydraulic lubricants, sealants, paints, and in carbonless copy paper. Some of their applications resulted in a direct or indirect release of PCBs into the environment. Relatively large amounts were released due to inappropriate disposal practices, accidents and leakages from industrial facilities.
منابع مشابه
Estimation of Polychlorinated Biphenyls Intake through Fish Oil-Derived Dietary Supplements and Prescription Drugs in the Japanese Population
Background: Oily fish and their extracted oils may be a source of polychlorinated biphenyls (PCBs) which can induce toxic effects on the consumers. The main aim of this survey was estimation of PCBs intake through fish oil-derived dietary supplements and prescription drugs in the Japanese population. Methods: PCBs levels were determined in 20 fish oil-derived dietary supplements and 6 oil-deri...
متن کاملPolychlorinated biphenyls in freshwater fish from the Zagreb area.
The aim of this study was to determine the levels of six polychlorinated biphenyls (referred to as PCB-28, PCB-52, PCB-101, PCB-138, PCB-153 and PCB-180, according to the IUPAC) in freshwater fish from the Zagreb area. A total of 216 samples was collected from five sites: from the Sava River upstream of Zagreb, in Zagreb, and downstream of Zagreb, from Lake Jarun, and from five fishponds from t...
متن کاملAn improved clean-up strategy for simultaneous analysis of polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF), and polychlorinated biphenyls (PCB) in fatty food samples.
The study and extension of a simple automated clean-up method for polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF) to a broad range of polychlorinated biphenyls (PCB) is described. The isolation of seven PCDD, ten PCDF, and three coplanar PCB (cPCB) is extended to eight monoortho substituted PCB and seven so-called "marker PCB" (Aroclor 1260) for fatty food samp...
متن کاملPolychlorinated Biphenyls in Human Milk, UHT Cow’s Milk and Infant Formulas
The content of polychlorinated biphenyls was determined in human milk collected from four regions of Poland, as well as in cow’s milk and infant formulas. Significant statistical differences in PCB levels were determined in human milk depending on the region. The highest PCB mean concentration (0.351 mg.kg-1 milk fat) was determined in human milk from Gdańsk. An average of 0.218 mg PCB kg-1 mil...
متن کاملComparative studies on the hypercholesterolaemia induced by excess dietary tyrosine or polychlorinated biphenyls in rats.
1. The effects of dietary polychlorinated biphenyls (PCB) and excess tyrosine on serum and liver lipids, urinary ascorbic acid and catecholamines were compared in male Wistar rats. 2. Serum levels of cholesterol, urinary ascorbic acid, norepinephrine, epinephrine, dopamine and histamine were significantly increased in rats given either PCB or excess tyrosine. 3. The hypercholesterolaemia induce...
متن کاملGuide for Polychlorinated Biphenyl (pcb) Management of Insulating Oil in South Africa
What are PCBs? PCBs (polychlorinated biphenyls) are a group of synthetic oil-like chemicals of the organochlorine family. It was first described in technical literature in 1881 and commercial production commenced in the late 1920s. Until their toxic nature was recognized and their use was banned in the early 1980s, they were widely used as insulation in electrical equipment, particularly trans...
متن کامل