• Polychlorinated biphenyls (PCBs) are highly carcinogenic chemical compounds, formerly used in industrial and consumer products, whose production was banned in the United States by the Toxic Substances Control Act in 1976 and internationally by the Stockholm Convention on Persistent Organic Pollutants in 2001. (wikipedia.org)
  • The bromine analogues of PCBs are polybrominated biphenyls (PBBs), which have analogous applications and environmental concerns. (wikipedia.org)
  • PCBs are derived from biphenyl, which has the formula C12H10, sometimes written (C6H5)2. (wikipedia.org)
  • In PCBs, some of the hydrogen atoms in biphenyl are replaced by chlorine atoms. (wikipedia.org)
  • Furans (or PCDFs) have an oxygen atom forming a five membered ring (the furan) between the two benzenes of PCBs. (powershow.com)
  • Growth of organohalide-respiring bacteria such as Dehalococcoides mccartyi on halogenated organics (e.g., polychlorinated biphenyls (PCBs)) at contaminated sites or in enrichment culture requires interaction and support from other microbial community members. (bvsalud.org)
  • Some adverse effects of hydroxylated polychlorinated biphenyls (OH-PCBs) in humans are presumed to be initiated via thyroid hormone receptor (TR) binding. (bvsalud.org)
  • There are also macroscopic cycles, such as the rock cycle, and human-induced cycles for synthetic compounds such as polychlorinated biphenyls (PCBs). (dbpedia.org)
  • Polychlorinated Biphenyls (PCBs) Pollution in the Air" Encyclopedia , https://encyclopedia.pub/entry/33792 (accessed December 03, 2023). (encyclopedia.pub)
  • Polychlorinated biphenyls (PCBs) were widely used in industrial and commercial applications, until they were banned in the late 1970s as a result of their significant environmental pollution. (encyclopedia.pub)
  • Polychlorinated biphenyls (PCBs) are a group of toxic environmental pollutants categorized as persistent organic pollutants (POPs). (encyclopedia.pub)
  • Polychlorinated biphenyls (PCBs) are a group of synthetic aromatic chemicals. (encyclopedia.pub)
  • Chemical structure of PCBs (m and n denote number of chlorine atoms on each ring). (encyclopedia.pub)
  • It renders their structure similar to polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans, and allows them to act like PCDDs, as an agonist of the aryl hydrocarbon receptor (AhR) in organisms. (wikipedia.org)
  • Dioxins (or PCDDs) have two oxygen atoms linking the two benzene rings, forming the dioxin ring. (powershow.com)
  • AH receptors are identified by their high-affinity binding to several carcinogenic or teratogenic environmental chemicals including polycyclic aromatic hydrocarbons found in cigarette smoke and smog, heterocyclic amines found in cooked foods, and halogenated hydrocarbons including dioxins and polychlorinated biphenyls. (lookformedical.com)
  • Industrial products consisting of a mixture of chlorinated biphenyl congeners and isomers. (lookformedical.com)
  • The chemical structure of chlorinated biphenyls is shown in Figure 1 . (encyclopedia.pub)
  • Because of the recent attention given to human exposure to polychlorinated biphenyls (PCB's), polychlorinated dibenzofurans (PCDF's), polychlorinated dibenzo-p-dioxins (PCDD's), and related compounds resulting from electrical equipment fires or failures, we think it necessary to present a review of the pertinent data and a summary of findings related to the potential human health hazards of these compounds. (cdc.gov)
  • It renders their structure similar to polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans, and allows them to act like PCDDs, as an agonist of the aryl hydrocarbon receptor (AhR) in organisms. (wikipedia.org)
  • Numerous fire-related incidents involving electrical equipment containing polychlorinated biphenyls (PCB's) have resulted in widespread contamination of buildings with PCB's and, in some cases, with polychlorinated dibenzofurans (PCDF's) and polychlorinated dibenzo-p-dioxins (PCDD's), including 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). (cdc.gov)
  • In PCBs, some of the hydrogen atoms in biphenyl are replaced by chlorine atoms. (wikipedia.org)
  • Polychlorinated biphenyls (PCB's) * comprise a class of nonpolar chlorinated hydrocarbons with a biphenyl nucleus in which any or all of the hydrogen atoms have been replaced by chlorine. (cdc.gov)
  • 1 Commercial PCB's are mixtures of isomers of chlorinated biphenyls exhibiting varying degrees of chlorination. (cdc.gov)