Results 161 to 170 of about 6,235 (203)

Dioxin‐like and non‐dioxin like effects of polychlorinated biphenyls: Implications for risk assessment

Lakes & Reservoirs: Science, Policy and Management for Sustainable Use, 2002
AbstractPolychlorinated biphenyls (PCBs) are persistent, bioaccumulative and toxic contaminants in the environment. Individual PCB congeners exhibit different physicochemical properties and biological activities that result in different environmental distributions and toxicity profiles. The variable composition of PCB residues in environmental matrices
John P. Giesy, Kannan Kurunthachalam
openaire   +1 more source

Biosensor immunoassay for the screening of dioxin-like polychlorinated biphenyls in retail fish

Analytica Chimica Acta, 2008
Dioxin-like polychlorinated biphenyls (DL-PCBs) often make up the majority of the toxic equivalent (TEQ) contribution of dioxins found in fish samples. For the purpose of making risk assessments, it is therefore important to develop screening methods for determining TEQ concentrations of DL-PCBs in retail fish.
Tomoaki, Tsutsumi, Noriko, Miyoshi, Kumiko, Sasaki, Tamio, Maitani   +3 more
openaire   +2 more sources

Physicochemical characteristics of carbonaceous adsorbent for dioxin-like polychlorinated biphenyl adsorption

Chemosphere, 2011
It has been known that dioxin-like polychlorinated biphenyls (DL-PCBs) are present in almost all types of environments worldwide. Activated carbon treatment has been expected for the removal of DL-PCBs because it is a simple and low-cost removal technology.
Ayato, Kawashima, Misato, Katayama, Noriko, Matsumoto, Katsuhisa, Honda   +3 more
openaire   +2 more sources

Reassessment and update of emission factors for unintentional dioxin-like polychlorinated biphenyls

Science of The Total Environment, 2017
One of the major goals of the Stockholm Convention on Persistent Organic Pollutants is to continuously reduce the releases of unintentional persistent organic pollutants (POPs) such as polychlorinated dibenzo-para-dioxins and dibenzofurans (PCDD/PCDF) or polychlorinated biphenyls (PCB) from anthropogenic sources. Until now, most efforts have focused on
Wenwen, Gong, Heidelore, Fiedler, Xiaotu, Liu, Bin, Wang, Gang, Yu   +4 more
openaire   +2 more sources

Dioxin and Dioxin-like Polychlorinated Hydrocarbons and Biphenyls

1999
Publisher Summary This chapter reveals that the prominent members of the class of polychlorinated hydrocarbons are characterized by the molecular structure of dibenzo-p-dioxin, dibenzofuran, and biphenyl, with different chlorine substitution patterns at the aromatic rings.
Günter Koss, Detlef Wölfle
openaire   +1 more source

Non-dioxin-like and dioxin-like polychlorinated biphenyls in butter sampled from the Polish retail market

Food Additives and Contaminants: Part B, 2010
The aim was to investigate levels of polychlorinated biphenyls (PCBs) in butter available on the Polish retail market. A gas chromatography-based method was developed for the purpose of this study. An ion-trap mass spectrometer was used as a detection system with high-resolution chromatography.
M, Roszko, M W, Obiedziński, K, Szymczyk, M, Olkowski   +3 more
openaire   +2 more sources

Human CYP1B1-dependent genotoxicity of dioxin-like polychlorinated biphenyls in mammalian cells

Toxicology, 2020
Polychlorinated biphenyls (PCBs) are persistent organic pollutants and human carcinogens. It was reported that rat CYP1A1 and catfish CYP1A can hydroxylate 3,3',4,4',5-pentachlorobiphenyl (PCB 126) and 3,3',4,4'-tetrachlorobiphenyl (PCB 77), while potential roles of other CYP1 enzymes in the metabolism of dioxin-like (DL) PCBs remain unconfirmed.
Yuting Chen, Yifan Wu, Weiwei Xiao, Hansi Jia, Hansruedi Glatt, Ming Shi, Yungang Liu   +6 more
openaire   +2 more sources

UNCERTAINTY ANALYSIS OF DIOXIN-LIKE POLYCHLORINATED BIPHENYLS RELATED TOXIC EQUIVALENTS IN FISH

Environmental Toxicology and Chemistry, 2007
Abstract The toxic equivalent (TEQ) concept is widely used to assess toxicity potential of a dioxin-like chemical mixture. The TEQ approach converts concentrations of various dioxin-like compounds into a single concentration that is toxicologically equivalent to the most toxic dioxin compound, 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-
Satyendra P, Bhavsar, Alan, Hayton, Donald A, Jackson   +2 more
openaire   +2 more sources

Dietary intakes of polychlorinated dibenzo-p-dioxins, dibenzofurans and dioxin-like polychlorinated biphenyls in Spain

Food Additives and Contaminants, 2004
Congener-specific analyses of seventeen 2,3,7,8-substituted PCDD/Fs, three non-ortho and 8 mono-ortho dioxin-like polychlorinated biphenyls (PCBs) were performed on 258 Spanish foodstuff samples, mainly of animal origin, for 2000--03. Daily dietary intakes of PCDD/Fs and PCBs, expressed as toxic equivalents (WHO-TEQs), were estimated by combining food ...
Fernández Martín, Mario Antonio, Gómara, Belén, Bordajandi, Luisa R., Herrero, Laura, Abad Holgado, Esteban, Ábalos, Manuela, Rivera, Josep, González Carlos, María José   +7 more
openaire   +3 more sources

Biological monitoring of indoor-exposure to dioxin-like and non-dioxin-like polychlorinated biphenyls (PCB) in a public building

Toxicology Letters, 2012
The release of PCBs from sealant material in public buildings and the resulting indoor air levels have raised growing concerns about possible human health effects connected with this exposure. Ambient monitoring of PCBs in a public building has revealed a contamination with the more volatile lower chlorinated PCB 28, PCB 52 and PCB 101.
Thomas, Schettgen, A, Alt, D, Preim, D, Keller, T, Kraus   +4 more
openaire   +2 more sources