Factors Affecting Phase I Stereoselective Biotransformation of Chiral Polychlorinated Biphenyls by Rat Cytochrome P-450 2B1 Isozyme

2011 ◽  
Vol 45 (19) ◽  
pp. 8298-8305 ◽  
Author(s):  
Zhe Lu ◽  
Charles S. Wong
Keyword(s):  
Polychlorinated Biphenyls ◽  
Phase I ◽  
Factors Affecting ◽  
Chiral Polychlorinated Biphenyls ◽  
Cytochrome P 450

Transformation of Chiral Polychlorinated Biphenyls (PCBs) in a Stream Food Web†

2010 ◽  
Vol 44 (8) ◽  
pp. 2836-2841 ◽  
Author(s):  
Viet D. Dang ◽  
David M. Walters ◽  
Cindy M. Lee
Keyword(s):  
Polychlorinated Biphenyls ◽  
Food Web ◽  
Chiral Polychlorinated Biphenyls

Phase I Enzyme Induction in Girardinichthys viviparus, an Endangered Goodeid Fish, Exposed to Water from Native Localities Enriched with Polychlorinated Biphenyls

2009 ◽  
Vol 57 (3) ◽  
pp. 561-570 ◽  
Author(s):  
Armando Vega-López ◽  
F. Alejandro Jiménez-Orozco ◽  
Luís A. Jiménez-Zamudio ◽  
Ethel García-Latorre ◽  
M. Lilia Domínguez-López
Keyword(s):  
Polychlorinated Biphenyls ◽  
Phase I ◽  
Enzyme Induction

scholarly journals Factors affecting the atmospheric occurrence and deposition of polychlorinated biphenyls in the Southern Ocean

2013 ◽  
Vol 13 (23) ◽  
pp. 12029-12041 ◽  
Author(s):  
C. J. Galbán-Malagón ◽  
S. Del Vento ◽  
A. Cabrerizo ◽  
J. Dachs
Keyword(s):  
Polychlorinated Biphenyls ◽  
Southern Ocean ◽  
Gas Phase ◽  
Long Range ◽  
Atmospheric Transport ◽  
Austral Summer ◽  
Deposition Flux ◽  
Atmospheric Concentration ◽  
Factors Affecting ◽  
Antarctic Soils

Abstract. Persistent organic pollutants, such as polychlorinated biphenyls, reach the Southern Ocean atmosphere through long-range atmospheric transport. In this study we report the largest dataset available for the atmospheric occurrence of PCBs in the Southern Ocean surrounding the Antarctic Peninsula from samples obtained during three cruises in 2005, 2008 and 2009. The gas phase concentrations of total PCBs (Σ25PCBs) ranged from 1 to 70 pg m−3, while the aerosol phase concentrations were significantly lower (0.04 to 0.4 pg m−3). The aerosol phase is enriched in the more hydrophobic congeners consistent with the model predictions of gas-particle partitioning. There is a net air-to-water diffusive flux of PCBs to the Southern Ocean, up to 100 times higher than the dry deposition flux of aerosol-bound PCBs. The air-water disequilibrium is higher for the more hydrophobic congeners consistent with the role of the biological pump removing PCBs from the water column by settling of PCBs bound to organic matter. The atmospheric half-lives of PCB 52 and 180 are of 3.8 and 1 days, respectively, as calculated from the measured atmospheric concentration and depositional fluxes. The volatilization of PCBs from Antarctic soils during the austral summer drives higher gas phase concentrations in the atmosphere over Antarctica during the warmer periods. This temperature dependence is not observed for PCBs over the adjacent Southern Ocean, probably due to the importance of long-range atmospheric transport and atmospheric deposition modulating the atmospheric occurrence of PCBs.

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