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Showing 1 to 20 of 97 for “"Polychlorinated Biphenyls"”.
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Thyrotoxic and dopaminergic effects of polychlorinated biphenyls
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:50:44Z Item is restricted indefinitely.
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Environmental biotransformation of chiral polychlorinated biphenyls and their metabolites
… mechanisms of atropisomer enrichment for chiral polychlorinated biphenyls (PCBs) and their metabolites in organisms. Stereoselective biotransformation and bioaccumulation were identified as two major reasons for the different environmental fate of PCB atropisomers. Other affecting factors, such …
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Mass balance modeling of polychlorinated biphenyls in the Lower Duwamish Waterway
… in Seattle, Washington is contaminated with polychlorinated biphenyls (PCBs). A zero dimensional mass balance of the 5 mile long waterway, which ends in Elliott Bay, helps to determine the different sources and concentrations of PCBs within the Lower Duwamish Waterway to aid future remedial …
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Disposition and Toxic Effects of Polychlorinated Biphenyls Following Different Routes of Exposure
The differences in disposition and toxic effects of PCBs caused by different exposure routes were demonstrated. Therefore, to better estimate human health effects following exposure to PCBs, it is crucial to identify PCB congener profiles in the exposure sources.
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Sediment Dynamics and Associations with Polychlorinated Biphenyls and Dioxins in an Urban Estuary
Polychlorinated biphenyls (PCBs) and dibenzo-p-dioxins and dibenzofurans (PCDD/Fs, or “dioxins”) in the sediments of aquatic systems is a persistent global problem that poses serious health risks. This dissertation focuses on understanding the occurrence of PCBs and dioxins in the sediments of the …
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Modeling The Impact Of Sediment Resuspension And Flocculation On The Fate Of Polychlorinated Biphenyls
… include polycyclic aromatic hydrocarbon (PAH), polychlorinated biphenyls (PCBs), and polybrominated diphenyl ethers (PBDEs). Sorption to resuspended particles and sediments plays an important role controlling the water column residence times and spatial distributions of HOC in aquatic …
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The Biological Implications of The Polychlorinated Biphenyls in The Housefly and Model Aquatic Ecosystem
Made available in DSpace on 2014-12-11T18:05:43Z (GMT). No. of bitstreams: 1 7405654.pdf: 3329281 bytes, checksum: b4b2950656544b055b91aaf9d292ff5c (MD5) Previous issue date: 1973
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Supercritical fluid extraction of polychlorinated biphenyls and organochlorine pesticides from mussel tissue (Mytilus edulis)
… fluid extraction (SFE) of twenty one polychlorinated biphenyls (PCBs) and eight organochlorine pesticides (OCPs) from freeze dried mussel tissue is discussed, demonstrated, and compared to traditional Soxhlet extractions. The aim of this study was to determine the efficacy of SFE for …
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Development of a dye sensitized photochemical reduction process for the degradation of polychlorinated biphenyls
A method has been developed that can photoreduce polychlorinated biphenyl (PCB) to biphenyl with great speed and efficiency as well as at relatively low cost. This process uses visible light, generated by ordinary incandescent light bulbs, which is absorbed by a common dye sensitizer. The dye …
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The effect of protozoan grazers on the cycling of polychlorinated biphenyls (PCBs) in marine systems
… the speciation of organic contaminants such as polychlorinated biphenyls (PCBs) and ultimately determine their residence time in a particular environment. In marine systems, the microbial loop influences organic carbon dynamics by recycling a significant fraction of dissolved and particulate …
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Characterization of BphD, a C-C bond hydrolase involved in the degradation of polychlorinated biphenyls
… to understand a block in the degradation of polychlorinated biphenyls. BphDLB400 preferentially hydrolyzed 3-substituted HOPDAs in the order H > F > Cl > Me, indicating that steric bulk impairs catalysis. Kinetic analyses further indicated that large 3-substituents impede formation of the …
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The effect of protozoan grazers on the cycling of polychlorinated biphenyls (PCBs) in marine systems
… the speciation of organic contaminants such as polychlorinated biphenyls (PCBs) and ultimately determine their residence time in a particular environment. In marine systems, the microbial loop influences organic carbon dynamics by recycling a significant fraction of dissolved and particulate …
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Development of analytical techniques for detection and remediation of polychlorinated biphenyls in soil and water samples
In this study, GC-MS methods were developed for identifying and quantifying nineteenand five pre-selected PCB congeners in solution. The developed methods wererepeatable (≤ 4.9 %) and reproducible (≤ 7.7 %) with detection limits of1.25 - 15 ng µL-1. The extraction of PCBs from soil and water …
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A new method for the routine trace analysis of polychlorinated biphenyls in waste oil and contaminated soil
Polychlorinated biphenyls (PCBs) were used in various industries and equipment such as transformers, paints and capacitors until 1979. PCBs enter the environment through improper disposal by users and manufacturers. The Stockholm Convention on persistent organic pollutants of which South Africa is …
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Investigations into the determination of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) by capillary gas chromatography
Factors involved in the determination of PAHs (16 priority PAHs as an example) and PCBs (10 PCB congeners, representing 10 isomeric groups) by capillary gas chromatography coupled with mass spectrometry (GC/MS, for PAHs) and electron capture detection (GC/ECD , for PCBs) were studied, with emphasis …
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Using polyethylene passive sampling to assess transport of polychlorinated biphenyls (PCBs) between contaminated sediments, water, and biota
Polychlorinated biphenyls (PCBs), which were a widely used group of chemicals before their manufacture was banned in 1979 in the United States, still contaminate numerous aquatic systems. Although there are ongoing efforts to remediate these sites, our ability to implement effective remediation …
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Effects of polychlorinated biphenyls (PCBs) on hepatic enzyme induction, uterotropic responses, and thyroid hormone levels in prepubertal female rats
… rats, was developed to study effects of polychlorinated biphenyls (PCBs) on hepatic enzyme induction, uterotropic responses, and thyroid hormone levels. Three approaches have been used to study the multiple effects of PCB mixtures: (1) environmental mixtures (soil, dust and air samples) …
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