... Toxic equivalency factor (TEF) approaches have been used to evaluate the reproductive hazards of polychlorinated biphenyls (PCBs) to wildlife. These approaches are based primarily on the relative potency of individual PCB congeners for 2,3,7,8-tetrachlorodibenzo- p -dioxin-like induction...

... Polychlorinated biphenyls (PCBs) have been widely utilized industrially, resulting in persistent human exposure. To investigate the long-term biochemical effects of bioretained PCB congeners, mice were injected once with Aroclor 1254 (100 or 500 mg/kg) and sacrificed at intervals from 48 hrs...

... of the sample compound. Performance of the HPLC-EC method is illustrated through the analysis of central ganglia from the marine mollusc, Aplysia californica , that have been exposed to polychlorinated biphenyls (PCBs). Aplysia were injected with an Aroclor mixture (Aroclors 1016, 1221, 1254 & 1260 1:1:1...

.... The effect of varying sediment composition, measured as the percent of combustible solids (CS), percent of OC, and percent of fine-grained material (FM) (the <63 μm fraction of the sediment), was examined by determining the accumulation of sediment-associated polychlorinated biphenyl and polycyclic...

... used to assess the potential toxicity of field-collected contaminated sediment from two sites in Waukegan Harbor, Illinois, an inlet of Lake Michigan contaminated with polychlorinated biphenyls (PCBs), polycyclic aromatic compounds (PACs), and metals; and a single site at Homer Lake, a small...

... A procedure has been developed to identify and measure members of three classes of chlorinated compounds by level of chlorination. These classes are polychlorinated biphenyls, chlorinated dibenzo- p -dioxins, and chlorinated dibenzofurans. A gas chromatograph (GC) equipped with a capillary...

... Fate analysis predictions of agricultural or industrial source toxicants in aquatic or marine environments can be affected by the presence or absence of adapted (preexposed) microbial populations and amenable substrates for cometabolic or cooxidative biotransformation. Polychlorinated biphenyls...

... inorganic and organic constituents of marine samples. Among the samples prepared to date are a set of two sediment reference materials for the determination of trace elements and inorganic constituents and a set of three sediment reference materials for the determination of polychlorinated biphenyls (PCB...

... material and biologically available. waste characterization sediment characterization bioaccumulation bioavailability gas chromatography/mass spectrometry qualitative analysis polynuclear aromatic hydrocarbons polychlorinated biphenyls Ethylan gas chromatography marine Mytilus edulus...

... of magnitude higher in organisms living in the vicinity of the midshelf site than those living offshelf. Predicted tissue residues were compared with the Food and Drug Administration (FDA) tolerance level for polychlorinated biphenyls (PCBs) and the action level for chlordane to determine potential impacts...

... contamination by chemicals such as polychlorinated biphenyls, chlorinated pesticides, trace metals, and plutonium has been assessed in several bivalve sentinel organism programs. Advantages and limitations of this approach are presented and discussed briefly within the context of both national and international...

...) as inorganic chloride [approximately 6.5 ppm polychlorinated biphenyls (PCBs)]. The analysis can be performed within 20 min and can be used to screen hazardous waste samples for PCBs at the 50-ppm enforcement limit of the Toxic Substances Control Act. total organic halogens (TOX) combustion bomb ion...

... organochlorine pesticides polychlorinated biphenyls data analysis analysis of variance aquatic toxicology hazard assessment C. J. Schmitt^ Analysis of Variance as a IVIethod for Exannining Contaminant Residues in Fish: National Pesticide Monitoring Program REFERENCE: Schmitt, C. J., "Analysis of Variance...

... evaluated. Several solid sorbents in combination with PUF were evaluated, using mixtures of either organochlorine or organophosphorus pesticides. Recoveries of these pesticides are discussed. An evaluation of the system during a cleanup of a polychlorinated biphenyl (PCB) spill in North Carolina...

... and continuous procedure. Alkali metal hydroxide treated silica gel effectively separated phenols and acids from neutral compounds. multiclass organic environmental contiminants phenols pesticides polychlorinated biphenyls chlorinated dibenzo- p -dioxins dibenzofurans comprehensive cleanup analysis...

... The distribution of polychlorinated biphenyl (PCB) compounds in Puget Sound is discussed in terms of the physical and chemical processes that influence their flow throughout the estuary. These data were used to examine the accumulation of PCBs in suspended phases and in lower trophic level biota...