Prenatal exposures to organophosphate pesticides and polychlorinated biphenyls have been associated with abnormal neonatal behavior and/or primitive reflexes. In 1998-2002, the Mount Sinai Children's Environmental Health Center (New York City) investigated the effects of indoor pesticide use and exposure to polychlorinated biphenyls on pregnancy outcome and child neurodevelopment in an inner-ci...

Polychlorinated biphenyls (PCBs) are a group of chemicals that contain 209 individual compounds (known as congeners) with varying harmful effects. Information on specific congener toxicity is very limited. Most toxicity testing has been done on specific commercial mixtures; however, PCB mixtures found in the environment will differ in composition from the commercial mixtures because of partitio...

Exposure of isolated hepatocytes to a polychlorinated biphenyl mixture induced a rapid loss of cell viability. The effect was not dose-dependent. The biochemical effects in the cellular toxicity did not involve glutathione content, protein sulfhydryl groups and lipid peroxidation. A transient increase in cytosolic Ca2+ was observed after exposing the hepatocytes to the polychlorinated biphenyl ...

• Transformers and capacitors • Other electrical equipment including voltage regulators, switches, reclosers, bushings, and electromagnets • Oil used in motors and hydraulic systems • Old electrical devices or appliances containing PCB capacitors • Fluorescent light ballasts • Cable insulation • Thermal insulation material including fiberglass, felt, foam, and cork • Adhesives and tapes • Oilba...

nical mixtures found in the formulation and the measurements made on the basis of calibration with these mixtures. Chlorobiphenyl (CB) refers to the individual congener named by the Ballschmiter number. TEQs refer to the sum of the concentration of the congener equivalent to 2, 3, 7, 8 TCDD obtained by using the toxic equivalence factor for each PCB. POLYCHLORINATED BIPHENYLS: GAS CHROMATOGRAPHY

rd HJ. Reverse dosimetry: interpreting trihalomethanes biomonitoring data using physiologically based pharmacokinetic modeling. Use of a physiologically based pharmacokinetic model to identify exposures consistent with human biomonitoring data for chloroform. et al. Bladder cancer and exposure to water disinfection by-products through ingestion, bathing, showering, and swimming in pools. AD. Th...

Depending on the degree of chlorination of the PCBs, their physico-chemical properties, like inflammability or electric conductivity, brought about a wide field of application. Thus, PCBs have been used as electric fluids in transformers and capacitors, as pesticide extenders, adhesives, dedusting agents, cutting oils, flame retardants, heat transfer fluids, hydraulic lubricants, sealants, pain...

Polychlorinated biphenyls, synthetic hydrocarbon compounds once used as hydraulic fluids and lubricants in electrical transformers and capacitors, are among the most ubiquitous and persistent environmental contaminants. Although banned in most Western nations since the 1970s, substantial residues of these compounds persist in air, water, soil, and sediment world wide (Swain, ’83) and can be det...

The elution order of 209 polychlorinated biphenyls (PCBs) was determined using five types commercially available capillary columns (VF-Xms, Rtx-20, VF-35ms, VF-1301ms and VF-200ms). In addition, the interference among molecular ion peaks PCDDs non-dioxin like PCB congeners, which affect during dioxin analysis by GC/MS, clarified.

An anaerobic culture capable of dechlorinating polychlorinated biphenyls was subcultured under strict anaerobic conditions on solid media containing sterilized river sediment. The dechlorination activity was transferred as a bacterial colony on a solid medium three times. After two transfers on solid medium, the culture was no longer methanogenic but still dechlorinated a mixture of tri- and te...