objective: to determine the levels of polychlorinated biphenyls (pcbs) and polybrominateddiphenyl ethers (pbdes) as persistent organic pollutants (pops) in serum of primiparous women at the third trimester of pregnancy and identify the main determinants of pops levels such as socio-demographic, lifestyle, and diet in tehran. materials and methods: one- hundred eighty five serum samples from two...

Polychlorinated biphenyls (PCBs) are industrial compounds with multiple industrial and commercial uses (Table 41.1). PCBs are chemically inert and stable when heated. These properties contribute greatly to PCBs having become environmental contaminants. The chemical inertness and heat stability properties that make PCBs desirable for industry also protect them from destruction when the products ...

during the croatian homeland war in 1991, the capacitor batteries of the zadar electric powersubstation (ts 110/35 kv) were damaged, resulting in the severe pollution of the soil with polychlorinatedbiphenyls (pcbs). due to porosity of karstic soil pcbs represent great environmental and human health risksthat need some action. the polluted soil was collected and an experimental field was formed...

Detection of trace levels of persistent pollutants in the environment is difficult but significant. Organic pollutant homologues, due to their similar physical and chemical properties, are even more difficult to distinguish, especially in trace amounts. We report here a simple method to detect polychlorinated biphenyls (PCBs) in soil and distilled spirit samples by the surface-enhanced Raman sc...

Aqueous solubilities of polychlorinated biphenyls have been correlated with topologicalmolecular descriptors which are functions of local and global invariants of labeled hydrogenfilled graphs. Morgan extended connectivity and nearest neighboring codes have been usedas local graph invariants. The number of chlorine atoms in biphenyls has been employedas a global graph invariant....

OBJECTIVE Exposure to environmental organochlorines has been examined as a potential risk factor for human breast cancer with mixed results. Our purpose was to examine associations between organochlorines and the development of breast cancer in a large prospective study using stored adipose tissue. METHODS We conducted a nested case-control study of 409 postmenopausal women who developed brea...

We investigated combustion in a small home waste incinerator and analyzed both flue gas and residual ash for formation of the dioxin-related compounds polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and coplanar polychlorinated biphenyls and their precursors polychlorinated benzenes, polychlorinated phenols, polychlorinated diphenyl ethers, and polychlorinated biphenyls. Parti...