The concentrations of polychlorinated biphenyls (PCBs) were determined from Autumn season 2019 to summer 2020 at six sites they are: ( Al-Qurna, Al-Deer, Al-Qarma, Al-Ashar, Abu-Al-khasib, Al-Fao )  in Shatt Al-Arab river, Basrah city, south Iraq. water samples taken each site and analyzed using gas chromatography-mass spectrometry (GC–MASS) type Agilent 7890A for PCBs levels. results indi...

The aim of this work is to give representative data on polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyl (PCBs) from stack gas emissions of an urban solid waste management plant which has to comply with the limit of 0.1 ng I-TEQ/Nm3. In particular, the study is focused on 29 target compounds, the seventeen 2,3,7,8-PCDDs/Fs, four non-ort...

Introduction Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) are ubiquitous, persistent, lipophilic pollutants in food. Ingestion of contaminated food is the principal way of human exposure to these compounds, Most data about human exposure to PCDD/Fs and dioxin-like PCBs were available from the industrialized countries 2 while the data from de...

We investigated the effect of PCB-77, -126 or -153 (10 or 100 ng/ml) on free intracellular calcium concentrations([Ca2+]i) in bovine myometrial cells from days 1-5 of the estrous cycle. Cells were incubated with or without PCBs for 48 h (38 degrees C, aerated atmosphere) and thereafter [Ca2+]i was measured by means of fluorescent calcium indicator Fura-2. PCBs increased basal concentrations of ...

A large and growing body of literature is available on the neurotoxicity of methylmercury and PCBs as expressed in the behavior of both humans and laboratory animals. Methylmercury and PCBs will be compared with PCBs with attention directed at overlaps and distinctions in their profiles of neurotoxicity. It is possible with methylmercury and, to a lesser extent, with PCBs to characterize the se...

PCBs have been used in industry in Sweden since 1929, initially only in electric transformers and capacitors, later also in paints, lacquers etc. The importation of PCBs to Sweden in 1970 was close to 500 tons. Approximately half of this amount was exported to other countries in electric capacitors. The use of PCBs in dyes was 65 tons in 1968 but was voluntarily diminished by industry to 35 ton...

The present study determined the residue levels and characteristic patterns of polychlorinated biphenyls (PCBs), hydroxylated PCBs (OH-PCBs), polybrominated diphenyl ethers (PBDEs), hydroxylated PBDEs (OH-PBDEs), methoxylated PBDEs (MeO-PBDEs) and bromophenols (BPhs) in the blood of pinnipeds collected in 1990–1999 from Japanese coastal waters. Except in ribbon seal, PCBs and OH-PCBs were detec...

There is concern that exposures to the environmental chemicals polychlorinated biphenyls (PCBs) may contribute to breast cancer risk. An individual's susceptibility to the effects of PCBs may be partially determined by polymorphisms in the gene encoding the biotransformation enzyme cytochrome P450 1A1 (CYP1A1). PCB exposure induces CYP1A1 activity, and PCBs themselves or other xenobiotics can b...

Organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were measured by a gas chromatography-mass spectometry (GC-MS) in some edible fish from Huairou Reservoir and Gaobeidian Lake in Beijing, China. The concentrations of OCPs and PCBs were higher in fish (except Misgurnus anguillicaudatus) from Gaobeidian Lake than in those from Huairou Reservoir. The average concentrations of H...

Polychlorinated biphenyls (PCBs) contamination in tropical and sub-tropical areas and the associated risks have attracted great concern. A total of 69 samples representing five distinct land types were collected to assess PCB concentrations in the Pearl River Delta (PRD), South China, including spatial distributions in soils of the area, the probable anthropogenic sources, and related potential...