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261.
Concentrations of polybrominated diphenyl ethers, organochlorine compounds and nitro musks in mother's milk from Germany (Bavaria) 总被引:4,自引:0,他引:4
The aim of this study was to determine a new spectrum of substances that will be selected for future breast milk monitoring in Bavaria, Germany. Up to now, the analysis of breast milk in Bavaria was limited to selected organochlorine pesticides (OCP) and polychlorinated biphenyls (PCB). Information on background levels of toxicologically interesting substances, such as dioxins and dioxin-like polychlorinated biphenyls (dl-PCB) or on flame retardants, such as polybrominated diphenyl ethers (PBDE) are very limited or not available for Bavaria. We present here levels on OCP, some nitro musks, indicator PCB, polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF) and dl-PCB concentrations in breast milk collected at 12 weeks post-partum of 43 primiparous mothers living in Bavaria. The average concentrations of PCDD, PCDF and dl-PCB were 4.98, 4.93 and 9.92 pg WHO-TEQ g(-1) lipid, respectively. The mean contribution of PCDD, PCDF, non-ortho and mono-ortho PCB to the total WHO-TEQ is consistently about 25% each. Furthermore the concentration on PBDE in breast milk at two sampling points, 12 weeks and 16 weeks after delivery, were determined. Overall, 19 PBDE congeners were analysed, however the level of 12 PBDE congeners were below the limit of detection. BDE-153 and BDE-47 were the predominant congeners accounting for about 66% of the total PBDE. The means of the total concentrations of PBDE (five congeners) at the first and second sampling point were 1.90 and 2.03 ng g(-1) lipid, respectively. Based on our results the overall concentrations of the analysed substances in milk samples from Bavaria are consistent with the levels of breast milk samples of other European countries reflecting the low background body burden of these compounds. 相似文献
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Hermann J. Jordan 《Die Naturwissenschaften》1927,15(48-49):937-942
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Benthic epifauna in three areas of the northern North Sea was studied from 1999 to 2007 to investigate the effect of temperature
changes on community structure and species abundance and biomass. Abundance and/or biomass of 16 epifauna species was significantly
correlated with temperature anomalies of the mean sea surface temperature (SST) from 1971 to 2000. The response of species
to SST changes was different in the study areas depending on species life history and, most likely on food supply, which in
turn is strongly influenced by the timing and duration of primary production and regional hydrographical conditions (e.g.
stratification). Also, changes in community structure were obvious in the three areas between 2002 and 2003 coinciding with
high temperature anomalies and SST. On the other hand, these changes were mainly caused by the variability in abundance of
dominant species and altogether no clear trends in community structure were found. In contrast to epifauna communities in
the shallow southern North Sea temperature changes in the northern North Sea affected only single epifauna species until now. 相似文献
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