Jörg Oehlmann

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..Adverse effects after the ozone reactor are possibly a result of the formation of toxic oxidation byproducts. Biologically active sand filtration obviously is an effective barrier to such compounds...

..The results emphasize that prosobranchs are affected by BPA at lower concentrations than are other wildlife groups, and the findings also highlight the importance of exposure conditions...

..However, the fact that chemical-induced reduced genetic diversity, which is not necessarily linked to genetic adaptation, leads to a reduced fitness under altered stress conditions, is to our knowledge a novel finding...

..We found severe effects for GEN-, indicating that populations with lower genetic diversity are more endangered by combined stressors such as increasing temperature and chemical pollution compared to genetically diverse populations...

..The current approach critically reviews the exposure and especially the effect analyses in the reports or drafts, considering also potential endocrine effects of the plasticizers...

..Furthermore, the hazard of plasticizers has been investigated in annelids, molluscs and arthropods only, and given the sensitivity of some invertebrates, effects assessments are warranted in other invertebrate phyla...

..Therefore, the results provide evidence for the involvement of the RXR and the androgen signalling pathway. Further investigations are necessary to resolve the biochemical mechanism of imposex development...

..Finally, the ecological relevance of EDC effects on the population and community level and the application of prosobranchs for the assessment of EDCs are addressed...

..Additional observations of the brood stock showed seasonal fluctuations in reproduction under constant laboratory conditions. The recommended temperature range and test conditions have to be further investigated...

..While the dietary exposure to estrogenic activity is lower than previously estimated, our results demonstrate that many food types are a source of unidentified estrogen-like compounds still awaiting toxicological evaluation...

..The results indicate that in any case ozonation should not be applied without subsequent post treatment appropriate for oxidation byproducts removal (e.g. sand filtration)...

..The study also provides strong evidence for the acquirement of a higher tolerance towards the stressor in the TBT-exposed group...

..antipodarum for a standardized procedure, and this reproduction test will be introduced into the OECD guideline program for standardization in the near future...

..However, due to the limited extractability, polar ozonation by-products were neglected for toxicity analysis, and hence non-specific toxicity after O(3) is underestimated...

..The current study aimed on an ecotoxicological characterization of 1H-benzotriazole (1H-BT) and 5-methyl-1H-benzotriazole (5MBT)...

..In some sediment tests elevated ammonia concentrations occurred in the overlying water so that an influence of these partially toxic concentrations on the test results cannot be ruled out...

..The aim of this study was to assess the integrated estrogenic burden of bottled mineral water as model foodstuff and to characterize the potential sources of the estrogenic contamination...

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..However,for carbaryl, methomyl, and procymidone, ARfDs were exceeded substantially for intake of grapefruit and bell peppers. As a result, the EU withdrew the methomyl authorization in 2008 and revised procymidone guideline values...

..Furthermore, the findings presented here conform to previous studies and indicate that the contamination of bottled water with endocrine disruptors is a transnational phenomenon...

..The present study confirms the strong effect of high inbreeding rates on developmental deformities in chironomids...

..Further, 4 weeks of acclimatization are necessary after density stress. An additional 12 weeks density experiment showed that medium volume in each replicate can be decreased by half to save on chemicals, water and space during tests...

..For Cd a clear prolonged average main emergence interval was observed, but not for TBT. TBT and Cd inhibited also oviposition. These effects resulted in a concentration-depended reduction of the population growth rate...

..Rapid dissipation of these substances from the water phase was observed indicating the need for more frequent test medium renewal in chronic tests or the use of flow-through test systems...

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