خيارات البحث
النتائج 1 - 10 من 78
Progestagens for human use. Exposure and hazard assessment for the aquatic environment
2009
Besse, J.P. | Garric, J. | Biologie des écosystèmes aquatiques (UR BELY) ; Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF)
[Departement_IRSTEA]Eaux [TR1_IRSTEA]BELCA | Little information is available on the environmental occurrence and ecotoxicological effects of pharmaceutical gestagens released in the aquatic environment. Since eighteen different gestagens were found to be used in France, preliminary exposure and hazard assessment were done. Predicted environmental concentrations (PECs) suggest that if parent gestagens are expected to be found in the ng l−1 range, some active metabolites could be present at higher concentrations, although limited data on metabolism and environmental fate limit the relevance of PECs. The biological effects are not expected to be restricted to progestagenic activity. Both anti-androgenic activity (mainly for cyproterone acetate, chlormadinone acetate and their metabolites) and estrogenic activity (mainly for reduced metabolites of levonorgestrel and norethisterone) should also occur. All these molecules are likely to have a cumulative effect among themselves or with other xenoestrogens. Studies on occurrence, toxicity and degradation time are therefore needed for several of these compounds.
اظهر المزيد [+] اقل [-]Reducing the impact of crop nutrients on the environment
1993
Steen, I. | Williams, T. (European Fertilizer Manufacturers Association, Brussels (Belgium))
Protective measures for water resources [water protection policies]
1991
Joerg, R. (Ministry of Interior of the State of Bavaria, Munich (Germany))
The environment and pollution
1993
McEldowney, S. | Hardman, D.J. | Waite, S.
Airborne trichloroacetic acid and its deposition in the catchment area of the Caspian sea
1999
Weissflog, L. | Manz, M. | Popp, P. | Elansky, N. | Arabov, A. | Putz, E. | Schuurmann, G. (UFZ-Centre for Environmental Research, Department of Chemical Ecotoxicology, PF 2, 04301 Leipzig (Germany))
Towards integrated national modelling with particular reference to the environmental effects of nutrients
1998
Alkemade, J.R.M. | Grinsven, J.J.M. van | Wiertz, J. | Kros, J. (National Institute of Public Health and the Environment, Bilthoven (Netherlands))
Environmental hazards of nitrogen loading in wetland rice fields
1998
Ghosh, B.C. | Ravi Bhat (Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur 721 302 (India))
Emission reduction scenarios for nitrogen compounds and their impact on acidification, eutrophication and ozone formation in Flanders
1998
Mensink, C. | Beirens, F. (VITO, Boeretang 200, B-2400 Mol (Belgium))
Application of nitrogen in production and post-production systems of agriculture and its effect on environment in India
1998
Shukla, B.D. | Misra, A.K. | Gupta, R.K. (Central Institute of Agricultural Engineering, Nabi Bagh, Berasia Road, Bhopal-462038 (India))
The environmental hazard caused by smelter slags from the Sta. Maria de la Paz mining district in Mexico
1997
Manz, M. | Castro, L.J. (UFZ Centre for Environmental Research Leipzig-Halle, Department of Chemical Ecotoxicology, PO Box 2, D-04301 Leipzig (Germany))
