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Résultats 281-290 de 347
Modelling acidification effects on coniferous forest soils
1998
Eriksson, E. (Uppsala Univ. (Sweden). Dept. of Geosciences)
Inhibition of chlorophyll synthesis and enzymes of nitrogen assimilation by selenite in excised maize leaf segments during greening
1998
Jain, M. (Devi Ahilya Univ., Indore (India). School of Biochemistry) | Gadre, R.P.
Antiestrogenic activity of anthropogenic and natural chemicals Texte intégral
1998
Navas, José María | Segner, H. (Helmut)
A number of natural and man-made chemicals possess antiestrogenic activity, i.e. they antagonize a broad spectrum of estrogen-induced responses in vertebrates. Examples of antiestrogens include dioxin, furan and PCB congeners, certain PAHs, pesticides and indol-3-carbinol derivatives. Major mechanisms of antiestrogenicity are antagonistic action of chemicals at the estrogen receptor, or binding of chemicals to the arylhydrocarbon (Ah) receptor and subsequent interaction with estrogen-responsive genes. Toxicological consequences resulting from antiestrogenic activity have not been conclusively demonstrated to date, although antiestrogenic compounds could critically affect sensitive reproductive and developmental processes.
Afficher plus [+] Moins [-]Organochlorine contamination in selected estuarine and coastal marine finfish and shellfish of New Jersey
1998
Kennish, M.J. (Rutgers Univ., New Brunswick, NJ (USA). Inst. of Marine and Coastal Sciences) | Ruppel, B.E.
The environmental consequences of the conservation tillage adoption decision in agriculture in the United States
1998
Uri, N.D. (Economic Research Service USDA, Washington, DC (USA). Natural Resources and Environment Div.)
Absorption of heavy metals in wild berries and edible mushrooms in an area affected by smelter emissions
1998
Barcan, V.S. (Lapland Biospheric Reserve Zeleny, Monchegorsk (Russian Federation)) | Kovnatsky, E.F. | Smetannikova, M.S.
Effects of simulated acid rain on Pinus densiflora: inhibition of net photosynthesis by the pheophytization of chlorophyll
1998
Shan, Y. (Chinese Academy of Sciences, Beijing (China). Research Center for Eco-Environmental Sciences)
Element concentrations in Scots pine needles on radial transects across a subarctic area
1998
Rautio, P. (Oulu Univ. (Finland). Dept. of Biology) | Huttunen, S. | Lamppu, J.
Above-ground sulfur cycling in adjacent coniferous and deciduous forests and watershed sulfur retention in the Georgia Piedmont, U.S.A.
1998
Cappellato, R. (Emory Univ., Atlanta, GA (USA). Human and Natural Ecology Program) | Peters, N.E. | Meyers, T.P.
Toxic and sublethal effects of ammonium chloride on a freshwater fish Oreochromis mossambicus
1998
Rani, E.F. (Madras Univ., Madras, Tamil Nadu (India). Dept. of Pharmacology and Environmental Toxicology) | Elumalai, M. | Balasubramanian, M.P.
