خيارات البحث
النتائج 271 - 280 من 347
Assessment of the exposure and loads of acidifying and eutrophying pollutants and ozone, as well as their, harmful influence on the vitality of the trees and the Speulder forest ecosystem as a whole
1998
Erisman, J.W. (Rijksinstituut voor Volksgezondheid en Milieuhygiene, Bilthoven (Netherlands).) | Draaijers, G.P.J. | Steingrover, E. | Dijk, H. van | Boxman, A. | Vries, W. de
Antiestrogenic activity of anthropogenic and natural chemicals النص الكامل
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.
اظهر المزيد [+] اقل [-]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.
Effects of alum-treated waste water sludge on barley growth
1998
Wang, F.H. (Quebec Univ., Ste-Foy, Que. (Canada). Inst. National de la Recherche Scientifique) | Couillard, D. | Auclair, J.C. | Campbell, P.G.C.
Lead (Pb) in Arctic char (Salvelinus alpinus) from oligotrophic alpine lakes: Gills versus digestive tract
1998
Kock, G. (Innsbruck Univ. (Austria). Inst. of Zoology and Limnology) | Triendl, M. | Hofer, R.
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.)
Effect of organic materials on partitioning, extractability and plant uptake of metals in an alum shale soil
1998
Narwal, R.P. (Agricultural Univ. of Norway, Aas (Norway). Dept. of Soil and Water Sciences) | Singh, B.R.
The effects of acid precipitation and ozone on the ectomycorrhizae of red spruce saplings
1998
Roth, D.R. (Cornell Univ., Ithaca, NY (USA). Dept. of Natural Resources) | Fahey, T.J.
Quality of water wells in an agricultural area in the city of La Plata, Argentina
1998
Marteau, S.A. (Universidad Technologica Nacional, La Plata, Buenos Aires (Argentina). Dept. of Science and Technology) | Alberino, J.C. | Ripoli, J.L. | Rosato, M.E.
Wastewater irrigation effect on soil, crop and environment: a pilot scale study at Irbid, Jordan
1998
Shahalam, A. (Ohio State Univ., Coshocton, OH (USA). Outlying Station) | Abu-Zahra, B.M. | Jaradat, A.
