Zobrazeno 1 - 10
of 22
pro vyhledávání: '"N. R. Urban"'
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 58:1347-1355
Lake sediments often are regarded as accurate records of changes in climatic conditions, rates of atmospheric deposition of substances to the lake, or other processes occurring within lakes. In this study, the sedimentary record of sulfur was examine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b323ae76340a33fd6e06931fae108760
https://doi.org/10.1139/f01-085
https://doi.org/10.1139/f01-085
Publikováno v:
Water, Air, & Soil Pollution. 79:201-224
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18cfd3fae3923f729d1ffc80238b0c2a
https://doi.org/10.1007/bf01100438
https://doi.org/10.1007/bf01100438
Publikováno v:
Limnology and Oceanography. 39:797-815
Rates of sulfate diffusion and reduction were measured in sediments of Little Rock Lake, an oligotrophic, soft-water lake in northern Wisconsin. Laboratory measurements of kinetics of sulfate reduction found half-saturation constants (20-30 pmol lite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::759b5c099a78c9164fe2bb6a1eaa2a1d
https://doi.org/10.4319/lo.1994.39.4.0797
https://doi.org/10.4319/lo.1994.39.4.0797
Autor:
N. R. Urban, P. L. Brezonik
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 50:1946-1960
Laboratory microcosms were used to investigate rates of S movement into and out of sediments and factors affecting its net retention and speciation. Rates of sulfate reduction, calculated from movement of 35S into and out of the sediments, were much
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::808664e647446e41e1d23de068177c85
https://doi.org/10.1139/f93-217
https://doi.org/10.1139/f93-217
Publikováno v:
Geochimica et Cosmochimica Acta. 54:3329-3346
Peatlands long have been considered to preserve the record of atmospheric deposition of anthropogenic contaminants such as Pb. In the past two decades, {sup 210}Pb has been widely used to data recent strata of peat and to calculate accumulation rates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90d986f392ba95c4344f058239a8dbd4
https://doi.org/10.1016/0016-7037(90)90288-v
https://doi.org/10.1016/0016-7037(90)90288-v
Publikováno v:
Limnology and Oceanography. 35:1516-1534
Concentrations of Al, Fe, Mn, major ions, and dissolved organic C (DOC) were measured in 37 lakes in Halifax County, Nova Scotia, to determine the factors controlling the behavior of these metals in acidic waters with relatively high concentrations o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::657079560d3d2f2924c1864fbff45e73
https://doi.org/10.4319/lo.1990.35.7.1516
https://doi.org/10.4319/lo.1990.35.7.1516
Autor:
N. R. Urban
Publikováno v:
Advances in Chemistry ISBN: 9780841225268
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5058c45bab2fa619583e9beb3e13d162
https://doi.org/10.1021/ba-1994-0237.ch010
https://doi.org/10.1021/ba-1994-0237.ch010
Publikováno v:
Biogeochemistry. 9
The chemical speciation of aluminum was examined in surface water samples from Sphagnum peatlands in north-central Minnesota, from peatlands along the Canadian east coast, and from bogs in the Pennine Mountain area of England. In highly organic ([DOC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::563846e6a90f7a2ce8f476ef093b3fe9
https://doi.org/10.1007/bf00000601
https://doi.org/10.1007/bf00000601
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 44:1165-1172
Aluminum, iron, zinc, and lead were measured in 37 surface waters from 24 bogs along an east to west transect from Manitoba and Minnesota to Maine and the Atlantic Provinces of Canada. The major influence upon Al and Fe is atmospheric deposition of s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2136578d18861d3d5cefa9579f3438ed
https://doi.org/10.1139/f87-139
https://doi.org/10.1139/f87-139
Autor:
S. J. Eisenreich, N. R. Urban
Publikováno v:
Canadian Journal of Botany. 66:435-449
The nitrogen cycle of a small, forested, Sphagnum peatland in northern Minnesota was studied for 4 years. Hydrologic inputs and outputs (atmospheric deposition, upland runoff, streamflow) were monitored for4 years, and annual uptake of N by vegetatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a88d6a947763545ba82b7a877e435e3
https://doi.org/10.1139/b88-069
https://doi.org/10.1139/b88-069