Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Steven R. Silva"'
Autor:
Steven R. Silva, Pius M. Ndegwa, Mike Vander Pol, S. Zaman, Larry Campbell, Alexander N. Hristov
Publikováno v:
Journal of Environmental Quality. 38:2438-2448
Ammonia is an important air and water pollutant, but the spatial variation in its concentrations presents technical difficulties in accurate determination of ammonia emissions from animal feeding operations. The objectives of this study were to inves
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a853d692313de0b4a80ab5f221a9ad09
https://doi.org/10.2134/jeq2009.0057
https://doi.org/10.2134/jeq2009.0057
Autor:
Clay Perschon, David L. Naftz, John Whitehead, Cory Angeroth, Bruce Waddell, Nathan Darnall, Terry Kenney, Steven R. Silva
Publikováno v:
Applied Geochemistry. 23:1731-1744
Despite the ecological and economic importance of Great Salt Lake (GSL), little is known about the input and biogeochemical cycling of nutrients and trace elements in the lake. In response to increasing public concern regarding anthropogenic inputs t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae3045717a09be2e37efc8e7304fd6f5
https://doi.org/10.1016/j.apgeochem.2008.03.002
https://doi.org/10.1016/j.apgeochem.2008.03.002
Autor:
Steven R. Silva, Randy A. Dahlgren, Carol Kendall, Charles R. Kratzer, Nobuhito Ohte, Daniel H. Doctor
Publikováno v:
Freshwater Biology. 52:2476-2493
Summary 1. To elucidate factors contributing to dissolved oxygen (DO) depletion in the Stockton Deep Water Ship Channel in the lower San Joaquin River, spatial and temporal changes in algae and nutrient concentrations were investigated in relation to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5b1815ed85067e0c887b55579594aa5
https://doi.org/10.1111/j.1365-2427.2007.01849.x
https://doi.org/10.1111/j.1365-2427.2007.01849.x
Autor:
Paige L. Herzon, Oscar J. Ferrians, Donald H. Richter, Thomas E. Smith, Steven R. Silva, Richard E. Zehner, Ian M. Lange, John N. Aleinikoff, Gerard C. Bond, Warren J. Nokleberg, R.T. Miyaoka, Carl E. Schwab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2257f2789226db5dbdba28cb13c23e74
https://doi.org/10.14509/29444
https://doi.org/10.14509/29444
Publikováno v:
Marine Chemistry. 98:148-155
The phosphate oxygen isotopic composition in naturally occurring particulate phosphatic compounds (y 18 Op) can be used as a tracer for phosphate sources and to evaluate the cycling of phosphorus (P) in the environment. However, phosphatic compounds
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e49a86156aeff9ea7d337b53421f6fc
https://doi.org/10.1016/j.marchem.2005.09.004
https://doi.org/10.1016/j.marchem.2005.09.004
Publikováno v:
Water, Air, and Soil Pollution. 165:13-35
To determine whether NO3− concentration pulses in surface water in early spring snowmelt discharge are due to atmospheric NO3−, we analyzed stream δ15N-NO3− and δ18O-NO3− values between February and June of 2001 and 2002 and compared them t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b0220d8066c3f1f2c6235842c616028
https://doi.org/10.1007/s11270-005-4641-8
https://doi.org/10.1007/s11270-005-4641-8
Publikováno v:
Limnology and Oceanography: Methods. 2:202-212
A method for preparation and analysis of the oxygen isotope composition (δ18O) of dissolved inorganic phosphate (DIP) has been developed and preliminary results for water samples from various locations are reported. Phosphate is extracted from seawa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a928d8183a0dc2090582279d18a294f
https://doi.org/10.4319/lom.2004.2.202
https://doi.org/10.4319/lom.2004.2.202
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 59:1874-1885
A study was conducted to determine whether NO3 stable isotopes (δ15N and δ18O), at natural abundance levels, could discriminate among NO3 sources from sites with different land uses at the basin scale. Water samples were collected from 24 sites
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6169032ac588f4d88a22109ba6d3f0be
https://doi.org/10.1139/f02-153
https://doi.org/10.1139/f02-153
Publikováno v:
Environmental Forensics. 3:125-130
Ground and surface waters in urban areas are susceptible to nitrate contamination from septic systems, leaking sewer lines, and fertilizer applications. Source identification is a primary step toward a successful remediation plan in affected areas. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4fa254c6c19348080b179bcd9471351
https://doi.org/10.1006/enfo.2002.0086
https://doi.org/10.1006/enfo.2002.0086
Publikováno v:
Rapid Communications in Mass Spectrometry. 16:854-858
Elemental analyzers have been successfully coupled to stable-isotope-ratio mass spectrometers for online measurements of the δ34S isotopic composition of plants, animals and soils. We found that the online technology for automated δ34S isotopic det
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d62fe05adf695da2ae65453f60502004
https://doi.org/10.1002/rcm.651
https://doi.org/10.1002/rcm.651