Search Results - "Schaeffer, S. M."

A theoretical analysis of microbial eco-physiological and diffusion limitations to carbon cycling in drying soils by Manzoni, S., Schaeffer, S.M., Katul, G., Porporato, A., Schimel, J.P.

“…Soil microbes face highly variable moisture conditions that force them to develop adaptations to tolerate or avoid drought. Drought conditions also limit the…”
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Substrate quality alters the microbial mineralization of added substrate and soil organic carbon by Jagadamma, S, Mayes, M. A, Steinweg, J. M, Schaeffer, S. M

“…The rate and extent of decomposition of soil organic carbon (SOC) is dependent, among other factors, on substrate chemistry and microbial dynamics. Our…”
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Habitat and Vegetation Variables Are Not Enough When Predicting Tick Populations in the Southeastern United States by Trout Fryxell, R T, Moore, J E, Collins, M D, Kwon, Y, Jean-Philippe, S R, Schaeffer, S M, Odoi, A, Kennedy, M, Houston, A E

“…Two tick-borne diseases with expanding case and vector distributions are ehrlichiosis (transmitted by Amblyomma americanum) and rickettiosis (transmitted by A…”
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Biological and physical influences on the carbon isotope content of CO₂ in a subalpine forest snowpack, Niwot Ridge, Colorado by Bowling, D. R, Massman, W. J, Schaeffer, S. M, Burns, S. P, Monson, R. K, Williams, M. W

“…Considerable research has recently been devoted to understanding biogeochemical processes under winter snow cover, leading to enhanced appreciation of the…”
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DNA hypomethylation in 5-azacytidine-induced early-flowering lines of flax by Fieldes, M.A, Schaeffer, S.M, Krech, M.J, Brown, J.C.L

“…HPLC analysis was used to examine the cytosine methylation of total DNA extracted from four early-flowering lines that were induced by treating germinating…”
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Alterations of Nitrogen Dynamics under Elevated Carbon Dioxide in an Intact Mojave Desert Ecosystem: Evidence from Nitrogen-15 Natural Abundance by S. A. Billings, S. M. Schaeffer, S. Zitzer, T. Charlet, Smith, S. D., Evans, R. D.

“…We examined soil and vegetation N isotopic composition (δ15N) and soil inorganic N availability in an intact Mojave desert ecosystem to evaluate potential…”
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Elevated stream inorganic nitrogen impacts on a dominant riparian tree species: Results from an experimental riparian stream system by Hultine, K. R., Jackson, T. L., Burtch, K. G., Schaeffer, S. M., Ehleringer, J. R.

“…The release of inorganic nitrogen from intensive agricultural practices and urbanization has resulted in significant alterations of the aquatic nitrogen cycle…”
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Assessment of cryogenic pretreatment for simulating environmental weathering in the formation of surrogate micro- and nanoplastics from agricultural mulch film by Astner, A.F., Hayes, D.G., O'Neill, H., Evans, B.R., Pingali, S.V., Urban, V.S., Schaeffer, S.M., Young, T.M.

“…Microplastics (MPs) and nanoplastics (NPs) from mulch films and other plastic materials employed in vegetable and small fruit production pose a major threat to…”
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Responses of Soil Nitrogen Dynamics in a Mojave Desert Ecosystem to Manipulations in Soil Carbon and Nitrogen Availability by S. M. Schaeffer, S. A. Billings, Evans, R. D.

“…We investigated the effects of changes in soil C and N availability on N mineralization, nitrification, denitrification, NH₃ volatilization, and soil…”
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Trace N gas losses and N mineralization in Mojave desert soils exposed to elevated CO2 by BILLINGS, S. A, SCHAEFFER, S. M, EVANS, R. D

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Nitrogen fixation by biological soil crusts and heterotrophic bacteria in an intact Mojave Desert ecosystem with elevated CO2 and added soil carbon by BILLINGS, S. A, SCHAEFFER, S. M, EVANS, R. D

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Responses of soil nitrogen dynamics in a Mojave Desert ecosystem to manipulations in soil carbon and nitrogen availability by SCHAEFFER, S. M, BILLINGS, S. A, EVANS, R. D

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Soil water availability and microsite mediate fungal and bacterial phospholipid fatty acid biomarker abundances in Mojave Desert soils exposed to elevated atmospheric CO2 by Jin, V.L, Schaeffer, S.M, Ziegler, S.E, Evans, R.D

“…Changes in the rates of nitrogen (N) cycling, microbial carbon (C) substrate use, and extracellular enzyme activities in a Mojave Desert ecosystem exposed to…”
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Long-term field performance of a tunable diode laser absorption spectrometer for analysis of carbon isotopes of CO2 in forest air by D. R. Bowling, B. H. Vaughn, J. W. C. White, J. B. Miller, S. M. Schaeffer

“…Tunable diode laser absorption spectrometry (TDLAS) is gaining in popularity for measuring the mole fraction [CO2] and stable isotopic composition (δ13C) of…”
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Spatial and temporal properties of water vapor and latent energy flux over a riparian canopy by Cooper, D.I, Eichinger, W.E, Kao, J, Hipps, L, Reisner, J, Smith, S, Schaeffer, S.M, Williams, D.G

“…A scanning, volume-imaging Raman lidar was used in August 1997 to map the water vapor and latent energy flux fields in southern Arizona in support of the…”
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Reasons Patients With Chest Pain Delay or Do Not Call 911 by Meischke, Hendrika, Ho, Mary T, Eisenberg, Mickey S, Schaeffer, Sharon M, Larsen, Mary P

“…Study objective: To determine the reasons patients with suspected acute myocardial infarction (AMI) delay seeking medical care or do not call 911. Design:…”
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Delay between onset of chest pain and seeking medical care: the effect of public education by Ho, M T, Eisenberg, M S, Litwin, P E, Schaeffer, S M, Damon, S K

“…Thrombolytic therapy for acute myocardial infarction (AMI) is now routinely given in the emergency department and is being considered for pre-hospital care…”
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Long-term field performance of a tunable diode laser absorption spectrometer for analysis of carbon isotopes of CO 2 in forest air by Schaeffer, S. M., Miller, J. B., Vaughn, B. H., White, J. W. C., Bowling, D. R.

“…Tunable diode laser absorption spectrometry (TDLAS) is gaining in popularity for measuring the mole fraction [CO2] and stable isotopic composition (δ13C) of…”
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Utilization of emergency medical services for symptoms of acute myocardial infarction by Meischke, Hendrika, Eisenberg, Mickey S., Schaeffer, Sheri M., Damon, Susan K., Larsen, Mary Pat, Henwood, Daniel K.

“…To examine patient characteristics and situational and clinical factors that affect utilization of Emergency Medical Services (EMS) for symptoms of acute…”
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Characteristics of black patients admitted to coronary care units in metropolitan Seattle: Results from the Myocardial Infarction Triage and Intervention Registry (MITI) by Maynard, Charles, Litwin, Paul E., Martin, Jenny S., Cerqueira, Manuel, Kudenchuk, Peter J., Ho, Mary T., Kennedy, J.Ward, Cobb, Leonard A., Schaeffer, Sharon M., Hallstrom, Alfred P., Weaver, W.Douglas

“…Since 1988, 641 Mack and 11,892 white patients with chest pain of presumed cardiac origin have been admitted to coronary care units in 19 hospitals in…”
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