Wet Fluxes
Mostrando 13-23 de 23 artigos, teses e dissertações.
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13. Nitrogen balance in paired small catchments (forest vs. pasture) in Rondonia state. / Balanço de nitrogênio em microbacias pareadas (floresta vs. pastagem) no estado de Rondônia.
The nitrogen cycle has been altered by anthropogenic activities, in response to the increment of cultures such, as the leguminous, fossil fuel use, and deforestation for agricultural uses and cattle raising. In temperate regions, there is considerable information about the biogeochemical cycle of nitrogen and the role of anthropogenic alterations on this cyc
Publicado em: 2005
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14. Balanço de energia e evapotranspiração de cafezal adensado em crescimento sob irrigação localizada. / Energy balance and evapotranspiration in a high density young coffee under located irrigation.
The objectives of this study were to evaluate the magnitude of global evapotranspiration (ETc) in a high density young coffee crop (3.5mx0.9m) under drip irrigation, the ETc partition considering hedgerows and interrows, and the partition of the available radiant energy between sensible and latent heat fluxes. The experiments were conducted from September 20
Publicado em: 2005
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15. "Respiração do solo sob florestas e pastagens na Amazônia Sul-Ocidental, Acre" / soil respiration under forests and pastures in Southwestern Amazonia, Acre
Conversion of forest to cattle pastures and subsequent abandonment of those pastures is occurring throughout the Amazon Basin, but the biogeochemical consequences of this land cover change are not well understood. In this study we assess the effects of land-use change on soil respiration in pastures, secondary forests and mature forests near Rio Branco, Acre
Publicado em: 2003
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16. Variabilidade interdiurna da convecção na América do Sul: a propagação meridional da convecção / Day-to-day convective variability over south America: the meridional propagation of convection.
A climatology for the meridional propagation of convection (MPC) over South America (SA) for the 1983-93 years is built by using cloud and atmospheric circulation composites. Results reveal three important types of MPC over SA. Type 1 focuses the frequent penetrations of cold fronts that organize tropical convection and move with it towards equator. Type 1 i
Publicado em: 2003
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17. Some theoretical and experimental aspects od the surface layer above the "Pantanal Matogrossense" / Alguns aspectos teoricos e experimentais da camada limite superficial acima do Pantanal Matogrossense
In this study it was used data from the micrometeorological tower located at Miranda city ( 19 degree 6 S 5 degree 0 W), in the Pantanal Matogrossense, in order to characterize aspects of the structure of turbulence in the atmospheric boundary layer, in the transition period between wet and dry seasons. The Wavelet Transform was used in the analysis of the t
Publicado em: 1999
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18. Quantification of the maximum capacity for active sodium-potassium transport in rat skeletal muscle.
1. Intact skeletal muscle fibres have been shown to contain a high concentration of [3H]ouabain binding sites (100-800 pmol g wet wt.-1). Under resting conditions, however, it seems that in isolated muscles only 2-6% of the corresponding expected capacity for active Na+-K+ transport is utilized. 2. In order to determine whether all [3H]ouabain binding sites
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19. Aerial Dispersal of Epiphytic Bacteria over Bean Plants
Plant canopies are strong sources of bacterial aerosols during sunny days when the leaves are dry. Bacterial concentration, upward flux, and deposition onto exposed petri plates were measured over snap beans during three growing seasons. A net upward flux of bacteria occurred only during the warm part of sunny days, not at night when leaves were wet with dew
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20. Compartmentalized energy transfer in cardiomyocytes: use of mathematical modeling for analysis of in vivo regulation of respiration.
The mathematical model of the compartmentalized energy transfer system in cardiac myocytes presented includes mitochondrial synthesis of ATP by ATP synthase, phosphocreatine production in the coupled mitochondrial creatine kinase reaction, the myofibrillar and cytoplasmic creatine kinase reactions, ATP utilization by actomyosin ATPase during the contraction
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21. Preferential states in soil moisture and climate dynamics
Summer precipitation in continental midlatitude regions is significantly contributed by local recycling, i.e., by moisture returning to the atmosphere through evapotranspiration from the same region. On the other hand, reduced soil moisture availability may limit evapotranspiration rates with effects on the planetary boundary layer dynamics through the parti
National Academy of Sciences.
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22. The kinetics of ouabain-sensitive ionic transport in the rabbit carotid artery.
1. Ouabain (0.1 mM)-sensitive 42K influx and 24Na efflux have been measured in rabbit carotid arteries under conditions of high cellular potassium, [K]i, as well as sodium, [Na]i. About 50% of the total fluxes are ouabain-sensitive (active) under conditions of high [K]i. 2. The extracellular space, determined by 60Co-EDTA, was relatively large in comparison
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23. Relative contribution of glycogen synthesis and glycolysis to insulin-mediated glucose uptake. A dose-response euglycemic clamp study in normal and diabetic rats.
To examine the relationship between plasma insulin concentration and intracellular glucose metabolism in control and diabetic rats, we measured endogenous glucose production, glucose uptake, whole body glycolysis, muscle and liver glycogen synthesis, and rectus muscle glucose-6-phosphate (G-6-P) concentration basally and during the infusion of 2, 3, 4, 12, a