Phosphorous Transport
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Modelo SWAT2005 aplicado Ãs sub-bacias dos rios Conrado e Pinheiro â Pato Branco-PR / Model SWAT2005 aplicability to conrado and pinheiro river watersheds - Pato Branco/PR
O desenvolvimento de modelos hidrolÃgicos capazes de predizer o impacto das fontes difusas de poluiÃÃo e do uso e ocupaÃÃo do solo na qualidade das Ãguas, superficiais e subterrÃneas, tem sido de grande auxÃlio no estudo de agroecossistemas agrÃcolas. Com esse objetivo, foi utilizado o modelo Soil and Water Assessment Tool (SWAT 2005), para avaliar
Publicado em: 2008
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2. Nitrogen Enhancement of Phosphate Transport in Roots of Zea mays L. 1: I. Effects of Ammonium and Nitrate Pretreatment
The effect of nitrogen status on phosphorous uptake and translocation was examined in 6-day-old dark-grown decapitated maize seedlings exposed to 25 micromolar phosphorous. Transfer to complete solutions containing 1 millimolar ammonium resulted in an increase in phosphorous uptake rate after 6 to 8 hours. The stimulus remained effective for at least 5.5 hou
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3. Nitrogen Enhancement of Phosphate Transport in Roots of Zea mays L: II. Kinetic and Inhibitor Studies
Exposure to 1 millimolar ammonium pretreatments increased Vmax for phosphorous uptake in dark-grown decapitated maize seedlings without a statistically measurable change in Km. Sulfate uptake also was stimulated. The stimulation in phosphorous uptake due to ammonium pretreatment was greater in seedlings grown without phosphorous than in those grown with 25 m
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4. Effects of free fatty acids on glucose transport and IRS-1–associated phosphatidylinositol 3-kinase activity
To examine the mechanism by which free fatty acids (FFA) induce insulin resistance in human skeletal muscle, glycogen, glucose-6-phosphate, and intracellular glucose concentrations were measured using carbon-13 and phosphorous-31 nuclear magnetic resonance spectroscopy in seven healthy subjects before and after a hyperinsulinemic-euglycemic clamp following a
American Society for Clinical Investigation.