Solutes Transport In Soil
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Behavior of dissolved inorganic N in surface and sub-surface waters in a cultivated sugar cane area / Comportamento do N inorgânico dissolvido em águas superficiais e sub-superficiais em área com cultivo de cana-de-açúcar
The sugar cane is an important agricultural activity in Brazil and its productivity is related to several factors, such as the availability of suitable nutrients quantities, with emphasis on the nitrogen. However, the constant use of fertilizers increases the possibility of environmental contamination, mainly in water bodies. In this study were evaluated the
Publicado em: 2008
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2. Numerical simulation of the water movement and solutes in soil unsaturated / Simulação numérica do movimento de água e solutos em solos não saturados
The interest in studying problems of underground drainage and solutos transport not in soils saturated it has been increasing significantly in the last years, mainly because of the growing concern with the quality of the soil and of the environment in general. Applied fertilizers in agricultural lands move below the zone radicular of the plants and they can
Publicado em: 2007
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3. Efeito da temperatura no transporte dos íons potássio e nitrato no solo / Effect of temperature on the transport of the potassium and nitrate ions in a soil
In the study of solute dynamics in porous media, it is of extreme importance the knowledge of the medium and transporting liquid properties as well as of external factors as temperature. In this sense, the objective of this work was the determination of parameters for potassium and nitrate ions under different temperatures in miscible displacement experiment
Publicado em: 2007
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4. Teoria de cojuntos fuzzi no estudo da dinamica da agua e de solutos no solo / Fuzzi sets theory applied in the soil s water and solutes dynamics
Conhecer a dinâmica da água e de solutos no solo é condição imprescindível para a produção agrícola sustentável. O sucesso destes modelos numéricos em descrever a dinâmica da água e de solutos no solo está intimamente ligado à precisão com que os parâmetros físicohídricos, envolvidos nestes processos são determinados. De uma maneira geral
Publicado em: 2007
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5. Modelagem multiescala do acoplamento eletro-químico em um meio poroso argiloso com dependência do PH / Multiscale modeling of eletro-chemical couplings in clays including PH dependence
In this work we develop a three-scale mathematical modeling to describe electro-chemical couplings in clays using the asymptotic homogenization procedure of periodic structures. We consider the porous medium composed of kaolinite particles saturated by an electrolyte solution of water-solvent and four ionic solutes monovalents Na+, H+, Cl-, OH-At the nanosca
Publicado em: 2007
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6. Impact of Bacterial Biomass on Contaminant Sorption and Transport in a Subsurface Soil †
The objective of this study was to investigate the impact of bacterial biomass on the sorption and transport of three solutes (quinoline, naphthalene, and 45Ca) in a subsurface soil. Miscible displacement techniques were employed to measure sorption and transport of the above compounds during steady, saturated water flow in sterile and/or bacterium-inoculate
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7. Bacteriophage Transport in Sandy Soil and Fractured Tuff
Bacteriophage transport was investigated in laboratory column experiments using sandy soil, a controlled field study in a sandy wash, and laboratory experiments using fractured rock. In the soil columns, the phage MS-2 exhibited significant dispersion and was excluded from 35 to 40% of the void volume but did not adsorb. Dispersion in the field was similiar
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8. Permeability and Channel-Mediated Transport of Boric Acid across Membrane Vesicles Isolated from Squash Roots1
Boron is an essential micronutrient for plant growth and the boron content of plants differs greatly, but the mechanism(s) of its uptake into cells is not known. Boron is present in the soil solution as boric acid and it is in this form that it enters the roots. We determined the boron permeability coefficient of purified plasma membrane vesicles obtained fr
American Society of Plant Physiologists.
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9. Characterization of a Sinorhizobium meliloti ATP-Binding Cassette Histidine Transporter Also Involved in Betaine and Proline Uptake
The symbiotic soil bacterium Sinorhizobium meliloti uses the compatible solutes glycine betaine and proline betaine for both protection against osmotic stress and, at low osmolarities, as an energy source. A PCR strategy based on conserved domains in components of the glycine betaine uptake systems from Escherichia coli (ProU) and Bacillus subtilis (OpuA and
American Society for Microbiology.