Availability And Transport Of Nutrient
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. A dinâmica do fitoplâncton em uma várzea Amazônica variações sazonal e nictimeral (Várzea do Lago Grande de Curuai Pará, Brasil) / The dynamics of phytoplankton in an Amazon fllodplain - seasonal and nictemeral variations (Lago Grande de Curuai - Pará, Brasil)
The river-floodplain systems are environments submitted a lateral overflow of river channel due the rains and/or underground waters. They are controlled by the type of climate, morphology and local effects. The lowland lakes are also highly productive because of the rich sources of primary carbon. The sediments transport and suspended and dissolved matter ar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2011
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2. Simulation of balance and transport of nitrogen and phosphorus from manure applied in agricultural areas - case study: Toledo river watershed - Paraná - Brazil. / Simulação do balanço e transporte de nitrogênio e fósforo provenientes de dejetos animais aplicados em áreas agrícolas - estudo de caso: bacia do Rio Toledo - Paraná - Brasil.
O presente trabalho apresenta um modelo computacional que visa servir de apoio ao processo de licenciamento de áreas para criação intensiva de animais. Trata-se de um modelo que descreve o comportamento do nitrogênio e do fósforo, oriundos da aplicação em solos agrícolas de dejetos da criação de animais e seu impacto nas bacias hidrográficas. Este
Publicado em: 2009
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3. Regulation of Gene Expression by Phosphate in the Filamentous Fungus Neurospora crassa / Regulação da expressão gênica pelo fosfato no fungo filamentoso Neurospora crassa
Gene expression regulation is crucial for all organisms to rapidly adapt to environmental changes. These adaptive mechanisms are highly complex and most of them have not been completely elucidated. The inorganic phosphate (Pi), an essential nutrient for all organisms, is required for important cellular processes, such as nucleic acids biosynthesis and metabo
Publicado em: 2009
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4. Fatores que influenciam na produtividade dos oceanos: a importÃncia do fluxo de difusÃo dos nutrientes para a biomassa do fitoplÃncton na regiÃo oceÃnica do nordeste brasileiro
In the tropical oceanic region the phytoplankton primary biomass is controlled by light availability and inorganic dissolved nutrients, besides other physical factors as turbulence and sedimentation. The water properties in the photic zone are subjected by a number of different forcing intensities opposite to the deeper waters which varies regularly. In Nort
Publicado em: 2003
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5. Dinâmica de populações de cianobactérias em reservatório eutrofizado no semi-árido nordestino brasileiro.
The Armando Ribeiro Gonçalves reservoir, located in the semi-arid of the Rio Grande do Norte (06o08 S ; 37o 07 W), in Northeast Brazil, represents 68% of the total surface water accumulated in the state. The reservoir, with maximum volumetric capacity of 2.4 x 109, provides 400 thousands habitants and also is destined to irrigation, leisure and fishing. It
Publicado em: 2003
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6. Nitrogen availability alters the expression of carnivory in the northern pitcher plant, Sarracenia purpurea
Atmospheric transport and deposition of nutrients, especially nitrogen, is a global environmental problem with well-documented consequences for ecosystem dynamics. However, monitoring nitrogen deposition is relatively expensive, monitoring stations are widely spaced, and estimates and predicted impacts of nitrogen deposition are currently derived from spatia
The National Academy of Sciences.
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7. Transcriptional Response of Pasteurella multocida to Nutrient Limitation
Bacteria often encounter environments where nutrient availability is limited, and they must adapt accordingly. To identify Pasteurella multocida genes that are differentially expressed during nutrient limitation, we utilized whole-genome microarrays to compare levels of gene expression during growth in rich and minimal media. Our analysis showed that the lev
American Society for Microbiology.
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8. Transgenically Enhanced Sorbitol Synthesis Facilitates Phloem Boron Transport and Increases Tolerance of Tobacco to Boron Deficiency1
The mobility of elements within plants contributes to a plant species' tolerance of nutrient deficiencies in the soil. The genetic manipulation of within-plant nutrient movement may therefore provide a means to enhance plant growth under conditions of variable soil nutrient availability. In these experiments tobacco (Nicotiana tabacum) was engineered t
American Society of Plant Physiologists.
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9. Between feast and famine: endogenous inducer synthesis in the adaptation of Escherichia coli to growth with limiting carbohydrates.
Escherichia coli adapted to growth with low carbohydrate concentrations bypassed the requirement for exogenous inducer with at least three well-studied sugar regulons. Induction of mgl and gal genes became independent of added galactose in bacteria approaching stationary phase or during continuous culture with micromolar glucose in the medium. Bacteria becam
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10. Ethylene Modulates Root-Wave Responses in Arabidopsis1[w]
When stimulated to bend downward by being held at 45 degrees off vertical but unable to penetrate into agar-based media, Arabidopsis roots develop waving and looping growth patterns. Here, we demonstrate that ethylene modulates these responses. We determined that agar-containing plates sealed with low-porosity film generate abiotic ethylene concentration
The American Society for Plant Biologists.
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11. Copper transport into the secretory pathway is regulated by oxygen in macrophages
Copper is an essential nutrient for a variety of biochemical processes; however, the redox properties of copper also make it potentially toxic in the free form. Consequently, the uptake and intracellular distribution of this metal is strictly regulated. This raises the issue of whether specific pathophysiological conditions can promote adaptive changes i
Company of Biologists.
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12. Major Alterations of the Regulation of Root NO3− Uptake Are Associated with the Mutation of Nrt2.1 and Nrt2.2 Genes in Arabidopsis1
The role of AtNrt2.1 and AtNrt2.2 genes, encoding putative NO3− transporters in Arabidopsis, in the regulation of high-affinity NO3− uptake has been investigated in the atnrt2 mutant, where these two genes are deleted. Our initial analysis of the atnrt2 mutant (S. Filleur, M.F. Dorbe, M. Cerezo, M. Orsel, F. Granier, A. Gojon, F. Daniel-Vedele [20
American Society of Plant Physiologists.