Compostos Nitrogenicos
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Relação entre longevidade foliar, nitrogenio e compostos secundarios em folhas de leguminosas arboreas
A duração do ciclo de vida foliar determina características distintas nas folhas, que são relevantes para a sobrevivência da planta em diferentes habitats. Tem sido verificado que as espécies perenifólias apresentam mecanismos mais eficientes de conservação de nitrogênio (N) em relação às espécies decíduas. Esses mecanismos são: eficiência d
Publicado em: 2005
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2. Nitrogenio em semicondutores amorfos
This work presents experimental data referring to the effects resulting from the introduction of nitrogen into amorphous silicon and germanium. AlI the samples studied in this work were deposited as thin films using the rf reactive sputtering technique in highly controlled Ar+(H2)+N2 gaseous atmospheres. It is shown that either the nitrogen presence and its
Publicado em: 1995
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3. Estudo do processo de redução de nitrato durante o desenvolvimento inicial e no estagio reprodutivo de plantas de cafe (coffea arabica L.)
The distribution of the "n vivo" nitrate reductase activity in leaves and roots of young coffee plants and in leaves of adult plants during the reproductive stage were studied. The young plants were cultivated in sand irrigated with nutrient solution in the greenhouse. The adult plants were cultivated in hydroponics, in ambient conditions. The modified assay
Publicado em: 1987
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4. Efeito de fonte externa de nitrogenio no transporte de compostos nitrogenados em plantas de soja glycine max (L.) Merril cultivar Santa Rosa
Soybean plants, innoculated with rhizobium japonicium, were grown in vermiculite with a nitrogen deficient nutrient solution in a greenhouse. The effect of NO-3 and NH+4 on nodule activity was studied in terms of N2-fixing capacity (acetylene reduction) and ureide and amino acid levels of the xylem sap. Nodulated plants were treated with nutrient solutions c
Publicado em: 1986