Ammonium 15n
Mostrando 25-36 de 152 artigos, teses e dissertações.
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25. Efeito da homeopatia Ammonium Carbonicum na minimização da lixiviação de nitrato
Avaliou-se o efeito da solução homeopática Ammonium Carbonicum em duas dinamizações, CH3 e CH30, sobre a lixiviação de NO-3. A hipótese inicial foi a de que essas soluções homeopáticas atuariam na microbiota do solo otimizando a utilização de N pela planta. Esse estudo foi conduzido em casa-de-vegetação e utilizaram-se amostras deformadas do h
Ciência e Agrotecnologia. Publicado em: 2007-04
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26. Growth kinetic and longevity of the Kluyveromyces lactis cultures under nitrogen limitation / Cinética de crescimento e longevidade de culturas de Kluyveromyces lactis sob estresse por nitrogênio
In order to investigate the stress condition imposed by nitrogen limitation on kinetic of growth and aging of Kluyveromyces lactis, the kinetics constants of K. lactis culture as function of ammonium sulfate concentration were determined. The effect of aging of the culture on its specific initial growth rate was evaluated. Signals of aging such as cell wall
Publicado em: 2007
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27. Caracterização cinética da (Na+,K+)-ATPase da fração microsomal do tecido branquial do siri Callinectes ornatus ordway, 1863 (Crustacea, Portunidae) / A kinetic characterization of the (Na+,K+)-ATPase in gill microsomes from the crab Callinectes ornatus.
(Na+, K+)-ATPase present on branchial tissue osmoregulatory crustaceans is an essential component of their osmotic and ionic regulation system. Apparently, this enzyme also have a relevant role in the active excretion de NH4+ through the branchial crustacean tissue. A (Na+, K+) ATPase-rich microsomal fraction was prepared by differential centrifugation from
Publicado em: 2007
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28. Nutritional aspects of potato plants for seed tuber production in protected condition / Aspectos nutricionais da batateira para produção de tubérculo-semente em ambiente protegido
In spite of its importance and the great number of studies on the potato (Solanum tuberosum L.) crop, in the tropical conditions the existing researches on mineral nutrition of the potato plant grown for seed tuber production, in field and in protected conditions, are scarce. The seed tuber production in protected conditions, as the system used by IAC (São
Publicado em: 2007
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29. Crescimento e capacidade de biosorção de metais por Pleurotus sajor-caju, em cultivo líquido e em cultivo sólido
In this work, Pleurotus sajor-caju PS2001 was cultivated in solid-state, in a medium formulated with sawdust of Pinus spp and wheat bran, to which had been added cupric sulphate, manganese sulphate and ammonium sulphate. Different treatments had been made with these salts, aiming at the solid cultive medium otimization for attainment of bigger productivity i
Publicado em: 2007
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30. Synthesis and Structural Analysis of New Coordination Polymers involving Seleninatos of Alkaline and Alkaline Earth Metals / Síntese e Análise Estrutural de Novos Polímeros de Coordenação Envolvendo Seleninatos de Metais Alcalinos e Alcalinos Terrosos
Seven new compounds involving the phenylseleninato ligand and alkaline and alkaline earth metals were obtained in this work: poly-phenylseleninato lithium(I) (1), catena-polybis(aqua)-phenylseleninato sodium(I) (2), poly-phenylseleninato potassium(I) (3), polytetraquis(aqua)-bis(phenylseleninato) magnesium(II) (4c), catena-poly-bis(phenylseleninic acid)-bis(
Publicado em: 2007
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31. Destino do nitrogênio (15N) do fertilizante em uma cultura de café / The fate of fertilizer nitrogen (15N) in a coffee crop
The coffee is one of the most important agribusiness products of Brazil and, although its management practices are already well defined, several cropping aspects still need a deeper understanding. Among these the nutrition of the coffee plant in respect to nitrogen is one of the main subjects needing more clarification. To contribute to this aspect, several
Publicado em: 2006
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32. Dinâmica do nitrogênio na cultura do milho (Zea mays L.), em cultivo sucessivo com aveia preta (Avena strigosa), sob implantação do sistema plantio direto / Nitrogen dynamics in maize (Zea Mays L) and black oats (Avena srigosa) successive cropping under the introduction of the no-tillage system
The general objective of this work was to study the dynamics of nitrogen in the soil-plant system of two maize crops with a black oats one in between, introducing the no-tillage system. Besides, fertilizing the first maize crop with 15N enriched nitrogen fertilizer, it was also objective of this work to assess the total and the derived from fertilizer nitrat
Publicado em: 2006
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33. Protein Metabolism in Brazilian healthy elderly using glycine labeled with 15N / Avaliação do metabolismo protéico em idosos brasileiros independentes utilizando a glicina marcada com 15N
Protein metabolism in the elderly, analyzed though the protein turnover rate, is of great importance to muscle trophysm and maintenance of activities of daily living. Some studies in the elderly have shown a reduction of protein synthesis with aging, while others found that it is maintained and degradation increased. Methods using stable isotopes are of grea
Publicado em: 2006
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34. Purificação e caracterização de uma ß-N-acetillhexosaminadase extraída do mamífero marinho Sotalia fluviatilis
This report shows 2232 times purification of a βNAcetylhexosaminidase from hepatic extracts from the sea mammal Sotalia fluviatilis homogenate with final recovery of 8,4%. Sequenced steps were utilized for enzyme purification: ammonium sulfate fractionation, Biogel A 1.5 m, chitin, DEAESepharose and hydroxyapatite chromatographies. The protein molecular
Publicado em: 2006
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35. Purificação e caracterização de uma β-glucuronidase extraída do molusco mesogastropoda ampularidade Pomacea sp
This work studies the involved enzymatic way in the metabolism of glycosaminoglycans sulfateds in the mollusc Pomacea sp. Had been identified endoglycosidases and exoglycosidases in the enzymatic extract of the mollusc Pomacea sp by means of hydrolysis activity in condroitim sulphate of whale cartilage and of the p-Nitrofenil-β-glucuronide, respectively
Publicado em: 2006
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36. Management of corn crop nitrogen fertilization after soybean cultivation on no tillage system at the Brazilian Cerrado / "Manejo da adubação nitrogenada na cultura do milho após cultivo da soja em sistema semeadura direta no Cerrado"
Cultivation of soil cover crops as second crop willing to produce straw and protect the soil after the harvest of the summer crop at the Brazilian Cerrados region had been one of the biggest challenges faced by farmers that decided for the no tillage system. Another problem inherent to the no tillage system in the Cerrados in relation with the nitrogen manag
Publicado em: 2006