Nitrogen Limitation
Mostrando 13-24 de 284 artigos, teses e dissertações.
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13. Utilização das técnicas de ELISA e BIOLOG para estudos de diversidade intra-específica em isolados de Azospirillum amazonense associados a diferentes espécies de brachiaria.
ABSTRACT: This limitation of nitrogen is considered one of the most important factors influencing the Brazilian pastures degradation. However there are evidences that pastures formed by some species of the Brachiaria genus could be benefited by the biological fixation (BNF), guaranteeing a higher longevity to these pastures. Previous studies showed that the
Planaltina. Publicado em: 2011
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14. Associação de bactérias promotoras de crescimento de plantas do gênero Azospirillum com diferentes espécies de brachiaria.
ABSTRACT: The limitation of nitrogen is considered one of the most important factors to the pastures degradation. However there are evidences that pastures formed by some species of the genus Brachiaria could be benefit with the biological nitrogen fixation process (BNF), guaranteeing to these pastures higher longevity. The diazotrophic bacteria founded in a
Planaltina. Publicado em: 2011
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15. Tratamento de efluente anaeróbio : condicionamento em filtro de areia visando lançamento e reúso / Anaerobic effluent treatment : sand filters conditioning to disposal or reuse applications
Increasing scarcity of freshwater due to demographic growing, urbanization and, climate changing are the reason of increasing use of the wastewater in agriculture. Nowadays, this practice is a reality, mainly in São Paulo in the southeast areas, where the conflicts caused by multiples use of water are constant. Based on this situation, the aiming of this in
Publicado em: 2011
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16. Phosphorus and nitrogen interaction: loss of QC identity in response to P or N limitation is antecipated in pdr23 mutant
Alteração na arquitetura da raiz é uma estratégia adaptativa importante, usada pelas plantas, em resposta à disponibilidade limitada de nutrientes para aumentar as chances de adquirí-los. O centro quiescente (CQ) participa na mudança da atividade meristemática, causando diferenciação e induzindo um programa determinado de crescimento. O mutante de
Brazilian Journal of Plant Physiology. Publicado em: 2011
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17. Tempo de residÃncia da Ãgua em um sistema experimental de aquicultura integrada com camarÃes, ostras e macroalgas. / Residence time of water in an experimental integrated aquaculture with shrimp, oysters and seaweeds.
Shrimp culture presented at a world-wide level a significant growth in recent years, mainly in tropical and subtropical regions, however, this expansion comes with diverse environment negative impacts, mainly related to the cultures effluents, which are rich in nitrogen and phosphorous, that are many times discarded in the environment without any previous tr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2009
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18. Contribution for the Brazilian database to support life cycle assessment: nitrogen fertilizers. / Contribuição ao banco de dados brasileiro para apoio à avaliação do ciclo de vida: fertilizantes nitrogenados.
The main limitation of Life Cycle Assessment (LCA) is the necessity for collection a large number of representative data for the region under study. This limitation can get rounded by the construction of regional databases, or inventories of elements that are common to the life cycle of many products. Among these elements are the chemical fertilizers. In thi
Publicado em: 2009
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19. Utilização de sulfeto como doador de elétrons para a desnitrificação autotrófica aplicada ao tratamento de esgoto sanitário / Utilization of sulfide as electron donor in autotrophic denitrification applied to treatment of domestic sewage
The feasibility of autotrophic denitrification of effluent from anaerobic reactor treating domestic sewage using sulfide as electron donor was evaluated. Prior researches reveals sulfide into liquid phase of effluents and biogas can be utilized as electron donor for denitrification. However, information about the interaction between carbon, nitrogen and sulf
Publicado em: 2009
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20. Effects of ZmDof1 and OsDof25 transcriptional factors superexpression on nitrogen usage efficiency in Arabidopsis. / Efeito da superexpressão dos fatores de transcrição ZmDof1 e OsDof25 sobre a eficiência de uso de nitrogênio em Arabidopsis.
To improve nitrogen usage efficiency in plants the rice transcriptional factor OsDof25 was identified and cloned, whose probably orthologe is the maize ZmDof1, already identified and partially characterized. The ZmDof1 was also cloned for comparative analysis with OsDof25, in order to confirm this last one as ZmDof1 orthologe in rice. The constructions for A
Publicado em: 2009
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21. Hipótese evolutiva sobre a assimilição de compostos nitrogenados por metazoários: a limitação α-aminoácidos / Evolutionary hypothesis on the nitrogenous compounds uptake by metazoan: the limitation to α-aminoacids
Metabolic pathway evolution models are molecular and computational based, and do not take account the physiological and ecological contexts in which organisms are inserted. Thus using the nitrogen metabolism as a platform, an evolutionary hypothesis on the α-amino acids utilization by metazoans was proposed. The objective of the present work is to trace
Publicado em: 2008
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22. Balanço de 15N em sistemas de produção de milho para adoção do plantio direto no Oeste baiano / 15N balance in maize production systems for no-till in the west State of Bahia
In Cerrado of the west of Bahia state the climate difficulties the formation of vegetable residue for no-tillage. Intercropping cultures is an alternative for climate limitation, for producing biomass to the system. Cotton producers from this region use maize culture for rotation and, in some cases, for formation of straw, with fertilization done exclusively
Publicado em: 2008
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23. Eutrophication of Cruzeta reservoir in the representative basin of the Seridó river - RN. Natal / Eutrofização do Reservatório Cruzeta na bacia representativa do rio Seridó RN
Eutrophication has been listed as one of the main problems of water pollution on a global level. In the Brazilian semi-arid areas this problem takes even greater proportions due to characteristical water scarcity of the region. It is extremely important to the predictive eutrophication models development and to the reservoirs management in the semi-arid regi
Publicado em: 2008
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24. Taxonomia e diversidade genética de rizóbios microssimbiontes de distintas leguminosas com base na análise polifásica (Box-PCR e 16 S RNAr) e na metodologia de MLSA
The term rhizobia is generically applied to bacteria capable of fixing the atmospheric nitrogen (N2) and converting it to a form assimilable by the plant, when in symbiosis with plants of the Leguminosae family. However, besides their ecological and economic importance, the rhizobia have not been subject of many studies. Based on the data obtained with t
Publicado em: 2008