Inorganic Nutrients
Mostrando 13-24 de 104 artigos, teses e dissertações.
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13. Dissolved inorganic nutrients and chlorophyll on the narrow continental shelf of Eastern Brazil
A plataforma Leste do Brasil é estreita e sofre influência de um sistema de correntes de borda oeste, apresentando baixa produtividade biológica em comparação com outras regiões. Neste estudo, a distribuição de massas de água, nutrientes inorgânicos dissolvidos, clorofila-a e sólidos suspensos totais (SST) na plataforma interna (<35 m de profundid
Braz. j. oceanogr.. Publicado em: 2014-03
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14. Yearly variation of bacterial production in the Arraial do Cabo protection area (Cabo Frio upwelling region): an evidence of anthropogenic pressure
Arraial do Cabo is where upwelling occurs more intensively on the Brazilian coast. Although it is a protection area it suffers anthropogenic pressure such as harbor activities and sporadic sewage emissions. Short-time studies showed a high variability of bacterial production (BP) in this region but none of them evaluated BP during long periods in a large spa
Braz. J. Microbiol.. Publicado em: 2013-12
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15. DinÃmica de fÃsforo em manguezais impactados por Ãguas residuÃrias no Estado do CearÃ. / Dynamics of phosphorus in mangroves impacted by the state of CearÃ.
Recent studies demonstrated the efficacy of mangrove retaining nutrients and, in particular, the ability of the mineral component of the buffer in its high soil phosphorus levels. In general, the mangroves have been considered as important sinks of nutrients due to its high capacity purification of effluents. However, depending on the geochemical conditions
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/06/2012
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16. DISSOLVED INORGANIC NUTRIENTS AND HYDROCARBONS IN SPM FLOW IN GUANABARA BAY DURING TIDAL CYCLE / FLUXO DE NUTRIENTES INORGÂNICOS DISSOLVIDOS E HIDROCARBONETOS NO MPS NA BAÍA DE GUANABARA DURANTE CICLO DE MARÉ
A Baía de Guanabara (BG) serve como estuário para 90 rios e canais, é um ambiente eutrofizado, com intensa produtividade primária e que recebe considerável aporte de nutrientes, principalmente oriundos do despejo de esgotos e drenagem fluvial. Ali se encontra também o segundo maior complexo industrial do Brasil. Devido a esses aspectos geradores de alt
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/04/2012
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17. Resposta da cultura do milho aos fertilizantes fosfatados e nitrogenados revestidos com polímeros / Response of maize to polymer-covered phosphate and nitrogen fertilizers
The effective use of fertilizers, besides resulting in greater yield, can reduce production costs, with positive results in the end of the cropping season. Soil correction and fertilization in intensive maize production systems represent, on average, 40% to 45% of the production cost. Phosphorus is considered as a nutrient with low absorption by plants due t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/01/2012
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18. Analysis of the NTPDase and ecto-5'-nucleotidase profiles in serum-limited Trichomonas vaginalis
Trichomonas vaginalis is a parasite of the human urogenital tract that causes trichomonosis, the most prevalent non-viral sexually transmitted disease. Ectonucleoside triphosphate diphosphohydrolase (NTPDase) family members, which hydrolyse extracellular ATP and ADP and ecto-5′-nucleotidase, which hydrolyses AMP, have been characterised in T. vaginalis. Fo
Memórias do Instituto Oswaldo Cruz. Publicado em: 2012-03
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19. Fluxos de nutrientes associados às descargas de água subterrânea para a Lagoa Mangueira (Rio Grande do Sul, Brasil)
This study assesses the importance of groundwater discharge to dissolved nutrient levels in Mangueira Lagoon. A transect of an irrigation canal in the margin of Lagoon demonstrated a strong geochemical gradient due to high groundwater inputs in this area. Using 222Rn as a quantitative groundwater tracer, we observed that the flux of dissolved inorganic nitro
Química Nova. Publicado em: 2012
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20. Avaliação de parâmetros e produção de materiais de referência de suplemento mineral para nutrientes e contaminantes inorgânicos / Evaluation of parameters and production of reference materials for mixing mineral nutrients and inorganic contaminants
Neste trabalho foi preparado um material candidato a material de referência de suplemento mineral para gado de leite. Foram determinados os constituintes inorgânicos e nutrientes Ca, K, Na, P, Cu, Fe, Mn, Mg, Zn e os contaminantes As, Cd e Pb. O material foi moído, peneirado até atingir uma granulometria inferior a 80μm e envasado. Foi feito um estu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/09/2011
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21. A influência do fósforo na toxicidade de cobre e composição bioquímica de Chlorella vulgaris
Metal toxicity to microalgae is dependent on environmental conditions, evolutionary history of the microalgae, and previous exposure of the organism to the specific metal. Also, it is importantly influenced by the physiological condition of the algae in the moment of metal exposure. In this research we investigated several combinations of phosphorus (P) and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/09/2011
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22. Avaliação da expressão e localização da conexina 43 na injúria isquêmica renal aguda / Evaluation of Connexin 43 expression and localization in renal acute ischemic injury
The cells require contact with other cells and the extracellular matrix for tissue formation. Gap junctions are narrow channels connecting the cytoplasm of two adjacent cells, promoting the passage of inorganic ions, amino acids, nucleotides and other metabolites. These junctions are composed of two conexons or hemichannels, crossing the cell plasma membrane
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
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23. Bacterioplankton features and its relations with doc characteristics and other limnological variables in Paraná river floodplain environments (PR/MS-Brazil)
Since the introduction of the Microbial Loop concept, many studies aimed to explain the role of bacterioplankton and dissolved organic carbon (DOC) in aquatic ecosystems. Paraná River floodplain system is a very complex environment where these subjects were little explored. The aim of this work was to characterize bacterial community in terms of density, bi
Brazilian Journal of Microbiology. Publicado em: 2011-09
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24. Microrganismos e disponibilidade de fósforo (P) nos solos: uma análise crítica.
ABSTRACT: Cerrado soils are extremely old, highly weathered and depleted in essential nutrients, especially P. For this reason, the addition of P fertilizers is mandatory in order to obtain economical yields of annual crops. Soil microorganisms play a key role in the P cycle. The P immobilized in the soil microbial biomass acts as reservoir of this element.
Planaltina. Publicado em: 2011