Nutrient Enrichment
Mostrando 13-24 de 75 artigos, teses e dissertações.
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13. Desempenho de plantas de cobertura no controle da erosão hídrica no Sul de Minas Gerais / Performance of cover crops to control erosion in the South of Minas Gerais
The erosion initiates with the impact of the raindrop on the soil surface, causing the transport of sediment, nutrients and organic matter. To reduce this erosion, the use of conservation practices, such as proper management and planting of cover crops that reduce these losses, is essential. The objective of this study was to evaluate the potential of plant
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2009
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14. Procedures and chemical evaluation of parameters of nutritional interest of spinach sold in Bahia. / Procedimentos e avaliação química de parâmetros de interesse nutricional de espinafre comercializado na Bahia.
O espinafre produzido e mais consumido no Brasil, denominado como espinafre da Nova Zelândia (Tetragonia expansa), difere significativamente do espinafre verdadeiro (Spinacia oleracea) produzido em muitos países do hemisfério norte. As diferenças ocorrem não apenas na classificação botânica, mas em muitas das características químicas dos vegetais.
Publicado em: 2009
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15. ENRIQUECIMENTO TRÃFICO EM AMBIENTES SUBTERRÃNEOS E SUAS APLICAÃÃES PARA A CONSERVAÃÃO DA BIODIVERSIDADE DE INVERTEBRADOS AQUÃTICOS. / Trophic enrichment in underground environments and its applications in the biodiversity conservation of aquatic invertebrates.
The permanent absence of light and high tendency to oligotrophism are often considered to be determining factors in the establishment of species in underground systems There is a lack of studies concerning characterization of fauna and its relation with biological processes (such as production transference nutrient processing) in cave systems The aim of the
Publicado em: 2008
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16. Pré-cloração associada à adsorção em carvão ativado em pó e flotação por ar dissolvido na remoção de microcistina presente em três diferentes concentrações em águas provenientes de reservatório eutrofizado / Prechlorination associated to adsorption with powdered activated carbon and dissolved air flotation in the removal of three concentrations of microcystin present in eutroficated reservoir water
The disordered growth of cities, the use of planting areas near the water sources and the launch of domestic and industrial wastewater without treatment are the main sources of water bodiespollution. Such pollution contributes to increase the nutrient loading in the water bodies. In association with climatic factors, this enrichment of nutrient provides suit
Publicado em: 2008
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17. Efeitos da tilápia do Nilo (Oreochromis niloticus) e do enriquecimento por nutrientes sobre a comunidade planctônica em um lago artificial no semi-árido brasileiro
O principal objetivo deste estudo foi testar a hipótese de que a introdução da tilápia do Nilo (Oreochromis niloticus) e o enriquecimento por nutrientes (N e P) interagem sinergicamente ocasionando mudanças na estrutura da comunidade planctônica através do aumento da biomassa fitoplanctônica e diminuição da transparência da água em um res
Publicado em: 2008
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18. NITROGEN IN GRAPEVINE: RECOVERY, ACCUMULATION AND ALTERATIONS IN THE YIELD AND GRAPE COMPOSITION / NITROGÊNIO EM VIDEIRA: RECUPERAÇÃO, ACUMULAÇÃO E ALTERAÇÕES NA PRODUTIVIDADE E NA COMPOSIÇÃO DA UVA
The rate of nitrogen (N) in grapevines in the Rio Grande do Sul (RS) State, Southern Brazil, is established considering N content in leaves or leaves petioles and yield expectation limits. Once N fertilization needs have been diagnosed, the N is applied in indefinite times. However, N fertilization recommendations dont consider the impact of N fertilization
Publicado em: 2008
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19. Contribution to limnological knowledge of brazilian semi-arid reservoir that supply Fortalezas metropolitan region: Pacajus and Gavião dams (Ceará, Brazil) / Contribuição ao conhecimento limnológico de reservatórios do semi-árido brasileiro que abastecem a região metropolitana de Fortaleza: Açudes Pacajus e Gavião (Ceará, Brasil)
The main aim of this research was to investigate the influence of climatic and hydrodynamicsalterations about physical stability, resources availability, zooplankton community structure and spatial heterogeneity standard of Pacajus and Gavião dams, collected at two-month period between Nov. 1988 and Dec. 1998. In the reservoirs, the sample stations were dis
Publicado em: 2007
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20. Avaliação do ciclo de vida do álcool etílico hidratado combustível pelos métodos EDIP, exergia e emergia / Life cycle assessment of hydrated ethylic alcohol fuel by EDIP, exergy and emergy methods
One of the most integrated, complete and efficacious means for the environmental management of productive activities is based on the life cycle of the product, whose main tool is the life cycle assessment. The assessed product is the hydrated ethylic alcohol fuel because of the environmental improvement possibilities during its life cycle, an alternative for
Publicado em: 2005
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21. Effects of Atmospheric CO2 Enrichment on the Growth and Mineral Nutrition of Quercus alba Seedlings in Nutrient-Poor Soil 1
One-year-old dormant white oak (Quercus alba L.) seedlings were planted in a nutrient-deficient forest soil and grown for 40 weeks in growth chambers at ambient (362 microliters per liter) or elevated (690 microliters per liter) levels of CO2. Although all of the seedlings became severely N deficient, CO2 enrichment enhanced growth by 85%, with the greatest
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22. Comparison of media and methods for detecting and enumerating Listeria monocytogenes in refrigerated cabbage.
Direct plating, selective enrichment, and cold enrichment followed by secondary selective enrichment procedures were compared for detecting and enumerating Listeria monocytogenes in chopped cabbage stored at 5 degrees C for up to 64 days. Addition of Fe3+ to solid media enhanced detection of the organism. Cold enrichment (5 degrees C) in nutrient broth and b
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23. Methanogenesis from acetate: enrichment studies.
An acetate enrichment culture was initiated by inoculating anaerobic sludge from a mesophilic methane digestor into a mineral salts medium with calcium acetate as the sole carbon and energy source. This enrichment was maintained indefinitely by weekly transfer into medium of the same composition. A study of this enrichment disclosed an unexpected age-depende
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24. Isolation and Characterization of Ultramicrobacteria from a Gulf Coast Estuary
Viable bacteria were recovered from estuarine waters passed through a 0.2-μm polycarbonate membrane filter. The recovery method included the use of a dilute nutrient broth for primary enrichment followed by conditioning of the organism to a dilute nutrient solid medium. These bacteria were gram-negative rods and coccobacilli having an NaCl requirement and,