Dissolved Inorganic Phosphate
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Enhanced solubilization of iron and calcium phosphates by Aspergillus niger by the addition of alcohols
The present study deals with the effect of increased concentrations of alcohols (methanol and ethanol) on the solubilization of FePO4 and CaHPO4 by Aspergillus niger. The efficiency of solubilization (ES) of inorganic phosphates, fungal growth, acid production and pH variation were determined. The concentrations of alcohols that most favored the solubilizati
Braz. arch. biol. technol.. Publicado em: 2013-04
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2. 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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3. Solubilisation of inorganic phosphates by inoculant strains from tropical legumes
Microbial solubilisation of low soluble inorganic phosphates is an important process contributing for the phosphorus available to plants in tropical soils. This study evaluates the ability of inoculant strains for tropical legumes to solubilise inorganic phosphates of low solubility that are found in tropical soils. Seven strains of Leguminosae nodulating ba
Scientia Agricola. Publicado em: 2011-10
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4. Aplicabilidade de reações de Fenton e foto-Fenton no tratamento de glifosato comercial
No presente trabalho, as reações de Fenton térmica e fotoquímica foram adotadas para a fotodegradação do glifosato comercial. Além disso, foi proposta a adição simultânea de íons Fe2+/Fe3+ e oxalato de potássio para potencializá-las. Em escala de bancada, empregando 4 L de solução contendo glifosato, foram avaliados parâmetros, sendo eles, a
Publicado em: 2011
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5. Estrutura organizacional do fitoplâncton nos sistemas lóticos e lênticos da bacia do Tietê-Jacaré (UGRHi-Tietê-Jacaré) em relação à qualidade da água e estado trófico
The aim of this work was to study the phytoplankton structure of lentic and lotic systems of Tietê/Jacaré basin located in São Paulo State and the relationship between the composition and dominance of phytoplankton organisms with the water quality and trophic state of the rivers and lakes of this basin. The Tietê/Jacare basin is composed by three main ri
Publicado em: 2009
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6. Qualidade da água e distribuição espacial de foraminíferos bentônicos em estuários das Baías Norte e Sul da Ilha de Santa Catarina (Brasil)
Watersheds with different characteristics lead to different rates of biogeochemical elements that contribute in estuarine systems. Thus, this study investigated the contribution of drainage on the nutrients as well as the responses of benthic foraminifera, with focus on estuarine region of six major systems that discharge in the North and South bays of Santa
Publicado em: 2009
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7. Estudo das diferentes formas de fósforo nas águas da plataforma continental do Amazonas
Hydrological samples were collected on the continental shelf of the Amazon river to determine particulate organic and inorganic matter, dissolved organic phosphorus (DOP), phosphate, total particulate phosphorus (TPP), chlorophyll a, temperature, salinity, pH, water transparency, dissolved oxygen (DO) and saturation rate. The objective was to study the forms
Química Nova. Publicado em: 2007-06
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8. A utilizaÃÃo da microalga skeletonema costatum (greville) cleve (bacillariophyceae) na avaliaÃÃo da qualidade ambiental de Ãreas estuarinas de Pernambuco
Coastal environments are characterized by the high complexity and biological diversity, where the variety overcomes others ecosystems. The estuaries represent one of the most productive ecosystems of the world, due to the great contribution of inorganic dissolved nutritients, coming from the continent. It has been changing in the last years, as a result of a
Publicado em: 2007
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9. Fatores que influenciam na produtividade dos oceanos: a importÃncia do fluxo de difusÃo dos nutrientes para a biomassa do fitoplÃncton na regiÃo oceÃnica do nordeste brasileiro
In the tropical oceanic region the phytoplankton primary biomass is controlled by light availability and inorganic dissolved nutrients, besides other physical factors as turbulence and sedimentation. The water properties in the photic zone are subjected by a number of different forcing intensities opposite to the deeper waters which varies regularly. In Nort
Publicado em: 2003
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10. In situ monitoring and biogeochemical cycling of nutrients in estuarine waters
This thesis describes the use of in situ and laboratory techniques for monitoring nitrate, phosphate and master variables in the environment. Chapter One presents a general overview of nutrients, how they are essential for aquatic biota, their general characteristics and the importance of their behaviour in estuaries. Commonly used analytical methods for nut
Publicado em: 2002
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11. General Model of Microbial Growth and Decomposition in Aquatic Ecosystems
A model capable of simulating freely suspended and attached decomposers, particulate organic matter, labile and refractory dissolved organic matter, inorganic nitrogen, and phosphate in the open-water portion of lakes is presented. Examples are given showing the utility of the model when coupled to the whole-ecosystem model CLEANER.
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12. Release of Bacterial DNA by Marine Nanoflagellates, an Intermediate Step in Phosphorus Regeneration
The concentrations of dissolved DNA and nanoflagellates were found to covary during a study of diel dynamics of the microbial food web in the Adriatic Sea. This observation was further investigated in a continuous seawater culture when nanoflagellates were fed bacteria grown in filtered seawater. Analysis of dissolved organic phosphorus and dissolved DNA sho