Browsing by Subject "Metais"
Now showing items 1-13 of 13
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Avaliação da digestão de amostras de piche assistida por radiação microondas e determinação de metais por ICP OES
This work reports the development of analytical methodologies for the determination of metals in samples of pitch after their digestion employing different strategies based on microwave radiation. The digestion process was ... -
Avaliação da relação entre indicadores microbiológicos de toxicidade e a biodisponibilidade de metais em um ecossistema costeira (Baía de Sepetiba-RJ)
| Posted on: 25 fev. 2011The possible relations between metal bioavailable forms and microbiological indicartors of toxicity are currently poorly understood. This study aims to evaluate the relationship between geochemical and microbiological ... -
Biodisponibilidade e toxicidade de contaminantes em sedimentos na porção nordeste da Baía de Todos os Santos
| Posted on: 16 fev. 2009The purpose of this study the quality of the sediment surface of the northeast portion of the Todos os Santos Bay through the application of the sediment quality triad. For samples that were collected from surface sediment ... -
BIOGEOQUÍMICA DE METAIS NA CADEIA TRÓFICA PELÁGICA DA ÁREA DE RESSURGÊNCIA DE CABO FRIO SUDESTE DO BRASIL
| Posted on: 20 abr. 2011The coastal regions of the world are subject to the phenomenon of upwelling constituting areas of high biological productivity. Even though upwelling areas represent a small percentage of the total surface of the oceans, ... -
Caracterização físico-química e avaliação in vitro de hidroxiapatitas substituídas com 5% e 1% de metais
| Posted on: 17 dez. 2009This work intended to evaluate the physical-chemical properties and in vitro of apatites modified by the incorporation of different metals. They were produced by the wet via and powders not sinterized of hydroxyapatite ... -
Comparação da contaminação por metais no setor interno e externo da Baía de Guanabara utilizando Bunodosoma caissarum e Perna perna como espécies bioindicadoras
| Posted on: 18 fev. 2011Bioindicators are able to indicate the environmental quality of the ecosystems in which they live as well as provide information on the bioavailability of contaminants. Biomonitor organisms can be used to understand the ... -
Cronologia da deposição de elementos-traço nas Baías de Sepetiba e Ilha Grande (RJ)
| Posted on: 05 jul. 2005Because of industrial development in costal regions, areas not impacted, such as Ilha Grande, became important for studding metals. Due to the lack of studies in this type of area, comparing them with impacted areas is ... -
Extração e pré-concentração no ponto nuvem para a determinação de metais em águas salinas por espectrometria de emissão ótica com fonte de plasma indutivamente acoplado
| Posted on: 01 jul. 2005This work presents the development of analytical methodologies for the simultaneous determination of cadmium, lead, copper and nickel in saline waters by inductively coupled plasma optical emission spectrometry, using ...