Direct Filtration
Mostrando 25-36 de 234 artigos, teses e dissertações.
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25. The influence or coagulation pH and concentration of aluminum sulphate in the removal of Cryptosporidium oocysts by down flow direct filtration / Influência do ph de coagulação e dosagem de sulfato de alumínio na remoção de oocostos de cryptosporidium por filtração direta descendente
Algumas doenças de veiculação hídrica têm se destacado nas últimas décadas, dentre elas a criptosporidiose, causada pelo protozoário Cryptosporidium. Este protozoário vem se destacando pela elevada incidência de casos e devido às suas características de resistência aos processos convencionais de desinfecção com cloro e à capacidade de perman�
Publicado em: 2007
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26. Filmes finos de iodeto de chumbo como detector de raios-X para imagens médicas / Lead Iodide Thin Films as X-ray detectors for Medical Imaging
In the last few years, great interest has been focused to high atomic number and wide band gap semiconductor materials for applications in room temperature ionizing radiation detection using the direct detection method. Some materials such as PbI2, HgI2, TlBr, CdTe and CdZnTe are good photoconductors and can be used at room temperature. As a good candidate,
Publicado em: 2007
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27. Influence of apparent molecular size from aquatic humic substances in the coagulation efficiency with aluminium sulfate and ferric chloride / Influência do tamanho molecular aparente das substâncias húmicas aquáticas na eficiência da coagulação com sulfato de alumínio e cloreto férrico
Water sources used to supply the public water system frequently have a relatively high true color intensity due to dissolved aquatic humic substances (AHS). In this study, water samples were collected from the Itapanhaú River (Bertioga, SP, Brazil), which exhibited a true color intensity in the order of 300 Hanzen units. XAD-8 resin was used to extract AHS.
Publicado em: 2007
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28. Remoção de Oocistos de Cryptosporidium por filtração direta: Influência de alguns aspectos operacionais / Removal of Cryptosporidium Oocysts by direct filtration: the influence some operational aspects
The present work deal with the removal of Cryptosporidium oocysts by downflow direct filtration with almost uniform filter bed to verify the influence of operational aspects such as coagulant dosage, filtration flow rate and raw waters characteristcs. The experimental work was carried out in pilot-plant comprised by a hydraulic flash mixing device and a rapi
Publicado em: 2006
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29. Removal of cells and by-products of Microcystis spp. in double filtration, oxidation and adsorption processes / Remoção de células e subprodutos de Microcystis spp. por dupla filtração, oxidação e adsorção
Considerando o aumento da ocorrência de florações de cianobactérias e a possibilidade de formação de subprodutos em diversos mananciais destinados ao consumo humano, este trabalho teve como objetivo, avaliar a remoção de células e subprodutos de Microcystis spp. pelos processos de dupla filtração com filtração ascendente em pedregulho e de filtr
Publicado em: 2006
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30. Análise da influência da geoquímica do ambiente e das características do substrato na estruturação da população de Corbicula flumínea, MULLER 1974, (Mollusca, Bivalvia) no reservatório da usina elétrica de Volta Grande - MG/SP
Corbicula fluminea (Müller, 1774) is a very common fresh water bivalve specie in Asiatic continent. Nowadays can be found widespread distributed in Europe, North and South America. Considering their high reprodutive rate and spreading capacity of their juvenile plancton forms, this bivalve could be considered as a highly invading specie, being a dominant co
Publicado em: 2006
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31. Estudo da clarificação de agua natural com turbidez baixa e cor moderada utilizando a solução aquosa obtida com as sementes de Moringa oleifera como coagulante
The specie Moringa oleifera stands out as one of the most promising sources of natural coagulants and it is an alternative coagulant to use instead of aluminum salts and iron salts objectivizing to eliminate particles in suspension on water. The present project set out to comparative study of the fast mixture conditions and flocculation conditions (mean aver
Publicado em: 2005
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32. Remoção de células de Microcystis sp por pré-cloração, coagulação, filtração direta e pós-cloração em escala de bancada / Removal of cells of Microcystis sp by prechlorination, coagulation, direct filtration and poschlorination in jar-test experiment
Por suas características fisiológicas, cianobactérias se adaptam rapidamente em sistemas eutrofizados e geralmente predominam na comunidade fitoplanctônica. O crescimento excessivo desses microrganismos resulta em dificuldades e acréscimo nos custos do tratamento de água para consumo humano. Além da rápida colmatação dos filtros devido à grande ma
Publicado em: 2005
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33. OcorrÃncia de infecÃÃo filarial em portadores de hidrocele moradores de Ãrea endÃmica para bancroftose
It is generally accepted that testicular hydrocele is the most common clinical manifestation related to bancroftian filariasis. The aim of this cross-sectional study was to evaluate filarial active infection in 259 patients with hydrocele and inhabitants from a bancroftian filariasis endemic area between 1999 and 2000. The final diagnosis of hydrocele was ba
Publicado em: 2005
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34. Tratamento das águas de chuva escoadas sobre telhado e avaliação do seu uso
This research, qualitative and quantitative, is resulted of experiments for the treatment and quality of rain waters, flowed off on roofs, for domestic and industrial use. The choice of the subject is justified by the fact of the exploitation of the rain water to be an auxiliary resolution to the water scarcity, mainly in places where the lack of this resour
Publicado em: 2004
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35. Effect of intracerebroventricularly injected insulin on urinary sodium excretion by cerebroventricular streptozotocin-treated rats
Recent evidence suggests that insulin may influence many brain functions. It is known that intracerebroventricular (icv) injection of nondiabetogenic doses of streptozotocin (STZ) can damage insulin receptor signal transduction. In the present study, we examined the functional damage to the brain insulin receptors on central mechanisms regulating glomerular
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-09
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36. AvaliaÃÃo CinÃtica da Taxa de ReaÃÃo de DegradaÃÃo do Ãcido DicloroacÃtico via tecnologia de oxidaÃÃo avanÃada OzÃnio/UV: um estudo cinÃtico
With the current level of industrial activity the quantity of pollutants being rejected into the aquatic environment are constantly increasing. The removal of these products through conventional processes such adsorption, filtration, incineration or biological treatment is not always efficacious, since these methods are based on the simple transference of th
Publicado em: 2003