Particles Filters
Mostrando 13-24 de 60 artigos, teses e dissertações.
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13. Exposição aguda ao material particulado total em suspensão proveniente de diferentes fontes e suas repercussões nas respostas inflamatórias, sistêmica e local, em ratos / Acute exposure to total suspended particles from different sources and their impacts on both systemic and local inflammatory responses in rats
Background: Air pollution is associated with both increased morbidity and mortality. These associations persist even at lower concentrations and shortterm exposure. Objectives: To assess the impact of the components of three different sources of Total Suspended Particles (TSP) on local and systemic inflammatory responses in healthy rats. Methods: TSP from au
Publicado em: 2007
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14. INDUSTRIAL FILTER BAG CHEMICAL RECICLING / Reciclagem química de PET proveniente de filtros industriais pós-consumo
The PET filter bag is used in the separation of the particulates materials of the gas produced in the aluminum industry. It had been submitted a chemical recycling. Almost industries make the disposal of these materials in industrial earthwork or still they take the centers that make the energy recycling. The filter bag restrained particulate is constituted
Publicado em: 2006
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15. Monte Carlo methods in nonlinear filtering theory.
This thesis is focused on two basic aspects of the Control Problem: the stochastic modelling of physical systems, and Monte Carlo-based numerical approximation of the nonlinear filtering problem solution. In the first topic this thesis concerns about clarifying some issues in the mathematical modeling of continuous-time systems with Brownian motion. The hypo
Publicado em: 2006
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16. Statistical methods for blind equalization of communication channels. / Métodos estatísticos para equalização de canais de comunicação.
Nesta tese analisamos e propomos métodos para a equalização não-treinada (cega) de canais de comunicação lineares FIR baseados em filtros de partículas, que são técnicas recursivas para a solução Bayesiana de problemas de filtragem estocástica. Iniciamos propondo novos métodos para equalização sob ruído gaussiano que prescindem do uso de codi
Publicado em: 2006
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17. Construction and evaluation of hydrocyclone for pre-filtering irrigation water. / Construção e avaliação de hidrociclone para pré-filtragem da água de irrigação.
Good water quality is uppermost in irrigated agriculture for the perfect functioning of irrigation systems and their components. The use of water containing suspended sediments has caused serious problems to irrigation systems, reducing the useful life of their components, clogging pipes and emitters, consequently causing non-uniform irrigations and low effi
Publicado em: 2003
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18. Cladonia verticillaris (lÃquen) como biomonitor padrÃo da qualidade do ar no distrito de JaboatÃo-PE
Liquens are recognized as environmental bioindicators and biomonitors of air quality. In this research the District of JaboatÃo, Metropolitan Meso-region of Recife (MMR), Pernambuco, Brazil was selected for evaluating the air quality in that area, correlating data obtained from the biological monitors â liquens, with the results obtained in the stations of
Publicado em: 2002
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19. Obtenção e caracterização de filtros de profundidade de crisotilas brasileiras
Chrysotile asbestos has been used in the manufacture of deep filtration filters since longo, owing to its high specific surface area and its positive surface charge. However, as in the case of other natural materials, the performance of the filters depends very strongly on the chrysotile origin. Filters obtained from brazilian asbestos have considerabily poo
Publicado em: 1989
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20. Adherence of bacteria, yeast, blood cells, and latex spheres to large-porosity membrane filters.
Strong adherence of bacteria, yeast, erythrocytes, leukocytes, platelets, spores, and polystyrene spheres to membrane filter materials was noted during filtration through membranes with pore size diameters much larger than the particles themselves. Quantitative recovery on the membrane filters of these particles from low-concentration suspensions was achieve
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21. Comparative Poliovirus Permeability of Silver, Polycarbonate, and Cellulose Membrane Filters
Three types of filters, silver, polycarbonate, and cellulose, were evaluated for permeability toward poliovirus suspended in water, salt-containing, and proteinaceous solvents. The ability of virus to pass through cellulose filters depended on the suspending medium; virus did not pass through cellulose filters in either water or salt solution, whereas the us
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22. Capture of latex beads, bacteria, endotoxin, and viruses by charge-modified filters.
This report demonstrates how electropositive filters can be used to enhance the removal of microorganisms and other negatively charged particles from water. It was shown that electropositive depth filters were capable of adsorbing viruses and endotoxins many times smaller than the average pore size of the filter. Electronegative filters of similar porosity o
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23. Trichothecene mycotoxins in aerosolized conidia of Stachybotrys atra.
Stachybotrys atra is the etiologic agent of stachybotryotoxicosis, and this fungus and its trichothecene mycotoxins were recently implicated in an outbreak of unexplained illness in homes. S. atra was grown on sterile rice, autoclaved, dried, and then aerosolized by acoustic vibration. The distribution of particles (mass and number) was monitored on an aerod
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24. Passage of Treponema pallidum Through Membrane Filters of Various Pore Sizes
The passage of Treponema pallidum through commercially available Millipore membrane filters of various pore sizes was examined. No microscopically detectable organisms passed through a filter with a pore diameter of 0.22 μm. As pore size was increased, progressively more organisms passed through. Motile organisms passed through filters to a greater extent t