Polymeric Filters
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Classification of polymers insulators hydrophobicity basead on digital image processing
Although the hydrophobicity is usually an arduous parameter to be determined in the field, it has been pointed out as a good option to monitor aging of polymeric outdoor insulators. Concerning this purpose, digital image processing of photos taken from wet insulators has been the main technique nowadays. However, important challenges on this technique still
Materials Research. Publicado em: 27/03/2012
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2. Considerações sobre o preparo de amostras contendo micropoluentes estrogênicos
In this work, the materials used in the recovery of estrogens from aqueous matrices by filtration and solid phase extraction were evaluated. The results showed that glass-fiber filters allow a recovery and repeatability compatible with this type of analysis, whereas cellulose esters lead to significant losses of the analytes, mainly due to adsorption process
Química Nova. Publicado em: 2012
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3. Formação de biofilmes microbianos em membranas poliméricas de poliamida e polietersulfona e seu controle por agentes sanitizantes / Microbial biofilms formation in polymeric membranes of polyamide and polyethersulfone and its control by sanitizers agents
O grande consumo de águas minerais tem alavancado muitos estudos de relação caracterização microbiológica, nas mais diversas regiões brasileiras. Trabalhos revelam que a grande maioria das águas brasileiras envasadas e águas de poços artesianos possuem contaminação microbiana, causando grande preocupação com relação à qualidade da água a se
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/11/2011
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4. Efeito de substâncias empregadas para remoção de cobre sobre o teor de compostos secundários da cachaça
High copper content is of great concern among producers of sugar-cane spirits who frequently use filters instead of cleaning the stills. This study compared the efficiency of activated carbon, ion-exchange-polymeric resin, and activated-carbon/iron-oxide magnetic composite for copper reduction without removing excessive organic compounds that are important f
Química Nova. Publicado em: 2009
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5. Caracterização de cerâmicas porosas de alumina reforçada com zircônia produzidas pelo método da réplica
Porous ceramics have many applications: thermal insulation, catalytic support, materials to fire protection, filters, and others. There are many techniques to production of ceramic filters. One technique to obtain ceramic filters is the replication method. This method consists in the impregnation of polymeric foam with ceramic slurry followed by a heating tr
Publicado em: 2008
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6. Desenvolvimento e estudo de um reator UASB com unidade de filtração, utilizado para o tratamento de esgoto sanitário / Development and study of a UASB reactor coupled with a filtration unit for the treatment of domestic sewage
An anaerobic reactor (UASB Upflow Anaerobic Sludge Blanket) coupled to a filtration unit for the treatment of domestic sewage was developed and studied. The study began by operating the UASB reactor for 642 days, during which time the influent and effluent liquid phase were monitored. The filtration unit was then coupled to the UASB reactor and the filtra
Publicado em: 2006
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7. Oligomeric and polymeric aggregates formed by proteins containing expanded polyglutamine
Neurological diseases resulting from proteins containing expanded polyglutamine (polyQ) are characteristically associated with insoluble neuronal inclusions, usually intranuclear, and neuronal death. We describe here oligomeric and polymeric aggregates formed in cells by expanded polyQ. These aggregates are not dissociated by concentrated formic acid, an ext
The National Academy of Sciences.
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8. Occurrence of Cytophagas in Sewage Plants
With the application of plate count methods and of the KOH-flexirubin test, bacteria belonging to the Cytophaga group were proved to occur regularly in samples from biological sewage treatment facilities. Generally, the percentage of Cytophaga colonies of the total heterotrophic colonies was lowest in the inflow sewage water as compared with the values found
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9. Concentration of viruses and dissolved DNA from aquatic environments by vortex flow filtration.
Vortex flow filtration (VFF) was used to concentrate viruses and dissolved DNA from freshwater and seawater samples taken in Florida, the Gulf of Mexico, and the Bahamas Bank. Recoveries of T2 phage and calf thymus DNA added to artificial seawater and concentrated by VFF were 72.8 and 80%, respectively. Virus concentrations determined by transmission electro