Reactive Barriers
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Comportamento hidráulico e reativo de uma mistura solo-cimento para aplicação em barreiras de contenção de resíduos ácidos contendo chumbo e cádmio
O presente trabalho avaliou o comportamento hidráulico e reativo de um solo argiloso compactado na energia proctor modificada, com adição de cimento Portland, para fins de aplicação em barreiras impermeáveis de fundo em aterros de resíduos sólidos industriais e de mineração, quando submetido à ação de carga estática de resíduos e em contato co
Publicado em: 2011
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2. Ressonadores de microdiscos com região ativa nanoestruturada bombeados por injeção eletrônica / Microdisk resonators with nanostructured active region pumped by electronic injection
This doctorate¿s thesis presents the growth of InAs quantum dots directly on high bandgap InGaAsP (?g=1420 nm) barriers to be used as the active region of microdisk resonators with emission in the C-band (1520¿1570 nm). Based on photoluminescence and atomic force microscopy experiments, the occurrence of inter-diffusion on the InAs/InGaAsP interface is cal
Publicado em: 2010
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3. Estudo da eficiência e aplicabilidade de carvão ativado resultante de pirólise de casca de arroz em barreiras reativas na remoção de contaminantes em solos
A contaminação do solo com resíduos tóxicos tornou-se um dos maiores problemas ambientais. Na maioria das vezes, as condições do local incluem a contaminação da água subterrânea. Neste contexto, os metais pesados têm sido motivo de preocupação, destacando-se o cromo hexavalente como poluente de elevada toxicidade e mobilidade. Quando um problema
Publicado em: 2010
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4. Serviços ancilares através da geração distribuíba : reserva de potência ativa e suporte de reativos / Ancillary services provide by distributed generation : active power reserves and reactive support
In order to set the principles for a future regulatory framework in Brazil which involves the participation of distributed generation (DG) to provide ancillary services; this work presents an analysis developed in three broad areas, technical, economic and regulatory. A specific objective of the project is to make an analysis of the use of the DG for the sup
Publicado em: 2009
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5. Potencial adsortivo para metais de Carvões minerais do Rio Grande do Sul
Barreiras reativas têm sido confeccionadas com diversos tipos de materiais adsorventes, normalmente custosos. O carvão mineral em granulometria adequada, no entanto, pode tornar-se uma importante opção a baixo custo na fabricação de barreiras geoquímicas permeáveis (BGPs) para remediação de áreas contaminadas por metais. No Rio Grande do Sul foram
Publicado em: 2009
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6. AvaliaÃÃo fÃsico-quÃmica da remediaÃÃo de solos contaminados por BTEX
This research had as objective to evaluate the efficiency of the reactive means in the removal of aromatical hydrocarbons BTEX (Benzene, Toluene, Etil Benzene and Xylenes) in the ground, coming of leak of gasoline, either in fuel stations or underground tanks, and to explain the physico-chemical mechanisms that occuring on the system. The experiment was carr
Publicado em: 2006
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7. USO DE BARRERAS REACTIVAS EN EL TRATAMIENTO DE AQUÍFEROS CONTAMINADOS / USO DE BARREIRAS REATIVAS NA REMEDIAÇÃO DE AQUÍFEROS CONTAMINADOS / USE OF REACTIVE BARRIERS FOR REMEDIATION OF GROUNDWATER CONTAMINATION
A contaminação do meio ambiente de subsuperfície com resíduos perigosos e tóxicos tem se tornado um dos maiores problemas ambientais em vários países, com muitos locais apresentando contaminação da água subterrânea. Existem diversas técnicas de controle de contaminação da água subterrânea, sendo que a mais comumente utilizada é a de pump-and
Publicado em: 1999
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8. Crystal structure of a bifunctional aldolase–dehydrogenase: Sequestering a reactive and volatile intermediate
The crystal structure of the bifunctional enzyme 4-hydroxy-2-ketovalerate aldolase (DmpG)/acylating acetaldehyde dehydrogenase (DmpF), which is involved in the bacterial degradation of toxic aromatic compounds, has been determined by multiwavelength anomalous dispersion (MAD) techniques and refined to 1.7-Å resolution. Structures of the two polypeptides
National Academy of Sciences.
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9. Bench-to-bedside review: Burn-induced cerebral inflammation – a neglected entity?
Severe burn injury remains a major burden on patients and healthcare systems. Following severe burns, the injured tissues mount a local inflammatory response aiming to restore homeostasis. With excessive burn load, the immune response becomes disproportionate and patients may develop an overshooting systemic inflammatory response, compromising multiple physi
BioMed Central.
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10. Intestinal mucus gel and secretory antibody are barriers to Campylobacter jejuni adherence to INT 407 cells.
An in vitro mucus assay was developed to study the role of mucus gel and secretory immunoglobulin A (sIgA) in preventing attachment of Campylobacter jejuni to INT 407 cells. An overlay of rabbit small intestinal mucus was found to impede the attachment of C. jejuni to a monolayer of INT 407 cells. Mucus from rabbits previously colonized with C. jejuni was fo
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11. Analysis of T cell responses in liver allograft recipients. Evidence for deletion of donor-specific cytotoxic T cells in the peripheral circulation.
Analysis of cell-mediated lympholysis in long-term liver allograft recipients indicated that there was a donor-specific unresponsiveness that could not be reversed by the addition of rIL-2 and/or mixed lymphocyte culture supernatant or by nonspecific stimulation of the cultures with PHA. Stimulation of recipient cells with semisyngeneic cells having both don
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12. Interspecies antigenic determinants of the reverse transcriptases and p30 proteins of mammalian type C viruses.
The major internal structural proteins (p30) of type C viruses isolated from several mammalian species were studied by radioimmunoprecipitation and competitive radioimmunoassays. Three antigenically distinguishable sets of interspecies determinants could be demonstrated by both methods. One set of determinants shared by viruses of rodent origin (mouse and ra