Hydraulic Barrier
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Efecto de la adición de bentonita sobre las propiedades ópticas de diferentes materiales compuestos poliméricos
ABSTRACT In this work, composite materials were obtained by the incorporation of bentonite to biodegradable and synthetic polymeric matrices. Commercial (BE) and natural (BM) bentonite samples were employed, as well as three different polymeric matrices: thermoplastic corn starch (TPS), high density polyethylene (HDPE) and a poly(styrene-b-butadiene-b-styren
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Methodology for the Design of Cover Systems Based on the Case Study Conducted at Site Rio Paracatu Mineração (RPM) in Paracatu, Minas Gerais / Metodologia para Dimensionamento de Sistemas de Cobertura com Base em Estudo de Caso Realizado na Mina da Empresa Rio Paracatu Mineração (RPM) em Paracatu, Minas Gerais
Nearly four years ago, two experimental cover systems of the evapotranspirative type, have been designed and built in Rio Paracatu Mineração (RPM), Paracatu, Minas Gerais (Amorim, 2008). One cover system was made with a hydraulic barrier layer and the other with a capillary barrier layer, both with monitoring systems consisting of a runoff meter, lysimeter
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/01/2011
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3. EFFECT OF THE COMPACTION METHOD ON THE PERMEABILITY OF AN ORGANIC COMPOUND-COLLUVIONAR SOIL MIXTURE / INFLUÊNCIA DO MÉTODO DE COMPACTAÇÃO NA PERMEABILIDADE DE UMA MISTURA COLÚVIO-COMPOSTO ORGÂNICO
The liner is one of the most important elements in a sanitary landfill project, since it works as a barrier capable to impede seepage of pollutant substances through the subsurface. This element is usually built with materials that have low permeability. The choice of the right material as well as the control and supervision of the constructive processes are
Publicado em: 2007
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4. "Morfologia e sedimentologia ao longo do sistema praia-duna frontal de Ilha Comprida, SP" / "Morphology and sedimentology along the beach-foredune system of Ilha Comprida, SP".
Ilha Comprida is a Holocene sandy barrier-island located on the south coast of São Paulo State, 63 km long and 2 to 5 km wide. Its transverse boundaries are Cananéia and Icapara inlets, at the SW and NE, respectively. The beach-foredune system of Ilha Comprida have experienced intense morphological variation in time, as showed by the successive truncations
Publicado em: 2006
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5. O impacto de uma lagoa receptora de efluentes industriais contendo boro em um aqüífero raso / Groundwater impact caused by an industrial effluente lagoon with boron
The boron (B) occurs naturally at low concentrations in surface and ground waters used to human supply and irrigation. Although concentration >1mg/L can cause health and environmental problems, detailed studies on transport and fate of B in aquifers are restricted in Brazil. This study investigated the impacts on groundwater quality caused by an industrial (
Publicado em: 2006
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6. Processamento e interpretação de dados 2D e 3D de GPR :aplicações no imageamento de feições kársticas e estruturas de dissolução no campo de petróleo de Fazenda Belém-CE
In Fazenda Belém oil field (Potiguar Basin, Ceará State, Brazil) occur frequently sinkholes and sudden terrain collapses associated to an unconsolidated sedimentary cap covering the Jandaíra karst. This research was carried out in order to understand the mechanisms of generation of these collapses. The main tool used was Ground Penetrating Radar (GPR). Th
Publicado em: 2006
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7. Electrical parameters and water permeability properties of monolayers formed by T84 cells cultured on permeable supports
T84 is an established cell line expressing an enterocyte phenotype whose permeability properties have been widely explored. Osmotic permeability (P OSM), hydraulic permeability (P HYDR) and transport-associated net water fluxes (J W-transp), as well as short-circuit current (I SC), transepithelial resistance (R T), and potential difference (deltaV T) were me
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-01
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8. Hydraulic conductivity of low permeability materials: development, construction and test of a measurement system / Condutividade hidráulica de materiais de baixa permeabilidade: desenvolvimento, construção e teste de um sistema de medida
Este trabalho trata do desenvolvimento, montagem e teste de equipamentos para ensaios de materiais de baixa condutividade hidráulica, o qual inclui sistemas de controle hidráulico de volume constante, permeâmetros do tipo parede flexível e interfaces água-percolante. A vantagem desse arranjo está no maior controle dos ensaios e, notadamente, na reduç�
Publicado em: 2003
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9. Glomerular permeability barrier in the rat. Functional assessment by in vitro methods.
The formation of glomerular ultrafiltrate is dependent on the prevailing hemodynamic forces within the glomerular microcirculation and the intrinsic properties of the filtration barrier. However, direct assessment of the permeability barrier is difficult with most available techniques. We used confocal microscopy to image 1-micron thick optical cross-section
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10. Hyperosmolarity enhances the lung capillary barrier
Although capillary barrier deterioration underlies major inflammatory lung pathology, barrier-enhancing strategies are not available. To consider hyperosmolar therapy as a possible strategy, we gave 15-minute infusions of hyperosmolar sucrose in lung venular capillaries imaged in real time. Surprisingly, this treatment enhanced the capillary barrier, as indi
American Society for Clinical Investigation.
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11. Effect of fluid pressure on the hydraulic conductance of interstitium and fenestrated endothelium in the rabbit knee.
A synovial cavity is separated from plasma by synovial intima in series with capillary endothelium. Because 20% of the intimal surface is bare interstitium, the system is a convenient model for the study of passive transport through serial endothelial and interstitial layers. Here hydraulic flow across the composite barrier was investigated in forty-seven kn
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12. Osmotic flows across the blood-joint barrier.
The effective osmotic pressure across the blood-joint barrier is a key factor controlling synovial fluid volume and joint effusions. The effect of plasma colloid osmotic pressure (COP) on trans-synovial flow was studied directly in rabbit knees expanded by intra-articular fluid infusion. The synovial microcirculation was perfused with blood of varying COP. A