Impermeable Barriers
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Influence of the bentonita content on the hydraulic conductivity and shear strength of sandy-soil used for liners / Influência do teor de bentonita na condutividade hidráulica e na resistência ao cisalhamento de um solo arenoso utilizado como barreira impermeabilizante
A utilização de solo natural misturado com bentonita empregado em camadas impermeáveis para retenção de contaminante é bastante comum em aterros sanitários. Neste trabalho, serão apresentados os resultados de ensaios com misturas de solo-bentonita nos teores de 3%, 5% e 7%, utilizando-se um solo arenoso proveniente da região de Pindorama (SP). Os en
Publicado em: 2007
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2. Uma modelagem geologica para caracterizar avanço de agua em um reservatorio turbiditico
It s well know that oil reservoir, with strong water drive, shows high recovery efficiency, but when water-oil ratio production increases rapidly, the ultimate oi! production decreases. The main purpose of this research is to define a geological model for such an oil reservoir, in an appropriate scale, induding heterogeneities, which explains the reservoir p
Publicado em: 1993
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3. Local control of neurite development by nerve growth factor
A three-chamber culture system was devised in which neurites growing from small clusters of somas of sympathetic neurons penetrated a virtually fluid-impermeable barrier; thus the local fluid environment of the distal portions of the neurites could be controlled independently of the local fluid environment of the somas and proximal portions of the neurites.
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4. Human Neuroepithelial Cells Express NMDA Receptors
L-glutamate, an excitatory neurotransmitter, binds to both ionotropic and metabotropic glutamate receptors. In certain parts of the brain the BBB contains two normally impermeable barriers: 1) cerebral endothelial barrier and 2) cerebral epithelial barrier. Human cerebral endothelial cells express NMDA receptors; however, to date, human cerebral epithelial c
BioMed Central.
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5. Infection of Actinomycin-Permeable Mutants of Escherichia coli with Urea-Disrupted Bacteriophage
Intact cells of actinomycin-permeable mutants of Escherichia coli could be infected with urea-disrupted phage T4 (designated as T4π). The parental strains and the revertants, which are impermeable to actinomycin, were not susceptible to T4π unless they had been treated with agents which altered their permeability. The permeable mutants developed competence
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6. Macromolecular permeability across the blood-nerve and blood-brain barriers.
The permeability of insulin (Ins), nerve growth factor (NGF), albumin (Alb), transferrin (Trf), and IgG across the blood-nerve barrier (BNB) and blood-brain barrier (BBB) in normal adult rats was quantified by measuring the (permeability coefficient x surface area) product (PS) with the i.v. bolus-injection technique in the cannulated brachial vein and arter