Absolute Permeability
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. EXPERIMENTAL EVALUATION OF TRANSPORT PARAMETERS IN SHALES / AVALIAÇÃO EXPERIMENTAL DOS PARÂMETROS DE TRANSPORTE EM FOLHELHOS
The majority of the problems related to wellbore stability occur when argillaceous rocks, such as shales, are drilled. Such problems are believed, in general, to be caused by the physical-chemical interaction between drilling fluids and the referred rocks. This dissertation focuses on the experimental study of the behavior of shales exposed to different sali
Publicado em: 2010
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2. A microcirculação da bolsa da bochecha do hamster sob a influência do diabetes mellitus experimental induzido por estreptozotocina: aspectos morfofuncionais / Microcirculation of hamster cheek pouch under the influence of exerimental diabetes mellitus induced by streptozocin morpho-functional aspects
Diabetes Mellitus is a chronic metabolic disease with multiple etiologic factors (genetic, viral and immunological) that results in absolute or relative insulin deficiency, causing persistent elevated blood glucose levels. Nowadays, Diabetes Mellitus is considered as an important health concern due to its increasing prevalence and high morbimortality. Its cl
Publicado em: 2009
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3. UtilizaÃÃo de mÃtodos de transferÃncia de escala na simulaÃÃo de recuperaÃÃo de hidrocarbonetos com aplicaÃÃo de computaÃÃo distribuÃda
A transferÃncia para uma escala maior (âupscalingâ), tem sido um mÃtodo muito utilizado no tratamento de informaÃÃes associadas a uma grande quantidade de dados, tornando-se uma opÃÃo ainda mais relevante quando o excesso destes dados representa uma dificuldade na sua manipulaÃÃo, levando à outras conseqÃÃncias tais como longo tempo de p
Publicado em: 2009
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4. Moisture effective diffusivity in porous solid mixtures / Difusividade efetiva de agua em misturas de solidos porosos
Porous solids have been applied in several industrial sectors, mainly as mixture of different solids. The physical characterization as well as the effective diffusivity of these materiaIs are important to the optimization of industrial processes that apply mass transport in porous solids. Investigations about effective diffusivity in solid mixture indicated
Publicado em: 2007
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5. Influencia da vibração na permeabilidade absoluta de meios porosos saturados com agua / Influence of the vibration on the absolute permeability of porous media satured with water
This work verifies experimentally the effects of the mechanical vibration on the absolute permeability of saturated porous media upon which a uniform flow is simultaneously imposed. After finding a driving range within which indirect effects of the vibration are excluded, such as those resulting from ultrasonic heating and mechanical disintegration of the ro
Publicado em: 2004
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6. Quantificação da influencia da composição de terpolimeros de polietilenotereftalato nas propriedades termicas, na morfologia e no comportamento de deformação, durante o sopro
PET terpolymers properties were never determined in a complete way. quantification of the relationship between the molecular weight and the comonomers content is practically inexistent. The objective of that study is, starting from 14 different PET terpolymer types, to quantify the thermal properties of stretching and the morphologic structure formed during
Publicado em: 2002
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7. Ritmo diario da secreção de insulina por ilhotas pancreaticas isoladas de rato : correlação com permeabilidades a potassio e calcio
This thesis examines the insulin secretion and the t<" and Ca2+ effluxes in pancreatic islets at different times of the day. Insulin secretion was measured during a 60 min incubation (37°C) of islets from fed or 48 h-starved rats. The t<" and Ca2+ effluxes were determined by measuring the rate of Rb + and Ca2+ efflux, respectively, from islets preloaded wit
Publicado em: 1998
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8. Modelagem estocastica de facies para caracterização da distribuição espacial das heterogeneidades de reservatorio
The genesis and properties of a depositionaI system can be understood by the use of facies modeIs, which permit the prediction of its spatial distribution and reservoir qualities. The qualitative approach associated to nurnerical data allows the quantification of flow units. The method presented herein is intended to translate geological data into nurnerical
Publicado em: 1992
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9. Analise critica dos metodos de mudança de escala associados a simulação de reservatorios
New geoestatistical techniques allow us to use a great number of information to model petroleum reservoirs. However, in order to bonor the variability of tbe modelled properties, tbe reservoir discretization requires a grid toa refined to be directly used in a flow simulator. Therefore, a cbange of scale is needed, from tbe geoestatistical grid to tbe flow s
Publicado em: 1991
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10. Vasopressin increases water permeability of kidney collecting duct by inducing translocation of aquaporin-CD water channels to plasma membrane.
Water excretion by the kidney is regulated by the peptide hormone vasopressin. Vasopressin increases the water permeability of the renal collecting duct cells, allowing more water to be reabsorbed from collecting duct urine to blood. Despite long-standing interest in this process, the mechanism of the water permeability increase has remained undetermined. Re
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11. Amino acid transport and cell volume regulation in Ehrlich ascites tumour cells.
Cellular and extracellular concentrations of amino acids were measured in Ehrlich ascites cells by amino acid analysis and by distribution of radioactive amino acids between cells and medium. Dilution of the medium results in a reduction in the cellular concentration of non-essential amino acids and taurine and an equivalent increase in the extracellular con
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12. Relative ion permeability of normal and cystic fibrosis nasal epithelium.
The raised transepithelial electric potential difference (PD) across respiratory epithelia in cystic fibrosis (CF) has suggested an abnormality in ion permeation. We characterized this abnormality further by measuring in the nasal epithelia of CF and normal subjects the concentration-PD relationship for amiloride, an inhibitor of cell Na+ permeability, and P