نتایج جستجو برای: linear relationships between permeability

تعداد نتایج: 3304594  

Journal: :Investigative ophthalmology & visual science 1999
Y Feng V J Venema R C Venema N Tsai M A Behzadian R B Caldwell

PURPOSE To determine the cellular route by which vascular endothelial cell growth factor (VEGF) increases the permeability of cultured retinal endothelial cells and to test whether nitric oxide (NO) production by NO synthase (NOS) is involved in signaling VEGF's permeability enhancing effects. METHODS Cultured bovine retinal microvascular endothelial (BRE) cells were used for bioassay of perm...

1997
Graham H. Galbraith Craig McLean Jiansong Guo

The physics of moisture transfer is complex and as a result modelling is normally carried out on a macroscopic basis, with empirical coefficients used to simulate the transport process. These coefficients are not single values but depend on the moisture content of the material. The application of this data within the simulation environment requires the determination of a systematic methodology ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1375

chapter two presents three m-admissible function algebras ab, bd, and sl, to construct the universal abelian, band, and semilattice compactifications, respectively. the main results are (11.3), (12.3), and (12.4). some inclusion relationships between these function algebras and the other well-known ones, presented in section 8, are made via the devico of compactifications. chpter three is about...

Journal: :The Journal of pharmacology and experimental therapeutics 1999
K Palm K Luthman J Ros J Grasjo P Artursson

The aim of this study was to investigate the effect of ionization on drug transport across the intestinal epithelium in order to include this effect in structure-absorption relationships. The pH-dependent permeation of one rapidly (alfentanil) and one slowly (cimetidine) transported basic model drug across Caco-2 cell monolayers was investigated. Both drugs had pK(a)values in the physiological ...

Journal: :Mathematical Methods in the Applied Sciences 2015

2016
Rainer Senger Enrique Romero Paul Marschall

The characterization of gas migration through low-permeability clay formations has been a focus of R&D programs for radioactive waste disposal, which is also of great importance for shale-gas exploration, and cap-rock behavior of hydrocarbon reservoirs and CO2 sequestration. Laboratory tests on Opalinus clay cores from a shallow borehole in the Mont Terri Underground Research Laboratory (URL) a...

2004
Ira O. Ojala Bryne T. Ngwenya Ian G. Main

[1] Mechanical properties of rocks are characterized by their notable dependence on the applied deformation rate. However, little is known about the strain rate dependence of fluid flow properties since most laboratory tests are conducted using a single, high strain rate. We have investigated the effect of loading rate on the permeability of porous sandstones by carrying out triaxial compressio...

Journal: :Geomechanics and geophysics for geo-energy and geo-resources 2021

Friction-permeability response of rock fractures is a fundamental issue in developing geo-energy extraction and storage. This review aims to summarize promote our understanding friction-permeability relationships for inspire us create robust solutions engineering puzzles. From perspective laboratory experiments, we the common methods provide state-of-the-art discussions on frictional instabilit...

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