Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 2329 for “"permeability"”.
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Railway ballast permeability
… within the railway ballast and rock fill dam permeability areas are first reviewed and compared from which it was learned that the rock fill dam studies have known of non-Darcy flow in large aggregates while the railway ballast permeability studies have not. Constant head permeability tests …
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Research about low permeability measurement
… is challenging because of the low porosity and permeability. It is imperative to investigate permeability of the shale formations in order to better understand the performance of wells that are producing hydrocarbons from shale. Permeability is also one of key parameters in modeling fluids flow …
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Ionic Control of Porin Permeability
… Thus, this thesis focuses on understanding porin permeability regulation in live bacteria, employing Escherichia coli as a model organism. Firstly, using a flow cytometric method that I developed, I showed that the uptake of a fluorescent glucose analogue, and other porin-dependent compounds, was …
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The hydrodynamic permeability of sclera
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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Permeability anisotropy of resedimented mudrocks
Permeability anisotropy (ratio of horizontal to vertical permeability) is an important but uncertain parameter used in characterizing underground formations. While it is a fairly unknown parameter, it is integral for the petroleum industry, where a greater permeability anisotropy understanding can …
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Permeability measurements of compressible, porous media
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1982.
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The permeability of cellophane to microorganisms
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Biology and Public Health, 1931.
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Longitudinal air permeability of lodgepole pine
… that the mean ratio of sapwood to heartwood permeability was ca. 10:1 for both varieties. The mean ratio of var. latifolia to murrayana was 1.5:5 and 1.75:5 for sapwood and heartwood, respectively. The most important source of variation following the difference between heartwood and sapwood …
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Management of contaminants in low permeability media
To view the abstract, please see the full text of the document.
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Glycerol permeability in two species of Peromyscus
… Jacobs, et al. discussed differences in the permeability of the erythrocytes of rat and mouse to erythritol, mannitol, glycerol, and thiourea. Rat erythrocytes were more permeable to glycerol than to thiourea, whereas the reverse was true for mouse erythrocytes. Mouse erythrocytes also …
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The effect of fracture orientation on permeability
… as 10 k psi into rocks to fracture them, and permeability is optimised by inducing complicated fractures into the shale. Previous authors have studied fracturing orientation techniques, however, their work considered only simple fractures. In this work, complicated fractures were considered …
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SELECTION OF APTAMERS FOR INTESTINAL PERMEABILITY TEST.
… goal of developing biosensors for the intestinal permeability test. Design strategy for such aptamer-based biosensors is also proposed.
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Surface tension: permeability, the body, and installation
Surface Tension – Permeability, the Body, and Installation, is comprised of a multimedia installation and an accompanying minor thesis. The concurrent points of departure for both are the body and the medium of installation itself, exploring their sympathies with the lens of permeability. The …
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Understanding the selective permeability of biological hydrogels
… These hydrogels exhibit complex selective permeability behavior, allowing the passage of some particles while blocking the penetration of others. This selective permeability is critical for understanding the biological and medicinal impact of mucus, which coats all non-keratinized epithelia …
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Permeability studies in biomimetic glycosaminoglycan-hydrogel membranes
The rates of water and solute transport tend to be lower in fibrous materials than in bulk solution. This phenomenon of "hindered transport" is caused by steric, hydrodynamic, and electrostatic interactions between the solvent, the solute, and the fibers. In this research the effect of these …
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A vacuum permeability test for compacted clay
A vacuum permeability test utilizing high hydraulic gradients has been devised for compacted clay of low permeability. The test induces easily measurable flow rates in virtually impervious soils by placing a vacuum at the drainage end of the sample and an elevation head at the inflow end. The …
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Gas permeability of polyimide/polysiloxane block copolymers
… % poly(dimethylsiloxane) have been measured for permeability characteristics. The polyimide segment of the copolymers was based on oxydiphthalicdianhydride (ODPA) and 1,4-Bis(4-amino-1,1- dimethylbenzyl)benzene (Bis P). The polysiloxane was an aminopropyl terminated poly(dimethylsiloxane). …
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