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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 65 for “"membrane structure"”.
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Dynamics of Membrane Structure Formation in Quenched Polymer Solutions
… experimental data are available, and two common membrane-forming systems, poly(ether sulfone) [PES]/dimethylsulfoxide [DMSO]/water and cellulose acetate [CA]/acetone/water. The effects of quench temperature and initial solution composition on the predicted structure-formation dynamics are …
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Effect of iodination on NF270 nanofiltration membrane structure and performance
Made available in DSpace on 2017-09-29T17:56:46Z (GMT). No. of bitstreams: 2 LEVATO-THESIS-2017.pdf: 2402000 bytes, checksum: 8c4f49706ddd057c5afa20f7897ce3cd (MD5) LICENSE.txt: 4213 bytes, checksum: 3a65aed08aeda2d8e61923f83a1c2953 (MD5) Previous issue date: 2017-07-14
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The missing dimension of cell membrane organization. Study on cubic membrane structure and function
Membranes are of fundamental importance for biological systems. They provide for cellular compartmentalization and control of the internal cell environment. The biophysical properties of the membrane lipids and proteins play a key role in determining the membrane morphology and geometry. Far from …
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Ionic and Charge Movement Currents in a Sunfish Skeletal Muscle (Membrane Structure, Temperature, E-C Coupling)
Electrical properties of striated muscle in a sunfish, Lepomis cyanellus, have been examined using a three microelectrode volt- age clamp method. The preparation was bathed in Ringer solutions designed to suppress unwanted currents and mechanical activity.
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Development and Application of Modern Optimal Controllers for a Membrane Structure Using Vector Second Order Form
… high dimensional systems, very light and large structures are being designed and built for aerospace applications. One example is a reflector of a space telescope that is made of membrane structures. These reflectors are light and foldable which makes the shipment easy and cheaper unlike …
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Examining the effect of anti-tumor lipid drugs on pH homeostasis and membrane structure in Saccharomyces cerevisiae
… lipid drug that is known to target cellular membranes. The underlying mechanisms leading to cell death remain largely controversial, although previous results obtained using yeast, have indicated that edelfosine associates with lipid rafts at the plasma membrane (PM), resulting in the …
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Diffusion kinetics and phase separation phenomena during asymmetric membrane formation
… phase inversion process for forming asymmetric membrane structure have been carried out. A comprehensive model combining the evaporation and quench steps of phase inversion has been developed by using an improved numerical algorithm based on a modification of the jump mass balance equations. …
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Physiological Changes Occurring in the Cellular Membranes of Clostridium Acetobutylicum ATCC 824 and a Butanol-Tolerant Mutant During the Acetone-Butanol-Ethanol Fermentation
… the cell. It is known that alcohols disrupt the membrane structure and function, therefore it would be important to determine how butanol disrupts the membrane and what adaptative response(s) would be beneficial.
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Theoretical and experimental investigation of membrane distillation
Invented in the 1960s, membrane distillation is an emerging technology for water treatment attracting more attention since 1980s. There are four configurations of membrane distillations including air gap membrane distillation (AGMD), direct contact membrane distillation (DCMD), sweep gas membrane …
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Slab-Geometry Molecular Dynamics Simulations: Development and Application to Calculation of Activity Coefficients, Interfacial Electrochemistry, and Ion Channel Transport
… ion transport through a model biological channel-membrane structure. The charged-sheets, 2-D Ewald, corrected 3-D Ewald, and corrected particle-particle-particle-mesh (P3M) methods were compared for efficiency and applicability to slab-geometry electrolyte systems with discrete water molecules. …
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Stabilized space-time fluid-structure interaction techniques with the continuum element
… to add continuum element functionality to the structure side of our Fluid-Structure Interaction (FSI) solver. The FSI solver, already capable of handling the interaction between membrane structure elements and fluid elements, can now accurately simulate fully 3D structure models as well. A few …
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Electrohydrodynamic Simulations of the Deformation of Liquid-Filled Capsules
… for the fluid, finite element method for the membrane structure of the capsule, fast immersed interface method for the electric field and immersed boundary method being used to consider the fluid-structure-electric interaction. Under the effect of electric field, two different types of …
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Effects of environmental temperature on members of the mucorales
… groups. Subsequent investigations of plasma membrane permeability suggested that plasma membrane structure and function may be significant in establishing both the upper and lower growth temperature limits characteristic of psychrophiles, mesophiles and thermophiles. Analysis of the plasma …
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Structural effects of chloraminated seawater on the SW30HR reverse osmosis membrane
… to control biofouling of reverse osmosis (RO) membranes, react with the polymeric active layer and affect membrane performance as a result. This work investigates structural and performance changes to the SW30HR RO membrane exposed to seawater disinfected with monochloramine. Batch experiments …
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Dynamics and Control of Smart Structures for Space Applications
… When these materials are incorporated into structures, they create smart structures. This work is concerned with the dynamics and control of three smart structures: a membrane structure with shape memory alloys for control of the membrane surface flatness, a flexible manipulator with a …
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The Influence of Membrane Lipid Order on Cell Shape and Microvesiculation in Human Erythrocytes
… cell shape and stimulates shedding of the cell membrane in the form of microvesicles. We hypothesized that both the shape transition and microvesiculation are influenced by microscopic membrane physical properties such as lipid order. To test this hypothesis, membrane properties were manipulated …
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Synthesis of an isotopically labelled analog of the antimicrobial peptide ll-37
… of action is by disruption of the bacterial cell membrane structure. LL-21 is a simplified form of the peptide that contains only the core portion of LL-37, which retains antimicrobial activity and is easier to synthesize. We synthesized an 15N –Val-labeled LL-21 peptide which allows us to perform …
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Development of Novel Eddy Current Dampers for the Suppression of Structural Vibrations
… in the development of ultra large inflatable structures that can be packaged inside the shuttle bay and then deployed once in space. To facilitate the packaging of the inflated device in its launch configuration, most structures utilize a thin film membrane as the optical or antenna surface. …
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Design, modeling, fabrication and testing of a piezoelectric microvalve for high pressure, high frequency hydraulic applications
… beneath a micromachined annular tethered-piston structure. An hydraulic amplification mechanism was employed to amplify the limited stroke of this piezoelectrically-driven piston structure to a significantly larger motion (40-50x) of a micromachined valve membrane with attached valve cap. This …
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