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 16 of 16 for “"semi-permeable membrane"”.
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Advancing Industrial Decarbonization: Evaluating the State of Organic Membrane Technology for Class-Based Hydrocarbon Separation
… contributing to global temperature rise. As membrane separations have successfully reduced energy requirements in water purification and desalination, their application in organic separations, a challenging area to decarbonize, is gaining attention. With gas phase organic membrane separations …
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Microemulsions containing centella asiatica extract as antioxidant and anti-acetylcholinesterase agent
… 60% of F1 was released within 24 h across the semi-permeable membrane dialysis bag. Additionally, the brine shrimp lethality assay (BSLA) showed a mortality 10%. In conclusion, this study shows that F1 has good antioxidant and anti-acetylcholinesterase activities which can play a promising role …
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Bioresorbable Osmotic Pump for Long–term Contraception
… engine causes water flux into the pump through a semi-permeable membrane, and the increased internal pressure from the expansion causes the drug formulation to be pushed out through the orifice on the other side. To our best knowledge, bioresorbable osmotic pump implants have never been …
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Osmotic reflection coefficient
… osmotic flow. The simple case is of the ideal semi-permeable membrane which completely excludes the solute. The flow through such a membrane is directly proportional to the thermodynamic pressure drop less the osmotic pressure drop. For membranes which partially exclude the solute the osmotic …
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Structure-Property Relationships in the Design of High Performance Membranes for Water Desalination, Specifically Reverse Osmosis, Using Sulfonated Poly(Arylene Ether Sulfone)s
… in the last 80 years that employ either membrane technology or temperature alterations to desalinate either brackish or seawater. One of the fastest growing methods for producing freshwater is reverse osmosis. Reverse osmosis uses an externally applied pressure, in the form of a cross …
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Advancing Forward Osmosis for Energy-efficient Wastewater Treatment towards Enhanced Water Reuse and Resource Recovery
… trace organic chemicals. To promote water reuse, membrane-based technologies have emerged as a robust and more efficient alternative to current treatment practice. Among these membrane processes, forward osmosis (FO) utilizes an osmotic pressure gradient across a semi-permeable membrane to reclaim …
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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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The application of active and passive bioaccumulation methods to measure metallic and organic pollutants along the Namibian coastline
… Harbour in Namibia. Artificial mussels (AMs), semi-permeable membrane devices (SPMDs), resident- and transplanted mussel bioindicators (Choromytilus meriolionalis) were deployed at two exposure sites (Walvis Bay Harbour & Swakopmund) for six weeks. Element concentrations (Al, As, Cd, Co, Cu, …
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Development and assessment of a novel osmotic heat engine for energy generation from low-grade heat
… The osmotic heat engine (OHE) is a closed-loop, membrane based process that utilizes low-grade heat and salinity-gradient energy between two streams for electrical energy generation. The OHE couples pressure retarded osmosis (PRO), an osmotically driven membrane process, with membrane …
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3D printing in Clinical Diagnostics: A Versatile Tool to Develop Testing Devices for the Diagnosis of Infectious Diseases
… culture well into a bacteria-free well through a semi-permeable membrane, which allows for streamline sample processing for clinical diagnostics of bloodstream infections. The MCD validated through the analysis of the metabolic flux to identify different strains of bacteria, including Escherichia …
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Markers and mechanisms of pre-eclampsia in pregnancies complicated by diabetes
… by ELISA. JAR and BeWo cells were cultured on semi-permeable membrane inserts in Transwell plates for up to 16 days, then exposed to N-LDL vs. HOG-LDL. Transepithelial electrical resistance (TEER) was measured after 6, 12 and 24 hours of treatment and fluorescein-isothiocyanate (FITC)-dextran …
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Modeling fluid imbibition for hydraulic fracturing and its implications on unconventional hydrocarbon recovery
… matrix is conceptualized as a combination of semi-permeable membrane-like components and non-membrane components and the osmosis membrane efficiency term is redefined to properly simulate osmosis effect and rock-ion interactions. Moreover, to handle the sub-normal water saturation conditions …
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Design and Development of a Bio-inspired Robotic Jellysh that Features Ionic Polymer Metal Composites Actuators
… Ionic polymer metal composites consist of a semi-permeable membrane bounded by two conductive, high surface area electrode. The IPMCs are manufactured is several variations using the Direct Assembly Process (DAP), where the electrode architecture is controlled to optimize the strain and …
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Investigation of Single-Cell and Blood-Brain Barrier Mechanics after Electroporation and in Primary Brain Cancers
… a phenomenon characterized by increased cell membrane permeability, also can cause significant changes to cell and tissue mechanics. Here, we investigate the mechanics of brain and brain cancer cells, specifically focusing on how PEFs impact cell mechanics and PEF-induced blood-brain barrier …
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Design and performance testing of a novel ceiling panel for simultaneous heat and moisture transfer to moderate indoor temperature and relative humidity
… medium and the surface of the panel is made of a semi-permeable membrane. A HAMP can be installed into a space and heat and moisture will be transferred between the liquid desiccant and the space air, through the membrane. The main objectives of this thesis are to design a prototype HAMP and to …