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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 115 for “"PEC"”.
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Mathematical Analysis on the PEC model for Thixotropic Fluids
… zero. The differential equation model (the PEC model) describing the evolution of the conformation tensor is analyzed. We model the flow when simple shearing is imposed by prescribing a total stress. One part of this dissertation focuses on oscillatory shear stresses. In shear flow, …
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Production and Characterisation of Self-Crosslinked Chitosan-Carrageenan Polyelectrolyte Complexes
… of self-crosslinked polyelectrolyte complex (PEC) gels, films and scaffolds. Chitosan is a positively-charged polysaccharide with NH3+ side groups derived from shrimp shells and, carrageenan is a negatively-charged polysaccharide with OSO3- side groups derived from red seaweed. These abundant …
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Dispersed and deposited polyelectrolyte complexes and their interactions to chiral compounds and proteins
… in functional multilayer (PEM) and nanoparticle (PEC) generation, where PEM films are deposited using Layer-by-Layer technique initiated by Decher and PECs are prepared using mixing-centrifugation technique initiated by our group. Its advantages (e.g. easy preparation) result in various …
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Chitosan-Cellulose Nanocrystal Polyelectrolyte Complex Particles: Preparation, Characterization, and In Vitro Drug Release Properties
Polyelectrolyte complexes (PECs) between chitosan, a mucoadhesive, intestinal mucosal permeability-enhancing polysaccharide, and cellulose nanocrystals, rod-like cellulose nanoparticles with sulfate groups on their surface, have potential applications in oral drug delivery. The purpose of this …
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Controlling antibody delivery, mechanical properties, and cell response of alginate-chitosan polyelectrolyte complexes
… based on their ability to target and bind to specific proteins or antigens. The antiangiogenic antibody, bevacizumab, targets and binds to VEGF to prevent angiogenesis. Bevacizumab has been approved for the treatment of recurrent glioblastoma, with concurrent radiation and chemotherapy, however …
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An evaluation of the hydrogen economy and metal oxide based photo-electrochemical cells
… leading suppliers [60]. Photo-electrochemical (PEC) cells connect the solar energy and hydrogen economy together by directly converting solar energy into chemical energy in the form of hydrogen gas. The metal oxide based PEC cell has advantages of low cost, high stability and durability and …
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Pneumatic ergonomic crutches
… we developed the pneumatic ergonomic crutches (PEC) that consisted of a pneumatic sleeve orthosis, an energy harvesting system and an energy storage system. The pneumatic sleeve orthosis utilized a soft pneumatic actuator, called fiber-reinforced elastomeric enclosure, coiled around the forearm …
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Solar Water Oxidation by Composite Cobalt-Based Catalyst/Oxide Semiconductor Photoanodes
Photoelectrochemical (PEC) water splitting is an attractive approach to capturing and storing the earth's abundant solar energy influx. The challenging four-electron water-oxidation half-cell reaction has hindered this technology, giving rise to slow water oxidation kinetics at the photoanode …
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Using molecule-surface interactions for improved photoelectrochemical device performance and modeling
… popular in the field of photoelectrochemical (PEC) water-splitting, a promising carbon-free approach to produce hydrogen from liquid water. PEC water- splitting cells consist of at least one semiconductor photoelectrode in contact with an aqueous electrolyte. Surface functionalization has been …
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Macrophage Suppression Across Genetic Barriers By a Spleen Cell Culture Derived Factor
… by resident murine peritoneal macrophages (PEC). The current investigation involved production of this macrophage suppressor factor (MSF) by spleen cells obtained from C57BL/10J and BALB/c mice and an assay for the maintenance of biological activity across genetic barriers. Suppression of …
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PHOTOELECTROCATALYTIC OXIDATION OF MUNICIPAL REVERSE OSMOSIS CONCENTRATE
… study, a UVA/LED driven photoelectrocatalysis (PEC) system was set up. This system was first applied to the degradation of trimethoprim. The effects of essential operational parameters were studied, with the focus on chloride. The results reveal that reactive chlorine species (RCS) converted …
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Photoelectrochemical fuel synthesis using organic semiconductors with (bio)molecular catalysts
Photoelectrochemical (PEC) devices offer great promise for simultaneous solar light harvesting and chemical storage, converting water and CO2 into value-added products. While progress has been made to improve their solar-to-fuel conversion efficiencies, most conventional prototypes face challenges …
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First-principles study of doped hematite surfaces for photoelectrochemical water splitting
Photoelectrochemical (PEC) water splitting, using sunlight and appropriate semiconductors to produce hydrogen (H2) fuel, is a promising route to solve both the production of clean H2 fuel and storage for solar energy. Owing to its various advantages, hematite (α-Fe2O3) has emerged as a promising …
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Living cationic polymerization of styrene monomers
… gel permeation chromatography (GPC) and NMR spectroscopy. Polymerizations of styrene were conducted using 1-phenyl ethylchloride (1-PEC) as an initiator and tin tetrachloride (SnCI4) as a catalyst in the presence of tetra-n-Butylammonium chloride (nBu4NCI). Effects of solvent polarity varied …
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Knowledge and practices of primary eye care among non-ophthalmic nurses working in Kweneng East District Clinics, Botswana.
Background: Primary eye care (PEC) is important in preventing and managing eye conditions, particularly in rural areas where access to specialized care is limited. Aim and Setting: The study aim was to assess the primary eye care knowledge and practices of non-ophthalmic nurses in Kweneng East …
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Synthesis and characterization of metal oxide semiconductors for photoelectrochemical hydrogen production
… magnetron sputtering for photoelectrochemical (PEC) applications. Metal-oxide thin films as a photoelectrode are of special interest for PEC systems to produce hydrogen in an aqueous solution by solar energy due to their low cost and potential stability. The following list represents some of the …
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Subcutaneous and oral delivery of insulin
… found to be stable in a polyelectrolyte complex (PEC) consisting of insulin and LMWC in the presence of Tris-buffer at pH 6.5. In the presence of LMWC, the stability of insulin increased with decreasing molecular weight of LMWC; 13 kDa LMWC was the most efficient molecular weight for enhancing the …
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The Impacts of Sex and Myogenic Cell Transplantation on Collateral Capillary Arteriogenesis
… ACC formation is a pre-existing collateral (PEC), which only some Balb/C mice have, so we also separated mice into PEC and non-PEC groups for analysis. In mice with a PEC, thrombin increased ACC number, and both myogenic cells and thrombin increased ACC diameter. There was a trend toward …
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H-BN integration in III-nitride devices for green hydrogen applications
… developing an integrated photoelectrochemical (PEC) cell for green hydrogen production using PEC water splitting. The focus is on integrating InGaN (Indium Gallium Nitride), GaN (Gallium Nitride), and h-BN (hexagonal Boron Nitride), which are promising materials for hydrogen production and …
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Development of Reactor Technology for the Photoelectrolysis of Seawater
… and by extension, photoelectrochemistry (PEC), is a process capable of environmental remediation and energy production via water splitting. This research focuses upon the development of novel materials and reactor technology which can be deployed for the purpose of chlorine generation, a …
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