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 48 for “"polymer-coated"”.
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Polymer coated superparamagnetic beads walking on polymer coated surface
… of coating the beads and the surface with a polymer, Polyethylene Glycol(PEG). PEG has been shown to undergo a transition from an expanded state to a collapsed state under certain salt concentrations and temperature ranges. By looking at this transition we can see if the use of a polymer …
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Nucleate boiling from polymer coated surfaces.
… of both the effects of nucleate boiling on polymer coated surfaces and the effects of the polymer coated surfaces on the nucleate boiling curve. The nucleate boiling curve (the curve resulting from plotting heat transferred per unit area versus the temperature difference between the boiling …
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Polymer Coated Electrodes as Microelectrochemical Media
Gold film electrodes were coated with polymer films less than 1000 (ANGSTROM) thick, then electrochemistry was done on samples absorbed into the film from solution. Detailed studies of potassium ferricyanide in a poly(4-vinyl pyridine) film showed that cyclic voltammetry can indeed be done …
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Polymer-coated iron oxide nanoparticles for medical imaging
… and safe materials used in medicine are polymer-coated iron oxide nanoparticles. This dissertation describes several formulations for in vivo imaging applications. The paramagnetic polymer-coated iron oxide nanoparticle aminoSPARK is used as a fluorescence-mediated tomography (FMT) …
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Development of polymer-coated nanoparticle imaging agents for diagnostic applications
… work, we describe the design and development of polymer-coated nanoparticle imaging agents for use in blood, cell and tissue diagnostic applications. Low-molecular weight, amphiphilic polymers capable of noncovalent interactions with nanoparticle surface ligands and the aqueous environment were …
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Bioplastics from C1 Gases - Substitute Sustainable Products for Polymer Coated Steel
… for its disposal. Therefore, biodegradable polymers created from industrial by-products would be a sustainable alternative.<br/><br/>Tata Steel has already a pilot plant that converts blast furnace gases into VFA and particularly into acetate. It was then proposed to use …
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Compatibility and toxicity of polymer-coated magnetic nanoparticles on mammalian cell systems
(cont.) produced normal growth curves in the presence of particles. However, the particles do still exhibit some toxicity towards the cells, as the maximum cell density of cells cultured with particles does not reach that of control cultures. Both particles were found to increase the oxygen …
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Experimental and numerical analysis of nano-enhanced polymer coated steel plates subjected to ballistic loading
… This research investigated several nano-enhanced polymers for their suitability in high-speed impact protection applications. The polymers were tested mechanically to find ideal nano-particle additive percentages then coated onto steel substrates. These coated substrates were impacted using …
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Refractometry Studies of the Optical Properties of Polymer Films and the Development of Polymer Coated Refractive Index Sensors
… used to characterize the interactions between polymer films and liquid or vapour-phase analytes. A camera was used to capture both Fresnel reflection and total internal reflection within the prism. For thin-films (d = 10 μm - 100 μm), interference fringes were also observed. Fourier analysis of …
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Nitrogen release, tree uptake, and ecosystem retention in a mid-rotation loblolly pine plantation following fertilization with 15N-enriched enhanced efficiency fertilizers
… forestry: 1) NBPT treated urea (NBPT urea), 2) polymer coated urea (PC urea), and 3) monoammonium phosphate coated NBPT treated urea (MC NBPT urea). Urea, MC NBPT urea, and NBPT urea fertilizer treatments showed an extractable NH4+ spike 14 days after fertilization while the polymer coated urea …
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Developments in Analytical Chemistry: Acoustically Levitated Drop Reactors for Enzyme Reaction Kinetics and Single-Walled Carbon Nanotube-Based Sensors for Detection of Toxic Organic Phosphonates
… drop reactor was applied to the development of polymer-coated single-walled carbon nanotube-based sensors as a detector for a miniature, or micro, gas chromatograph.
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Molecular Theory of the Structure, Thermodynamics, and Miscibility of Polymer Nanocomposites
… epsilonpc, nanoparticle ""imprintation"" on the polymer matrix occurs, rearranging the particles and destroying much of the fine scale structure seen at &phis; ≈ 0. The sterically stabilized phases become attractive, with long-range, shallow attractive wells. As epsilonpc is increased, …
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Coated and Uncoated Nickel-Titanium Archwires: Mechanical Property and Surface Topography Response to a Simulated Oral Environment with and without Bracket-Related Load Deflection Induced Stress
… and surface characteristics of esthetic coated and uncoated nickel titanium archwires. Two types of coated archwires were tested: one with a rhodium ion coating and another with a polymer coating. Corresponding uncoated wires of the same size were also tested. These four different wires …
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Coating of Polyvinylchloride for Reduced Cell / Bacterial Adhesion and Antibacterial Properties
… a biocompatible, hydrophilic and antibacterial polymer by a mild surface modification method. The surface was first activated and then functionalized, followed by coating with polymer. The surface functionality was evaluated using cell adhesion, bacterial adhesion and bacterial viability for …
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A study of chlorinated polymer coatings in a fretting interface
… this study is to determine whether chlorinated polymers such as polyvinylchloride (PVC) and polyvinylidenechloride (PVDC) degrade in a fretting interface. Polymer coated 52100 steel balls are fretted against a polished 1045 steel plate for 30 minutes in air and nitrogen at 25-30 percent and …
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Understanding the impact of polymer functionalized electrode fabrication and cycling conditions on stability and selective separation of micropollutants
… via electrochemically-mediated capture at polymer interfaces in order to improve water security. Heavy metal pollutants such as arsenic have diverse physico-chemical properties which renders them intractable in current treatment technologies such as wastewater treatment plants (WWTPs). …
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Characterization and Pharmacokinetics of Rifampicin Laden Carboxymethylcellulose Acetate Butyrate Particles
… anti-tuberculosis drugs have focused on creating polymer coated rifampicin nanoparticles. The research effort presented in this thesis evaluates the formation, characterization and relative bioavailability of rifampicin loaded carboxymethylcellulose acetate butyrate (CMCAB) particles using two …
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Investigation of polymers used in lithium oxygen batteries as electrolyte and cathode materials
… oxygen batteries. In this Master project, polymers were employed as electrolyte and cathode materials due to their unique superior properties. Using different methods, we synthesized suitable gel polymer electrolytes and conducting polymer catalysts for lithium oxygen batteries. Techniques …
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