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Showing 1 to 17 of 17 for “"Microtubes."”.
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Polymer, Metal, and Ceramic Microtubes by Strain-driven Self-rolling
… is removed by pyrolysis resulting in pure metal microtubes. The fabrication of silica and silica/gold hybrid tubes of high aspect ratio is also demonstrated. Polydimethylsiloxane (PDMS) is used as a precursor of the silica and it is converted into silica by pyrolysis at high temperature. Entire …
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Experimental Investigation of Liquid and Particle -Laden Flows in Microtubes
Since flow blockages are the ultimate form of increased flow resistance, the research emphasis is focused on the mechanisms that lead to blockage. Different blockage mechanisms are observed in different regimes defined by the ratio of particle diameter to tube diameter. For example, for 0.33 D < dp …
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NUMERICAL ANALYSIS OF CO-FLOWING IMMISCIBLE LIQUIDS IN CO-AXIAL MICROTUBES
This research developed dimensionless correlations, based on the numerical simulations, for the boundaries between the dripping, transition and jetting regimes. Additional correlations are also developed for the radius and formation frequency of disperse droplet in the dripping regime and the …
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An experimental investigation of heat transfer to hydrogen peroxide in microtubes
… 4 mm long, electrically heated stainless steel microtubes have been performed to define the stability limit and explosion condition associated with 98% hydrogen peroxide thermal decomposition. Conditions such as pressures, temperatures, heat fluxes and length scale found in the engine were …
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Self-rolled-up microtubes for on-chip microfluidic DNA storage and passive electronics applications
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Modelling and multi-objective optimisation of heat transfer characteristics and pressure drop of nanofluids in microtubes
A literature study was performed on the inner mechanisms of nanofluids and flow in microchannels. With ever changing technology, the need for smaller and more efficient devices has come about in the last couple of years. With the shrinking in size of components in electronics, an increase in heat …
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Characterization of neurite growth on a novel neurotube platform
… optically transparent, self-rolling microtubes are presented and the interaction of the neurites with the microtubes is analyzed. This novel substrate and application have the potential to provide unique insights into the mechanisms that drive organization of the dendritic …
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Determination of the Leak Size Critical to Package Sterility Maintenance
… pressures (Po) required to initiate flow through microtubes of IDs 0, 2, 5, 7, 10, 20 or 50 m, were measured using 63 test cells filled with safranin red dye, tryptic soy broth, and distilled water with surface tensions of 18.69 mN/m, 44.09 mN/m, and 64.67 mN/m, respectively. Significant …
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Competitive Enzyme Immunoassay by Polyclonal Antibodies Against Organophosphorus Pesticides
… required to test OPs.</p> <p>Microwells and microtubes were utilized as the solid-phase immobilization for the development of an enzyme immunoassay for OPs. A sensitive and simple microtube based competition enzyme immunoassay for the quantitative determination of organophosphorus compounds …
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Aerosol exposure biotesting for package integrity testing
… contamination of sealed flexible pouches. Nickel microtubes with 10 μm and 20μm hole diameters and lengths of 5 mm and 10 mm were used in various combinations to create seal defects in 128 retortable pouches. A 119,911 cm³, exposure chamber was used to distribute an aerosol with a particle size of …
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Predicting Package Defects: Quantification of Critical Leak Size
… chamber was used to test micro-defects, nickel microtubes of known diameters 2, 5, 7, 10, 20, and 50 μm hydraulic diameters, against pressure differentials of 0, -6.9, -13.8, and -34.5 kPa.
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Application of self-rolled-up membrane technology for enhanced neuron guidance and alignment
… foundation for further adaptation of the SiNx microtubes for applications for neuroregenerative therapies.
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Biomedical applications of nanostructured polymer films
… In addition, we have designed polymeric microtubes that can control their orientation on the surface of living cells. Inspired by chemically non-uniform Janus particles, we designed tube-shaped, chemically non-uniform microparticles with cell-adhesive ligands on the ends of the tubes and …
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The Simulation, Development, and Testing of a Staged Catalytic Microtube Ignition System
… safety. This study demonstrates that catalytic microtubes can be used to cause ignition of a bipropellant mixture in a rocket application and develops a unique ignition system as a low energy alternative or redundant ignition system as compared to current spark systems. Part I covers the …
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Development of Novel Methodologies for the Electrodeposition of Polypyrrole-based Films in Controlled Morphologies with Potential Application in Nitrate Sensing.
… TEM analysis of individual closed-pore microtubes identified a hollow interior at the base within which the toluene droplet was encapsulated. This cavity may be used to entrap other compounds making these materials useful in a range of applications. The methodology was also applied to …
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Strain-induced self-rolled-up semiconductor micro/nanotubes: Fabrication and characterization
… GaAs quantum well tubes. Optical properties of microtubes where the GaAs quantum well is embedded in the tube wall as the optical gain medium will be studied using the photoluminescence measurement system. Chapter 5 demonstrates several types of hybrid tubes. Metal/semiconductor, silicon …
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Facile protein and amino acid substitution reactions and their characterization using thermal, mechanical and optical techniques
The work focused on addressing four main objectives. The first objective was to quantify protein and amino acid substitution reactions. Michael addition reactions were used to modify the amino acids and protein. Amino acids alanine, cysteine, and lysine, and protein ovalbumin (OA) were substituted …