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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 215 for “"melting temperature"”.
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Equilibrium concentration of interstitials in aluminum just below the melting temperature
… including a direct criterion for the onset of melting. A major prediction of the theory is that the equilibrium concentration of interstitial defects should be only about an order of magnitude less than the vacancy concentration near the melting temperature. Of the various properties affected …
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Development of a uniform-droplet spray apparatus for high melting temperature metals
The building and operation of a high-temperature uniform droplet spraying (UDS) apparatus extend the performance and capabilities of powder based manufacturing processes. Although the main concepts of operation of the high-temperature apparatus are typical to the ones currently existing in the …
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Variation of elasticity in water-saturated rocks near the melting temperature of ice.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1971.
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Atomistic modeling of graphene-catalyst interface and graphene edge effects on near melting temperature substrates
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Equilibrium Melting Temperature Determination of Semicrystalline Polymers through Nonlinear Hoffman-Weeks Extrapolation and Secondary Crystallization of Ethylene/Styrene Copolymers
… for the determination of the equilibrium melting temperatures of semicrystalline polymers is critically reviewed. It is shown that the linear extrapolation of observed melting temperatures cannot, in general, provide a reliable estimate of the equilibrium melting temperature. A more …
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Design of Improved Polyester Dielectric Insulators for Electronic Packaging
… described. Second, the nature of the increase in melting temperature of the liquid crystalline copolyesters upon annealing near their original melting temperature to improve the dimensional stability is elucidated. Lastly, a description of a new photosensitive copolyester dielectric insulator is …
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Numerical stimulation of stress-induced crystallization of injection molded semicrystalline thermoplastics
… orientation of polymer chains increase the melting temperature of the plastics, and hence, the supercooling which is the driving force for crystallization. By assuming that the effect of stress on crystallization is only by increasing the equilibrium melting temperature, the basic quiescent …
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High Resolution Melt Analysis of Samples with Differential DNA Methylation to Identify Tissue Source of Origin
… the two sperm markers examined, B_SPTB_03 had a melting temperature of 3.5 higher than the other tissue types tested (skin epithelial, vaginal epithelial, blood, and buccal), and DDX4 had a melting temperature that was 3.0 lower than the other tissue types. In addition, both of the blood markers, …
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Transport mechanisms and wetting dynamics in molecularly thin films of long-chain alkanes at solid/vapour interface : relation to the solid-liquid phase transition
… phase transitions. Immediately above the bulk melting temperature the alkanes wet partially the surface (drops). In this temperature range the substrate surface is covered with a molecularly thin ordered, solid-like alkane film ("surface freezing"). Thus, the alkane melt wets its own solid only …
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Crystallization and Melting Behavior of Linear Polyethylene and Ethylene/Styrene Copolymers and Chain Length Dependence of Spherulitic Growth Rate for Poly(Ethylene Oxide) Fractions
The crystallization and melting behavior of linear polyethylene and of a series of random ethylene/styrene copolymers was investigated using a combination of classical and temperature modulated differential scanning calorimetry. In the case of linear polyethylene and low styrene content copolymers, …
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Enabling multi-cation electrolyte usage in LMBs for lower cost and operating temperature
… was developed such that lower cost and lower melting temperature multi-cation electrolytes could be incorporated in liquid metal batteries (LMBs). In a first part of this work, Lithium-magnesium was proven to be a viable anode in a standard uni-cation (Li+) Li-Mg/LiCl-LiF-LiI/Sb-Pb battery. …
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Novel DNA probes for sensitive DNA detection
… of PCR products and mutation discrimination by melting temperature analysis.<br/>The research reported includes investigations into the effects of different modifications to<br/>improve the performance of HyBeacon® probes as well as the effect of different dyes in a<br/>FRET system, including …
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Morphology and Properties of Amorphous Polyethylene Terephthalate
… was ultraquenched from above its equilibrium melting temperature. Sufficiently rapid quenching rate below T(,g) and heating above the critical temperature before quenching were identified as necessary conditions to produce uniform morphology. Under other conditions, a conventional nodular …
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Crystallization and Melting Studies of Poly(ε-caprolactone) and Poly(ethylene oxide) using Flash™ Differential Scanning Calorimetry and Preparation and Characterization of Poly(δ-valerolactone) Fractions
The isothermal crystallization and melting temperatures of poly(ε-caprolactone) were correlated using fast differential scanning calorimetry. The melting kinetics was found to be independent of isothermal crystallization temperature and time. The conventional Hoffman-Weeks method could not be used …
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Investigation of thermal decomposition as the cause of the loss of crystalline structure in sucrose, glucose, and fructose
… sugars prior to use in specific applications. Melting has been commonly used for sugar characterization because it is an easy and quick property to measure, yet is usually repeatable and robust. In general, melting is determined by heating a sugar at a specified scanning rate using a thermal …
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Prozessentwicklung mit maßgeschneiderten rekombinanten Biokatalysatoren zur Synthese einer Bulk- und einer Feinchemikalie
… of the process windows (activity, half-life and melting temperature) of both enzymes enabled self-sufficient regeneration of host internal cofactors, so that high costs for external addition of cofactors or auxiliaries are saved. Buffer screening and selection further improved process economy but …
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Morphology, Crystallization and Melting Behavior of Propylene-Ethylene Statistical Copolymers
In this work the morphology, crystallization and melting behavior of novel Dow Chemical propylene-ethylene copolymers were investigated. The incorporation of ethylene units into a polypropylene chain resulted in the decrease in crystallization, melting and glass transition temperatures and overall …
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Synthesis, Characterization and Evaluation of Sonochemically Generated Materials
… Fe colloids. It has been found that changing temperature, precursor concentration, stabilizer amount, frequency, and sparging gas has no noticeable effect on the size distribution of Fe colloids, which remain in the 3--12 nm range. We have concluded that the size distribution does not change …
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Exploring Downhill Protein Folding Free Energy Landscapes
… kBT, is investigated by combining laser induced temperature-jump kinetics measurements and Langevin dynamics simulations. A kinetic and thermodynamic survey of multiple WW domain mutants is performed in combination with a model to reveal the correlation between protein stability and downhill …
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Economical furnace processing for 3-D printed metal parts
… the part is heated to near the powder's melting temperature and necks form at the contact points between particles. During infiltration, a lower melting temperature alloy is melted while in contact with the porous skeleton and capillary forces wick the alloy into the skeleton and fill the …
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