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 91 for “"temperature stability"”.
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Elevated temperature stability of gallium arsenide integrated circuits
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Strategies to influence temperature stability of dark chocolate in tropical regions
… RStudio (RStudio, Boston, MA). In Phase 1, temperature cycling resulted in decreased visual and textural quality. Tempered samples with 5% palm stearin presented less WI at 34°C cycle 3 as compared to tempered controls, indicating that chocolate with 5% palm stearin can resist some degrees …
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Pressure Dissociation and Temperature Stability of Lactate Dehydrogenase (Oligomeric, Proteins, Conformational, Drift, Activity)
… at 4(DEGREES)C by the same methods. Decreasing temperature plays a role equivalent to that of increasing pressure. We finally were able to demonstrate the existence of the microscopic cycle at room temperature and atmospheric pressure by the hybridization of active and inactive enzyme and by the …
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Increasing the temperature stability of environmentally friendly drilling and completion fluids based on organic brine.
… complement synthetic polymers and extend their temperature capabilities as drilling fluids. However, as HPHT drilling continues to move into more harsh environments with expected bottom-hole temperatures of over 300°C; further research is required to improve the temperature ceiling of …
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Engineering and Characterization of a Single Chain Antibody Specific for Murine CD28
Finally, a novel method of measuring the thermal stability of engineered antibody fragments using yeast surface display and flow cytometry was produced. This method allowed for the rapid determination of relative temperature stability without the need to produce large quantities of protein. This …
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Characterization of the Integration of Additively Manufactured All-Aromatic Polyimide and Conductive Direct-Write Silver Inks
… electronic parts. These limitations include low-temperature processability (leading to high trace resistivity) and poor surface finish (leading to electronic shorts and disconnections). Recently discovered ultraviolet-assisted direct ink write (UV-DIW) all-aromatic polyimide (PI) provides an …
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Gallium arsenide field effect transistors microstrip integrated circuit dielectric resonator oscillators
… usually evaluated in terms of their frequency stability, reliability, size, cost, efficiency and output power characteristics. In terms of these parameters DROs outperform Gunn cavity oscillators and are only bettered by crystal locked sources in terms of frequency temperature stability and …
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Impact of Temperature and Microbial Infection on the Honey Bee Hemocytes
… reflects optimal hive conditions, suboptimal temperatures (22°C) and stressors like pathogens (Varroa destructor, bacteria) or pesticides impair hemocyte function. Using clodronate liposomes (CLD) to deplete hemocytes, we assessed how immune suppression interacts with these stressors.</p> …
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A temperature insensitive low noise RC relaxation oscillator
A 50 kHz temperature insensitive RC relaxation oscillator is presented. A novel RC branch, which has a zero temperature coefficient (ZTC) point in its charging curve, is used so that the period of the oscillator is insensitive to temperature variation. With the absence of current source in the RC …
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Isolation and Characterization of Thermostable Alpha-Galactosidases for Application of High-Temperature Processing of Soy Molasses
… a pH optimum of 8.0 and demonstrates broad pH stability. The optimum temperature of enzyme activity was 77.5$\sp\circ$C, with a demonstrated temperature stability up to 70$\sp\circ$C. Known sulfhydryl groups inhibitors decrease enzyme activity. Attempts have been made to clone the Strain …
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Reactive based NOx sensor
… in a simulated exhaust environment indicate high-temperature stability and sensitivity to nitric oxide at 4.8 ppm levels. A method for the rapid investigation of electrolyte and electrode materials has been developed.
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Ultra-thin moisture barrier coatings for passive components
… applications, particularly where high temperature stability is required. These capacitors are sensitive to high humidity, and if they are not protected from moisture exposure their performance degrades rapidly due to electrochemical corrosion. Conventional protective coatings, such as …
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Si-DLC coatings optimized for low wear and low friction applications.
… wear, low friction properties, and improved temperature stability for the coatings.A literature survey on sputtering, plasma enhanced chemical vapor deposition (PECVD) and carbon based materials with a focus on a-C:H and Si-DLC coatings is given. This survey includes a brief overview of the …
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Keramische Brennelemente für Kugelhaufen-Druckwasserreaktoren mit inhärenten Sicherheitseigenschaften
… This concept bares analogies to the High Temperature Reactor (HTR). I will be shown, which contribution can be realized by the application of ceramic materials within this concept. The focus of this dissertation will be on the production and the characteristics of ceramic coated, graphite …
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The temperature dependence of the electro-optic kerr effect in solutions
… Kerr cell of greater optical path length and temperature stability has been designed and built. The Kerr effect experimental has been substantially automated using an Apple IIe computer. Software has been written allowing the computer to partially control the Kerr effect equipment and to …
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Design and Analysis of a 80 GHz Hybrid CMOS Dielectric Resonator Oscillator
… their high quality factor, low cost, and high temperature stability which makes them a desirable frequency selecting element in design for millimeter-wave (mmWave) applications. Current dielectric resonator oscillators (DRO) have proven to be phase stable, but are limited in frequency (< 40Ghz) …
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Structural Investigations of Nematode Anhydrobiotic and Rab11-FIP Proteins by Far-UV Circular Dichroism and Mid-IR Fourier Transform Infra-Red Spectroscopy
… FTIR methods were found to be useful for protein stability studies, where CD is suited to analysing a-helix stability through CD222 protein melts, and FTIR is capable of investigating protein aggregation phenomenon (together with 2D correlation spectroscopy) and b-sheet stability. The …
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Zeitabhängige Phänomene in athermischen Formgedächtnislegierungen
… order to measure incubation time as well as the stability of the phase transition temperatures Ms, As and the corresponding hysteresis width B. All measurements were conducted in custom made sample chambers allowing for a temperature stability of 2mK over a timescale of some days. In comparison …
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Deposition and Characterization of Ceramic Thin Films and a New Experimental Approach to Evaluate the Mechanical Integrity of Film/Substrate Interfacial Layers
Due to their corrosion resistance, high temperature stability, high strength, and high hardness, refractory ceramic thin films and coatings have been utilized for surface engineering of mechanical components and mechanical fabrication tools. Adhesion between ceramic thin films and coatings and the …
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Low Pressure and Short-Time Silver-Sintering for Power Modules
… due to its excellent thermal conductivity, high temperature stability and mechanical reliability. However, the traditional silver sintering process generally has the problems of long sintering time and high auxiliary pressure, which not only restricts the industrial production efficiency, but …
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