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 16 of 16 for “"High temperature treatment"”.
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Mechanical properties and microcracking behaviour of heterogeneous rocks after high-temperature treatment
… exploitation and the geological disposal of high-level radioactive nuclear waste, plays a critical role in ensuring national energy security, optimizing resource utilization, and addressing environmental protection challenges. These projects contribute to the sustainable and rapid development …
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Effects of high temperature treatment on curl and microstructure of heavily boron-doped silicon
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1997.
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Thermal processing and the evolution of composition, structure and properties for sol-gel derived lead zirconate titanate thin layers
… of processes which occur during the high temperature treatment of sol-gel derived thin layers.
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Structural Characterization and Phase Behavior in Supported Metallic Nanoparticles
… X-ray absorption fine structure spectroscopy, temperature programmed desorption, and scanning-transmission electron microscopy. The data reveal that during activation in hydrogen the stabilizing CO shell is lost, and the metal centers assume an increasingly metallic electronic character. The …
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Mesoporous silica encapsulated metal nanoparticles in catalysis
… in heterogeneous catalysis, due to their high density of under coordinate sites associated with altered electronic properties. The structural and compositional design of bimetallic nanoparticles can further afford the precise control of activity and selectivity via the geometric and …
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Application of Far Infrared Radiation and Ethanol Vapor as Alternative Treatment Methods for Reduction of Salmonella enterica Tennessee in Dried, Ground Spices
… prompting development of additional inactivation treatments that reduce bacterial pathogens while maintaining spice quality. Spices are currently treated by fumigation with ethylene oxide, pasteurization with ionizing radiation, or steam treatment. However, these treatments exhibit flaws …
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Survival of Brown Colour in Diamond During Storage in the Subcontinental Lithospheric Mantle
… clusters as the cause of brown colour. Brief treatment in a high-pressure–high-temperature (HPHT) vessel at 1800–2700 °C can destroy the brown colour. There has been speculation that similar colour removal should occur continuously at depth in the SCLM. Diamonds are stored at 900–1400 °C in …
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Interacting effects of temperature and food on early growth of two plethodontid salamanders
… can vary due to environmental conditions such as temperature and food availability, further emphasizing the importance of knowledge of species demographics. In this study, I aimed to investigate the growth of young-of-the-year and juvenile plethodontid salamanders with different life cycles, …
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Factors affecting the timing and success of sockeye salmon spawning migrations
… having concentrations that were equal if not higher than those of females. The notion of protandrous migration, in which males synchronize their activities to the reproductive and migratory schedules of females, was postulated as the basis for this difference. Once in river however, successful …
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BIOCHARS AS AMENDMENTS FOR SASKATCHEWAN AGRICULTURAL SOILS
Biochars are the product of high temperature treatment of carbonaceous materials with little or no oxygen present, termed “pyrolysis”. Biochars derived from the pyrolysis of biomass feedstocks have proven effective amendments on highly weathered tropical soils. However less is known about their …
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Characterization of XVEF and XvCaM : two calcium-binding proteins isolated from the resurrection plant Xerophyta viscosa
… between 12 and 48 hours in response to a low temperature stress (4°C). A second gene, XvCaM, was isolated from a low temperature (4°C) cDNA stress library. Sequence analysis indicates that it has a 450 bp ORF corresponding to a 16.39 kDa protein, a pI of 3.90 and potential phosphorylation …
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Mitigating fouling of heat exchangers with fluoropolymer coatings
… and constructed to study fouling at surface temperatures around 90 °C. A microfluidic system with a 650 x 2000 µm flow channel enables fouling studies to be carried out by recirculating 2 l of raw milk. The apparatus operates in the laminar flow regime and the capability to probe the local …
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Growth and Proteolytic Activity of Selected Psychrotrophic Bacteria in Whole Milk and Whole Milk Retentate
… of milk has already proven to be a desirable pretreatment step in the commercial manufacture of various dairy products (10, 27, 40). The basic applications for .ultrafiltration of whole milk are total concentration of .milk, preconcentration of cheese milk and standardization of protein. The …
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Improving the performance of polypropylene matrix composite materials using engineered hemp fibre mats
… such as can be grown without pesticide and high yield of technical fibres. The hemp is cultivated in most of the EU countries. However, to improve hemp fibre composites to further replace synthetic fibre composites, research is required. Presented in this thesis are experimental …
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Cellulose based transition metal nano-composites : structuring and development
… and patterning methodologies that produce highly functional nano-hybrids. To achieve this, the mechanisms governing the catalytic processes that bring about graphitised carbons in the presence of iron have been investigated. It was found that, when infusing cellulose with an aqueous iron …
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Microhabitat, microbiota, mitochondria and the epigenome shape the biparental legacy of heat exposure in a tropical arthropod
… regarding climate change. Average global surface temperatures have risen by 1oC since pre-industrial levels, and it is estimated that temperatures will continue to rise by at least 1.5oC until at least 2100, despite mitigation efforts. The effect that such warming will have on biodiversity remains …