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 10 of 10 for “"Pre-irradiation"”.
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The thermal decomposition of unirradiated and irradiated lithium azide
… decomposing particles. The effects produced by pre-irradiation with γ-, X- and U.V.- radiation on the subsequent thermal decomposition have been studied. These studies were largely on the powdered lithium azide, but some attention was also given to pre-irradiating the pelleted material. …
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Development and characterization of nanostructured steels and high entropy alloys for nuclear applications
… defect sinks. This work aims to study the pre-irradiation microstructure and irradiation tolerance of nanostructured 304 produced using SPD.</p> <p>HEAs have been theorized to have retarded diffusion which prevents large voids and dislocation loops from forming in addition to their good …
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Noninvasive Assessment of Tumor Hypoxia Using MRI in Clinical and Preclinical Tumor Models
… available to quantitatively map pO2 dynamics in preclinical studies, new techniques are needed to noninvasively characterize tumor hypoxia and response to interventions in patients. Blood Oxygen Level Dependent (BOLD) MRI based on T2* contrast induced by deoxyhemoglobin concentration [dHb] is …
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Exogenous enzymes and irradiation of barley reduce the anti-nutritional activity of non-starch polysaccharides in broilers
… lipid type, exogenous carbohydrase enzymes and irradiation were investigated. Ten treatment diets were fed to broilers in a performance and digestibility trial. Eight of the diets contained high levels of NSP, achieved by a high barley inclusion of 55% of the diet. Four of the treatments made …
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Irradiation-induced nanoclusters and their evolution in compound forming ni-base and cu-base alloys
Nanostructured alloys with finely dispersed precipitates are actively studied for designing materials tolerant to irradiation at high temperatures. The challenge is that nanostructures will often coarsen under elevated temperature irradiation or annealing, owing in part to radiation-enhanced …
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Radiation Study of the Organic Photovoltaic Cell P3HT:PCBM
… While these solar cells are less efficient (presently < 12%) than traditional silicon or III-V semiconductor based solar cells, the reduced efficiency is compensated for by their lower weight. This leads to a higher specific power and hence a lower load for launch. Furthermore, their …
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Gamma irradiation response of photonic crystal and standard optical fibre Bragg grating sensors for radiation dosimetry
… A comparative analysis of responses to gamma irradiation between standard commercial FBGs and new generation FBGs written in Photonic Crystal fibre (PCF) were examined under similar regimes and conditions. Current research suggests that the FBGs performance, when exposed to Cobalt-60 gamma …
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Effect of nanoparticles on human cells from healthy individuals and patients with respiratory diseases.
… physico¿chemical properties and so could have unpredictable effects. Zinc oxide (ZnO) and titanium dioxide (TiO2) are widely used in a number of commercial products. There are published studies indicating that some forms of these compounds may be photo-clastogenic in mammalian cells. What has not …
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An optical computed tomography scanner for three dimensional gel dosimetry of radiotherapy dose distributions
… practical and accurate than those demonstrated previously. This would address key aspects relating to clinical appeal. A specific application of stereotactic radiosurgery was targeted, where small dose distributions are delivered with high spatial accuracy to cranial tumours. Improvements in the …
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Understanding the Impact of Nuclear Environment on the Hydrothermal Corrosion in SIC
… on materials because they are subjected to irradiation, high pressure, high temperature, and aqueous chemistry. Experiments were performed under prototypical LWR conditions (Pressure, temperature, flow rate) to understand the corrosion and silica dissolution characteristics of high purity …