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Characterization of Thrombocytopenia and the Immature Platelet Fraction in Neonatal Sepsis
No full textOrganic geochemistry in oceanic hydrothermal systems: implications for prebiotic synthesis, extraterrestrial habitability, and green chemistry
No full textHydrothermal systems are unique environments that are relevant to manydifferent applications. In particular, this dissertation details their relevance to the origin of life on Earth, the search for extraterrestrial habitable environments, and their use in sustainable practices. Chapters Two and Three seek to investigate the influences of parameters such as temperature, pH, and metal salts on the reaction pathways of important organics, including alkenes and amino acids, respectively. Acidic solutions promote the hydration and dimerization pathways of alkenes, while the presence of metal salts can enhance the dimerization and oxidation pathways. Similarly, these geochemical parameters influence amino acid reaction pathways and product distributions, where lower temperatures, basic pHs, and inorganic metals inhibit their degradation. Chapter Three indicates the enhanced survivability of amino acids in environments that are expected on icy ocean moons, suggesting they may be prime targets for the search for life outside of Earth. Chapter 4 investigates whether the transition from liquid in the subsurface ocean to vacuum above the surface influences the relative abundances of biosignatures, as future missions will rely on the analysis of materials above the icy surfaces to determine whether they could be inhabited. Simulation of the liquid-vacuum transition indicated the distributions were sufficiently conserved to allow distinction between biological and abiotic sources. Finally, the green and sustainable recycling of plastic using Earth-abundant minerals has been investigated under hydrothermal conditions. The efficiency of plastic degradation was strongly influenced by its structure, where polymers with a C-C backbone degraded much slower under hydrothermal treatment compared to polymers containing a heteroatomic backbone. Furthermore, the presence of minerals selectively enhanced the degradation of heteroatomic plastics, highlighting the application of hydrothermal conversion as a green and sustainable alternative for pollutant recycling
Deep Learning for Segmentation of Intracranial Aneurysms on Time-of-Flight Magnetic Resonance Angiography
No full textPredicting Coronary Artery Calcium Using Abdominal Aorta and Visceral Artery Calcification
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