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 11 of 11 for “"low oxygen levels"”.
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Hypoxia and the regulation of host responses to acute bacterial pulmonary infections
… hypoxaemia and bacterial colonisation with much lower acute mortality. The HIF/PHD pathway tightly regulates neutrophilic responses to hypoxia and bacteria. Here, using acute bacterial pneumonia models, I have dissected the differences in innate immune responses to infection in acute hypoxia and …
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Physical Processes that Affect Hypoxia in the Thames River Estuary, USA
… but the evolution and variability of the low-oxygen levels have not been effectively shown through prior observations. Developing a further understanding of these conditions may help explain seasonal ecosystem patterns in the Thames River and Long Island Sound. An observational program was …
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The Consequences of Disrupting The Mdm2-P53 Balance In Hematopoiesis
… turn stimulates the generation of more reactive oxygen species and depletes bone marrow cellularity. Also, p53 exerts various defects on the hematopoietic niche by increasing mesenchymal lineage populations and their differentiation. Hematopoietic defects are rescued with antioxidants or when …
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The Aerobic Metabolism and Behavior of the Burrow-dwelling Mantis Shrimp, HEMISQUILLA ENSIGERA CALIFORNIENSIS
… and at night. Metabolic rates, as a function of oxygen tension, were measured in respirometry chambers using polarographic oxygen electrodes.</p> <p>This species is a near complete oxyconformer, so aerobic metabolism is strongly depressed at low oxygen levels, yet the animals remained active …
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Faunal, sedimentological and geochemical indicators of dysoxia in Cretaceous marine sediments
… Although diverse criteria for the recognition of low oxygen levels have been described previously they have not been fully calibrated. This project compares palaeooxygenation related features of lower Cretaceous rocks from the shallow sea muds of the Gault Clay (south east England) and Niveau …
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Conditions Responsible For The Success Of Carnivorous Plants In Nutrient-Poor Wetlands
… plant species. I addressed the following three questions: (1) does niche complementarity promote coexistence between fire-adapted carnivorous and non-carnivorous species? (2) do carnivorous plants rely on both leaf traps and arbuscular mycorrhizal fungi to access different nutrients …
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MOLECULAR ASPECTS OF ENDOTHELIAL CELL FUNCTION AND HYPOXIA-DEPENDENT TUMOR ANGIOGENESIS
Hypoxia, or deficient oxygen levels, is an inherent feature of rapidly expanding tumor tissue. In order to survive in the hostile, hypoxic environment and to restore the supply of oxygen and nutrients tumor cells activate a variety of adaptive mechanisms. Among them, hypoxia-induced angiogenesis, …
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Lattice-mismatched epitaxy of AlInP and characterization of its microstructure and luminescence
… of AlxIn1-xP at a range of compositions with low threading dislocation densities (105-06/cm2) and low oxygen levels (2x1016/cm3). The high-quality of these films result in the first report of room-temperature yellow-green luminescence from AlxIn1-xP comparable in brightness to lattice-matched …
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An Investigation into the Vascular Phenotypes of Breast Patient- Derived Xenografts
… resulting in reduced blood perfusion and oxygen delivery, leading to hypoxia (low oxygen levels). Hypoxic tumours are more aggressive, therapy resistant and likely to metastasise, particularly in breast cancer. Equally, hypoxic tumours encourage the growth of new blood vessels from …
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Boosting Biodetection Signals via Photopolymerization: Strategies for Photocatalyst Amplification
… of eosin Y photoinitiation to understand oxygen consumption processes and identify inefficiencies during the photoinitiation, and then we developed liposome-enhanced PBA to increase the number of target-associated eosin Y per binding event. The knowledge gained from these studies allowed …
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The impact of global environmental changes on exceptional preservation, extinction, and recovery in the early Jurassic (late Pliensbachian-Toarcian)
… modern marine communities will respond to rising levels of atmospheric carbon dioxide and climate change, and the fossil record can provide critical information about how organisms withstood similar climate crises in the past. During the Early Jurassic there were significant perturbations in …