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 795 for “"O2"”.
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The Sodium-O2/Co2 Electrochemical Cell
… theoretical specific energy (3500Wh/kg for Li-O2 and 1600Wh/kg for Na-O2) and moderate equilibrium potential (2.96V for Li-O2 and 2.3V for Na-O2) make these chemistries attractive energy storage platforms for transportation, autonomous aircraft, and emergent robotics technologies. The term …
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Thermochemistry and kinetic analysis on radicals of acetaldehyde + O2, allyl radical + O2 and diethyl and chlorodiethyl sulfides
Thermochemical properties for reactants, intermediates, products and transition states important in the radicals of acetaldehyde + O_2 and allyl radical + O_2 reaction systems are analyzed with density functional and ab initic calculations, to evaluate the reaction paths and kinetics in oxidation …
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Kinetic Consequences of Surface Oxygen Species during Catalytic C3H6-O2, CO-O2, and COx-H2 Reactions on Transition Metal and Alloy Clusters
… oxygen species. For the first case of C3H6-O2 reactions, competitive epoxidation and combustion reactions occur on Ag clusters predominantly covered by O*. The desired epoxidation occurs via reactions between O* and C3H6. Contrarily, the undesired combustion to COx and H2O involves C-H bond …
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Development of advanced 3D tissue models and O2 imaging methodologies
… for these in vitro tissues combined with novel O2 and temperature nanoparticle probes. Here a new method for O2 sensing was introduced, measuring extracellular oxygenation using solid state polystyrene scaffold (AlvetexTM) impregnated with the phosphorescent dye PtTFPP. We accessed the toxicity, …
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Microfluidic H2/O2 fuel cells for contaminant and electrode analysis
… lifetime. We have used a microfluidic H2/O2 fuel cell as an analytical platform to determine the effects of the carbonate formation problem in alkaline fuel cells. The microfluidic fuel cell has modular components that can easily be swapped to test electrodes, electrolyte, or other aspects …
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Active site requirements for selective catalytic O2 reduction with H2
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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Large contribution of light-dependent oxygen uptake to global O2 cycling
… (Δ′17O = δ′17O - θ × δ′18O) of tropospheric O2 is an important parameter used in mass-balance proxy estimates of gross oxygen productivity in the modern ocean and the global biosphere. We created a chemical reaction network box model of the Δ′17O budget of tropospheric O2 to examine the key …
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Kinetic Decay of a Polymer/Ink Complex as an O2 Indicator
Indicator inks are an important part of the continued consumption of packaged goods. This thesis is focused on understanding the kinetics and reaction mechanism for a unique indicator ink that is based upon the oxidation of indigotetrasulfonate (ITS) encapsulated in the polyelectrolyte …
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Desenvolvimento de membranas de matriz mista para separação de O2/N2
The production of enriched and/or purified O2 is closely linked to energy and environmental aspects. So, one of technology alternatives to reduce O2 production cost are membranes for gas separation. But, to compete with conventional separation technologies, the development of new materials have …
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Funktion, Modifikation und Anwendung von O2-toleranten, NAD(P)+-reduzierenden [NiFe]-Hydrogenasen
… von R. eutropha in einer Atmosphäre aus H2, O2 und CO2 zu vermitteln. Die Funktionalität dieser Hybridtechnik ermöglicht die Anpassung der biochemischen Eigenschaften entsprechend der gewünschten Reaktionsbedingung durch geeignete Modulkombination. Beispielsweise kann die im Vergleich zur …
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N2, O2, and NF3 Dissociation in a Low Frequency, High Density Plasma Source
… with Ar actinometry for various mixes of N2, O2, and NF3 feed gases with Ar at 400 sccm total flow rate in a low frequency (400 kHz), high pressure (4.0 Torr), inductively-coupled toroidal remote plasma source from MKS Instruments, operating at a power density of 5 – 50 W/cm3. The dissociation …
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Atmospheric temperature soundings and precipitation cell parameter estimation using passive 118-GHz O2 observations
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.
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First principle study of Nax[TiyZnzMnw]O2 as a cathode material for sodium-ion batteries
… of Na intercalated electrode material NaxMnO2 electrode materials doped with Titanium (Ti) and Zinc (Zn) using random substitution doping method. The investigation was based on the effect of Na atom de-intercalation on the 2 X 1 X 1 NaxMn0.5Ti0.5O2 and 2 X 1 X 1 NaxMn 0.5Zn 0.5O2 supercells. …
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Exercise, arterial pressure control & systemic O2 tension : implications for post exercise hypotension in hypertension
This thesis presents four studies investigating the phenomenon of post exercise hypotension in the human condition of pre (borderline)-hypertension. Study one investigated the effects of an acute bout of 30-minutes upright cycling on post exercise haemodynamics and compared the results to a …
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Characterisation of new regulators and neural plasticity of the O2-sensing circuit in Caenorhabditis elegans
… stimulus that promotes aggregation and elicits O2- escape behaviour in C. elegans. It also constitutes a salient cue for this nematode that reprograms its behavioural strategies as well as physiology after prolonged oxygen experience. However, it is not known how other sensory modalities affect …
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