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 48 for “"Intermediate species"”.
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Oxygen self-diffusion via a mobile intermediate species in rutile titania
… allows for facile injection of a mobile oxygen intermediate other than the doubly-charged oxygen vacancy. Characteristic exponential tail profiles coupled with the observation of a positive oxygen partial pressure dependence on isotopic oxygen diffusion in rutile suggests that the observed …
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Biophysical approaches to characterising protein-protein interactions and intermediate species in protein aggregation
… diseases are primarily composed of fibrillar species, intermediate oligomeric species that form during the aggregation process are believed to be a major cause of toxicity. Such species are relatively poorly characterised due to several challenges that render them inaccessible to most …
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Development and Application of in Situ/Operando Spectroscopic Techniques for Understanding Active Sites and Surface Intermediate Species in Heterogeneous Catalysis
… insights into catalyst structures, reaction intermediates, and mechanisms. This thesis presents the application of innovative methods, including in situ transient Raman spectroscopy, Differential Derivative Reflectance (DDR) UV-Vis Spectroscopy, Modulation Excitation Spectroscopy with …
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Heterogeneous decomposition of trimethylaluminum and trimethylgallium on silicon surfaces
… are identified through characterization of the intermediate species produced during decomposition. Carbon deposition is found to be an intrinsic part of the decomposition of TMAl and TMGa on silicon under the conditions used in this work.
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Optical combustion measurements of novel energetic materials in a heterogeneous shock tube
… burning time, ignition delay, and reaction intermediate species. The heterogeneous shock tube is a highly controlled experiment that provides explosive loading conditions during which measurements can be made on small scale samples in well known ambient conditions. This allows the …
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Isolation and Characterization of Reactive Heme -Oxygen Intermediates in Cytochrome P450 Catalysis
The P450 monooxygenases, and specifically the intermediate species formed within the course of their reaction cycle, are formidable oxidants, capable of a diverse range of chemical reactions. As the cryoradiolytic methodologies prove a convenient tool for the isolation and stabilization of …
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Enhanced Mineralization of Phenol and other Hydroxylated Compounds in a Photocatalytic Process assisted with Ferric Ions
… hydroxylated aromatics. Phenol and its aromatic intermediates are first considered in this research in the absence of Fe cations (unpromoted PC reaction) to elucidate the overall phenol kinetic reaction network. Based on experimental observations, the unpromoted PC reaction of phenol is …
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Spectroelectrochemical Studies of the Reductive Intermediates of Anthraquinone-2,6-Disulfonate in Aqueous Media
<p>Reactive intermediates in the reduction of anthraquinone-2,6-disulfonate (AQDS) by dithionite combine to form a transient dimer which has shown to give rise to a series of charge transfer bands in the visible range (600-750 nm). Additional wavelengths associated with these intermediate species …
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Electrochemical studies of lithium-oxygen reactions for lithium-air battery applications
… mechanisms and the contribution of soluble intermediate species to parasitic reactions in practical Li-air batteries.
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Mathematical Simulation of Direct Glucose Fuel Cell
… for mass transport of reactants, products and intermediate species, together with reaction kinetics and ohmic resistance effects in a Direct Glucose Fuel Cell system. It resulted in two sets (for anode and cathode) of first order nonlinear differential equations (derived from conservation …
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NMR Search for Mobile, Aluminum-bearing Species during Reactions of Sodium Alanate
… we have hypothesized a mobile Al- or Na- bearing intermediate species in the reaction scheme. <super>27<super>Al <italic>in situ<italic> NMR has been used to discover such a new species during dehydriding of NaAlH<sub>4<sub>. Importantly, the new species can also be formed under excess …
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SiC and B₄C as electrocatalyst support materials for low temperature fuel cells
… interaction influences surface adsorption of intermediate species. Electronic metal-support interactions between platinum and the carbide supports were observed which influenced the electrochemical characteristics of the catalyst, in some cases increasing the oxygen reduction reaction …
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Kinetic models for the Pt/CeO₂ catalysed water-gas shift reaction
… indicate that a dual-site mechanism with an intermediate species results in the best fit for reducible supports, while a single site mechanism offers a better fit for non-reducible supports. For both kinetic models, the formation of the intermediate species is most likely to be the rate …
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Oligomer dynamics for drug discovery against α-synuclein aggregation in Parkinson's disease
… aggregation may be linked to soluble oligomeric species that serve as precursors to mature fibrils. These intermediate species are transient, amorphous and highly heterogenous in solution, which has precluded the study of their population dynamics in the context of drug discovery and screening. …
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Mechanistic investigation of polyhydroxybutyrate (PHB) synthases and elucidation of PHB biosynthesis and degradation process in Wautersia eutropha H16
… formation. For the first time, we have observed intermediate species in the in vitro reaction containing a mutant Class III synthase, D302A-PhaCPhaEAv, with its natural substrate (R)-3-hydroxybutyryl-CoA (HB-CoA). Analysis of reaction products by SDS-PAGE gel, Westerns with PHA and PhaCPhaEAv …
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Development of constrained fuzzy logic for modeling biological regulatory networks and predicting contextual therapeutic effects
… with AND, OR, and NOT gates, but allows for intermediate species activities with mathematical functions relating input and output values (transfer functions). We first train a prior knowledge network (PKN) to data with cFL, which reveals what aspects of the dataset agree or disagree with …
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Heat Transfer and Combustion Characteristics of Nano-Sized Aluminum and Aluminum Oxide Utilizing Advanced Laser and Optical Diagnostics
… with minimal sample material (~ milligram). Intermediate species (e.g., AlO, Al, O, etc.) emissions from laser-induced plasma and combustion signals affirm exothermic reactions in the early stages, supporting the hypothesis that these reactions contribute to the increased shockwave velocity …
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The design, synthesis and mesomorphic properties of discotic liquid crystals
… iodination reactions to generate valuable intermediates, and the oxidative strategies and methods for the generation of hexasubstituted triphenylenes. These investigations have revealed that careful control over reaction conditions can offer great selectivity in the synthesis of halogenated …
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Understanding the Kinetics and Mechanisms of the Desired and Undesired Reactions during Electrochemical Hydrogenation and Hydrogenolysis of Furfural on Copper in Acidic Media
… renewable energy. Furfural is a biomass derived species that has been identified as a platform molecule. Electrochemical processes are more easily coupled with renewable electricity and can be used to valorize biomass derived species such as furfural. The installation of electrochemical processes …
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A tribo Marginellini Fleming, 1828 na costa brasileira (Mollusca, Gastropoda, Marginellidae)
… 1879 and Marginella Lamarck, 1799. The species of Eratoidea were referred to Dentimargo Cossmann, 1899, that has been confused with Stazzania Sacco, 1890. Yet, it was verified that Dentimargo is a fossil genus restricted to the Parisian Eocene, characterized by the high degree of …
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