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 906 for “"CH"”.
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Ab initio and Direct Quasiclassical Trajectory Study of the F + CH₄ → HF + CH₃ and F + C₂H₆ → HF + C₂H₅ Reactions
… and high level ab initio theory. We have chosen to create one set of new parameters that apply to two related reactions, F + CH₄ → HF + CH₃ and F + C₂H₆ → HF + C₂H₅. We have performed an electronic structure study for these reactions. The ab initio data obtained from the electronic …
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Laser surface modification of titanium alloys in CH₄/Ar atmospheres
Includes bibliographical references (pages 155-162).
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The Role of CH–π Interactions in Protein-Carbohydrate Binding
… ion coordination, and the less well-understood CH–π interactions. CH–π interactions are pervasive in protein-carbohydrate binding sites and have emerged as critical drivers of protein–carbohydrate recognition; however, the energetics of CH–π stacking interactions, their orientational landscapes, …
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Reactivity of Re₂(CH₃COO)₂Cl₄·2H₂O with purine DNA dinucleotides
… activity, and has resulted in intense research to understand the coordination of metal complexes to DNA. This investigation focuses on the formation of dirhenium metal:dinucleotide complexes of purine nucleobases. To our knowledge, complexes formed by the reaction of dinuclear rhenium metal …
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Investigations of the Non-Covalent CH-Π Interactions Using Molecular Torsional Balances
… balances were designed to study aliphatic CH-pi interactions and aromatic CH-pi interactions (edge-to-face arene-arene interactions). In each case, the geometries of the interactions were characterized in the solid-state via X-ray analysis, and the strengths of interactions were …
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Interfacial properties of CH₄/C₂H₆ gas hydrate particles with chemical additives
… of interconnected cages of water molecules, which can encapsulate guest (gas) molecules. Gas hydrates can form in subsea oil and gas flowlines operating at high pressures and low temperatures, which are the conditions that gas hydrates are thermodynamically stable. The formation, agglomeration, …
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CH-[pi] interactions play a central role in protein recognition of carbohydrates/
… hydrophilic and therefore present unique challenges in their recognition. One underappreciated force involved in carbohydrate-protein interactions is the CH-[pi] interaction, an attractive interaction between the aliphatic protons of a carbohydrate and the [pi] system of an aromatic ring. …
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Spatially Resolved Equivalence Ratio Measurements Using Tomographic Reconstruction of OH*/CH* Chemiluminescence
… ratio values to predict flame response. The technique of computed tomography for flame chemiluminescence emissions allows for 3D spatially resolved flame measurements to be acquired using a series of integral projections (camera images). High resolution tomography reconstructions require a …
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Experimental Study of the PVTX Properties of the System H₂O-CH₄
The system H₂O-CH₄ is found in a variety of geological environments in the earth’s crust, from sedimentary basins to low grade metamorphic terrains. Knowledge of the PressureVolume-Temperature-Composition (PVTX) properties of the H₂O-CH₄ system is necessary to understand the role that these fluids …
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Monte Carlo simulations of the CO₂/NaCl(001) and CH₃Br/LiF(001) systems
… the stable structures, phase coexistence and mechanism of nucleation and growth of films of CO$\sb2$ molecules adsorbed on the (001) surface of NaCl. This was done for submonolayer, monolayer, and multilayer coverages. The results show that the monolayer has two stable structures, a (2 x 1) …
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The synthesis of N-substituted ferrocenes and CH activation towards the synthesis of Organosilanols
… ortho-silylation of ferrocenyl oxazolines was achieved in poor to good yields and moderate to high diastereomeric ratios. To the best of our knowledge, this is the first catalytic and diastereoselective C–H activation on ferrocenes. After screening many other directing groups, only ferrocenyl …
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CH activation and CH2 double activation of indolines: towards the synthesis of aspidospermidine and aspidofractinine
… framework of aspidofractinine has proven more challenging, with only 5 total syntheses to date. These synthetic approaches are discussed in Chapter 1 together with the pharmacological activity exhibited within the Aspidosperma alkaloid series.<br/><br/>Chapter 3 details the challenges of …
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Early Plume Development and NOx Chemistry in LOx/H₂ and LOx/CH₄ Liquid Rocket Engines
Projected rocket launch demand in the next 10 years predicts an order-of-magnitude increase in CO₂-equivalent gasses. Despite this expected increase in launch frequency, the on-Earth environmental impacts of off-Earth missions is still understudied, partially due to the lack of combustion and …
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The Utility of the Test of Everyday Attention for Children (TEA-Ch) for Attention-Related Referrals
<p>The Test of Everyday Attention for Children (TEA-Ch) is a commonly used, UK-normed test to assess diverse attentional capacities in children and adolescents. Currently, there is insufficient evidence for the diagnostic utility of the TEA-Ch with ADHD in a U.S. population. The focus in this study …
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