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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 649 for “"CATALYTIC ACTIVITY"”.
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Catalytic Activity of Molybdenum-Dioxo Complexes
… the optimization of ideal reaction conditions. Catalytic activity was observed to be dependent on the ligand environment. The smaller electronically demanding ligand environment showed readily rapid reactivity for aromatic diols, but competitive side reactions and catalyst dimerization occurred. …
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Physical Properties and Catalytic Activity of Lanthanum-Cobaltate
Made available in DSpace on 2014-12-12T00:32:34Z (GMT). No. of bitstreams: 1 7317420.pdf: 3959237 bytes, checksum: 1973ea15ee3f314051d3670b3fd17b23 (MD5) Previous issue date: 1972
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The catalytic activity of anodic oxides on aluminum
… isopropanol over anodic oxides was studied. The catalytic activity of the anodic oxides prepared in phosphoric, sulfuric, and oxalic acid was compared to the activity of ν-Al₂O₃. The effect of various thermal treatments on the catalytic activity was examined. IR spectroscopy proved useful for the …
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Catalytic Activity of Tungsten-dioxo and Tungsten-diimido Complexes
… up-conversion to carbon chemicals. Homogeneous catalytic deoxygenation processes present an opportunity to access valuable carbon commodity chemicals from biomass derived polyols. This dissertation details the design, development, and synthesis of d0 dioxo-W(VI) complexes bearing a bulky …
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Synthesis of Chiral Vanadium Phosphonates and Their Catalytic Activity
… phosphonic acid. These materials were tested for catalytic activity in the asymmetric epoxidation of geraniol and cinnamyl alcohol.
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Exploration of the Structure and Catalytic Activity of Modified Platinum Substrates
… this type of technology; however, to maintain catalytic efficiency and purity, the platinum anode must be modified by another metal, altering the electronic and catalytic properties of the platinum favorable toward methanol or formic acid oxidation. Palladium is known to enhance the catalytic …
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Green Synthesis and Evaluation of Catalytic Activity of Sugar Capped Gold Nanoparticles
… was used as a model system to determine the catalytic reduction activity of various sugar capped GNPs, monosaccharides (fructose), disaccharide (sucrose) and trisaccharide (raffinose) GNPs. The effect of temperature and the size of ligand on catalytic activity was also evaluated at different …
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Synthesis, Activation and Catalytic Activity of N-Heterocyclic Carbene Bearing Palladium Catalysts
… (Suzuki- Miyaura, Buchwald-Hartwig) and related (catalytic dehalogenation, £-ketone arylation) reactions is also discussed. A comparison of the activity of a variety of (NHC)Pd complexes as pre-catalysts for cross-coupling reactions was carried out. The results indicate that the activation of …
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Impact of Neurodevelopmental Disorder-Associated Clinical Variants on the Catalytic Activity of KMT5B
… However, the impact of these variants on enzyme activity is unknown. In this work, we provide qualitative and quantitative evidence showing the differential impacts of four select clinical missense variants of KMT5B on its lysine methylation activity. Recombinant KMT5B was purified and used for …
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Preparation, Properties, and Catalytic Activity of Fluorous Phosphine Substituted Transition Metal Carbonyl Complexes
"Fluorous Biphasic Catalytic Systems are defined and introduced. The syntheses of perfluoroalkyl substituted tertiary phosphine compounds are examined in detail. Our approaches to the preparation and purification of the fluoroponytailed tertiary phosphines P(CH2CH2(CF2)5CF 3)3 and P(p-C6H4-CH …
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Understanding the catalytic activity of oxides through their electronic structure and surface chemistry
… In order to develop descriptors to improve catalytic activity, thus reducing material cost for commercial technologies, this work studies fundamental processes that occur on model catalyst systems. Electrochemical studies of epitaxial oxide thin films establish the intrinsic activity of …
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Interplay between electronic structure and catalytic activity in transition metal oxide model system
… Transition-metal oxides can exhibit high catalytic activity for oxygen electrochemical reactions, which can be used to improve efficiency and cost of these devices. Identifying a catalyst "design principle" that links material properties to the catalytic activity can accelerate the …
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Characterizing Conformational Dynamics and Catalytic Activity of Enzymes by Hydrogen-Deuterium Exchange Mass Spectrometry
… to monitor deuteration events concurrently with catalytic activity on the millisecond to second timescale. Native mass spectrometry enabled studies into binding affinity and monitoring of substrate inactivation on a measured time course. Ion mobility mass spectrometry (IM-MS) was used to provide …
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Synthesis And Characterization Of Size Controlled Transitionmetal Phosphide Nanoparticles And Their Hydrodesulfurization Catalytic Activity
… hydrodesulfurization (HDS). The size-dependent catalytic activity of these metal phosphides for hydrodesulfurization (HDS) remains unstudied because the traditional temperature programmed reduction (TPR) method used in catalyst preparation results in highly polydisperse particles. </p> <p> The …
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The effect of lubricant derived ash on the catalytic activity of diesel particulate filters
… the impact of ash accumulation on the catalytic activity of DPFs. The impact was measured experimentally by comparing the ability of two ash loaded DPF samples to promote several chemical reactions (most importantly soot oxidation) to the ability of a previously unused (clean) filter. …
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Alpha helix 7 of PabB functions in catalytic activity and subunit interaction in Escherichia coli.
Alpha helix 7 of PabB functions in catalytic activity and subunit interaction in Escherichia coli.
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Understanding and Controlling the Surface Chemistry of Oxides to Enhance Catalytic Activity at Elevated Temperatures
… of oxides is essential for maximizing their catalytic performance. Despite being of high importance and scientific interest, our current understanding of the surface chemistry of oxide catalysts remains limited. One of the reasons for this is that it is not trivial to investigate oxide …
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Studies of the Coordination Chemistry and Catalytic Activity of Rhodium and Ruthenium N-Heterocyclic Carbene Complexes
The side-on dioxygen adducts of N-heterocyclic carbene (NHC) containing rhodium complexes, [ClRh(IPr)2(O2)] and [ClRh(IMes)2(O2)], previously synthesized in our laboratories possess a square planar geometry and O-O bond lengths of 1.323(3) and 1.341(4) Å, respectively. Both of these attributes are …
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