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 43 for “"Redox Chemistry"”.
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Investigating Subcellular Thiol Redox Chemistry With Gfp-Based Redox Sensors
… (GSH and GSSG), which serve as an intracellular redox buffer. In order to better understand the factors that influence mitochondrial GSH:GSSG balance, we used genetic engineering methods to target fluorescent protein-based redox sensors to the matrix and intermembrane space (IMS) of yeast …
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The roles of redox active cofactors in catalysis : structural studies of iron sulfur cluster and flavin dependent enzymes
… determined to aid in electron transfer and redox chemistry. However, additional activities for these cofactors continue to be discovered. The study of FAD in the context of rebeccamycin and staurosporine biosynthesis has yielded another role for this cofactor in the enzyme StaC. A homolog of …
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Redox Reactions of Aqueous Molybdenum(iv)
The redox chemistry of aqueous molybdenum(III), (IV), and (V) was investigated under a variety of conditions. Monomeric Mo(IV)(,aq), whether produced by the dissolution of "monomeric" Mo(IV) compounds in water or by the oxidation of Mo('3+), is unstable with respect to disproportionation. …
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Transuranic Imidophosphorane Chemistry
… helped to substantially cathodically shift the redox couples of the lanthanides, facilitating the isolation of these unique compounds. Herein, we present the expansion of this work to the actinides to study the molecular and electronic structures of transuranic imidophosphorane compounds. The …
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Controlling electronics for the formation of high valent uranium imido complexes
<p>Known primarily for its single electron chemistry, controlling the electronics at uranium to facilitate multi-electron processes remains a fundamental challenge in the actinide sciences. Our group has implemented the use of redox-active ligands to assist in the stabilization of low-valent …
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High-Intensity Shear as a Wet Sludge Disintegration Technology and a Mechanism for Floc Structure Analysis
… complete recovery. The role of iron and iron chemistry plays a critical role in the activated sludge. Iron apparently selectively removes protein, in particular material ranging in the 1.5 um to 30K size range. The addition of ferric iron was found to increase SVI and decrease zone-settling …
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Trigonal Based Copper Sites - A Natural Situation?
… flexibility are examined and systematised. Their redox properties have also been studied and correlated with their structure. <br></br><br></br> The main topic of this thesis concerns average valence dicopper cryptates. The synthesis has been studied in full including a description of likely …
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The Archean origin of assimilatory sulfate metabolisms provides novel insight into redox conditions of early Earth environments
… provide a complementary window into sulfur biogeochemistry with individual pathways having specific isotopic fractionations acting on distinct redox states (e.g. sulfate, sulfide, sulfite) for anabolism (Liu et al., 2012). An assimilation pathway exists, which starts with sulfate …
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Synthetic and Post-Synthetic Methods towards Fine Tuning the Chemical and Physical Properties of Metal-Organic Frameworks
… (MOFs), with a particular emphasis on modulating redox activity, framework composition, and ionic conductivity. The first part of the work focuses on leveraging MOF-embedded polynuclear metal clusters for multi-electron redox chemistry. A square-planar tetramanganese cluster was shown to …
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Redox-active ligand uranium complexes for approaches to multi-electron chemistry
… are known to participate in multi-electron redox chemistry to facilitate important organometallic transformations, actinides, due to their low redox potentials, have a propensity to perform single electron chemistry. Because of its highly reducing nature, the ability to control the …
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A molecular investigation of the antimicrobial functions of the human S100 host-defense proteins
… that the protein may exist in more than one redox state under physiological conditions, and that unlike CP and S100A12, the antimicrobial properties of S100A7 are not directly modulated by Ca(ll) ions. We report a model whereby the local redox environment of S100A7 tunes its …
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Site-selective Labeling of the Nitrogenase Iron-Molybdenum Cofactor
… of these enzymes, and in particular, the chemistry that occurs at the catalytic cofactor of the Mo nitrogenase, the iron- molybdenum cofactor (FeMo-co), has been studied for decades. A challenge in understanding its unique reactivity is knowing how the valence electrons of FeMo-co are …
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Developing hydrogen oxidation electrocatalysts using a frustrated Lewis pair approach
… and have found application in hydrogenation chemistry. In this thesis, the hydrogen-activating ability of FLPs is exploited for the development of new, metal-free electrocatalysts for hydrogen oxidation. In essence, this approach combines FLP hydrogen activation with the electrochemical …
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Model-Based Experimental Investigation of Hydrogenase-Like Electrocatalytic Inactivation and Activation Mechanisms
… the fundamentals and applications of the electrochemistry. Chapter 1 provides an overview of the electrode processes and the governing physical factors which may limit an electrolysis reaction. In Chapter 2, detailed simulation techniques are introduced to interpret an abstractive system into a …
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Linking microbes and climate : insights into the marine oxygen and nitrogen cycles with microbial metabolic functional types
… metabolisms as a function of their underlying redox chemistry and physiology. In Chapter 2, I use a simple model to predict the limiting oxygen concentration of aerobic microbial growth in an ecosystem. This limiting concentration is in the nanomolar range for much of the parameter space that …
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Dynamics and implications of ROS in marine systems
… across diverse marine ecosystems, influencing redox chemistry and organismal health. The distribution and concentration of these compounds in the oceans may serve as important controls for various biogeochemical cycles. The contrasting physiological nature of ROS, serving as both integral …
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Stabilizing Degenerate Dopants in Colloidal Semiconductor Nanocrystals
… tune the plasmon absorption band using redox chemistry, and demonstrate identical absorption bands in low-chalcocite copper-sulfide nanocrystals with and without cation vacancies. This work demonstrates that cation vacancies internal to the nanocrystal lattice are far more effective at …
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The application of colloidal photocatalysis in actinide photoredox chemistry
… explore the use of photocatalysis in metal ion redox chemistry leading to an assessment of its potential for application within nuclear reprocessing. Consequent to this, the scientific objective of this project is to identi& factors contributive to efficient photocatalytic metal ion valence …
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New insight into the coordination and reactivity of hetero-substituted maltol and method development for complex mixture analysis of asphaltene.
… In addition, new insights were gained into the redox chemistry of the thiomaltol and selenomaltol ligands, and the complexes of selenomaltol and thiomaltol were found to be more aromatic than the free ligand. The increased aromaticity of the complexes over the ligands was thought to be due to …
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