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 137 for “"Redox potential"”.
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The Formal Redox Potential of the Permanganatemanganous System in Sulfuric Acid
Equilibrium constants of redox reactions, tho degree of completeness of respective reactions, activity coefficients of solutes, choice of reducing or oxidising agents to be used—those and many other problems in analytical chemistry can be calculated or predicted satisfactorily through a knowledge …
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Uncovering the Redox Potential of the Global Gene Regulatory Protein DksA in Borrelia burgdorferi
… by four cysteine residues, that may serve as a redox sensor of tick-borne reactive nitrogen species (RNS) and reactive oxygen species (ROS). These post-translational redox modifications would enable DksA to direct gene expression required for the completion of the enzootic cycle. The central …
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Stimuli-Responsive Polymer Systems that Respond to Redox Potential and pH for Controlled Drug Release
… translate physiological signals, such as pH and redox potential, at the tumor microenvironment into nanocarrier behaviors, like swelling, degradation, morphological change, and charge reversal. Stimuli-responsive nanocarriers exhibit better pharmacokinetic profiles with reduced premature cargo …
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The ferric leaching of pyrite
… iron to ferric iron, thus maintaining a high redox potential. In this thesis, the effect of the redox potential on the ferric leach rate was investigated by examining previously published data and by developing an experimental technique where dynamic redox potential measurements were used to …
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An investigation into the ferric leaching of chalcopyrite : a sub-process in the bioleaching of chalcopyrite
… the rate of ferric leaching at a constant redox potential, using the methodology developed by Kametani and Aoki (1985). Following this, chalcopyrite ferric leach experiments were conducted to obtain the redox potential range where chalcopyrite leaching occurs. The rate of chalcopyrite …
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The kinetics of ferrous iron oxidation by Leptospirillum-like bacteria in absence and in presence of pyrite and pyrite/arsenopyrite mixtures in continous and batch cultures
… process is followed by the off-gas analysis and redox potential of the solution. With the off-gas analysis the oxygen and carbon dioxide concentration in the incoming air and outcoming gas was measured and the ferrous iron concentration in the solution was derived with the redox potential. The …
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Correlation Analyses among Soil, Plant, and Environmental Variables and Greenhouse Gas Emissions from Furrow-irrigated Rice on a Silt-loam Soil
… (VWC), temperature, and oxidation-reduction (redox) potential. No research has been conducted to relate greenhouse gas (GHG) production to soil and plant properties or environmental factors under furrow-irrigated rice. The objective of this field study was to evaluate correlations between …
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Investigating novel bacterial laccases with biotechnologically relevant attributes
… in biotechnological fields due to their high-redox potential. However, they exhibit poorer activity in alkaline pH and high temperature conditions when compared to their lowredox bacterial counterparts. These discrepancies in oxidative abilities have been correlated to differences in axial …
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Concentration-Dependent Thermodynamics and Kinetics in Lithium-Metal Battery Electrolytes: Implications for Coulombic Efficiency
… facilitate significant upshifts in the Li redox potential and contribute to stable interphases and voltage profiles. Our findings reveal that the redox potential is primarily governed by the solvent’s electron-donating ability, reflecting underlying solvation dynamics, while the electrolyte …
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Two Methodologies in Pursuit of the Elucidation of Copper (II)—Centered Bioinorganic Chemistry
… usefulness of copper stems from its positive redox potential. This positive redox potential allows copper to assist in the movement of electrons. Copper ions can be found in natural systems as either CuI, CuII or CuIII in part due to this redox potential. While CuII -centered biochemistry has …
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Characterizing Factors That Influence Intracellular Thiol-Disulfide Equilibrium
… is to maintain proteins in their functional redox state while promoting redox processes required for cell growth.</p> <p>The first part of this thesis focuses on determining the role that the oxidoreductase human glutaredoxin 1(hGrx1) plays in reduction of the critical disulfide bond in human …
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Effects of storage on water treatment plant sludges
… the overlying supernatant liquor when sludge redox potential values decreased below +100 mV. Organic carbon also increased in the supernatant but to a lesser extent. Sludge dewatering characteristics as measured by specific resistance and capillary suction time were found to improve when …
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Characterizing Variable Flow Pathways And Geochemical History Of Seepage Under The Mississippi River Levee: 2011, 2015, And 2016 Floods
… MS, during the 2011 flood, demonstrated the potential for using aqueous geochemistry to differentiate sand boils forming at the end of deep and shallow flow pathways, though the study was limited to cation and trace metal analyses. Sampling during the 2015 and 2016 events for temperature, …
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A multi-disciplinary approach to the characterization of waterlogged burial environments : assessing the potential for the in situ preservation of organic archaeological remains
… burial environments and to assess their potential for the in situ preservation of organic archaeological remains. To characterise these environments, environmental parameters were monitored through the soil profile and integrated with a study of the composition and activity of the …
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Experimental investigations of isotopologue fractionation during microbial methanogenesis
… following hypothesis: hydrogen concentration and redox potential are important controlling factors of carbon (¹³C/¹²C) and hydrogen (D/H) isotope ratios as well as the abundance of methane clumped isotopologues ([delta]¹³CH₃D) during microbial methanogenesis. Chapter 2 uses batch and fed-batch …
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A Potentlometrie Study of Formal Redox Potentlals in the Zimmermann-Reinhardt Determination of Iron in an Ore
… object of this study is to determine the formal redox potential of the ferrous-ferric system at the end point of the Zimmerrnann-Reinhardt method of determining iron in an ore. | The potential is lowered somewhat more than the theoretical value because the activities of the ferrous and ferric …
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A value based approach to leach optimization at Rössing Uranium Limited
… non-optimal leach conditions such as prevailing redox potential, incomplete leaching within the normal residence time or galvanic hindrance. Specific focus was, therefore, placed on the effect of oxidation reduction potential (ORP) on uranium extraction and reagent consumption and the …
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Groundwater redox conditions at a petroleum contaminated site, Kuils River, South Africa : pathways for BTEX biodegradation
… field measurements of electrical conductivity, redox potential, and pH. The variation and distribution of these redox-sensitive groundwater constituents show that bioremediation via NO₃- reduction, Fe³+ reduction, and SO₄²- reduction (and possibly methanogenesis in the most reduced part of the …
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Interactions of small molecules with duplex DNA and lesion containing G-quadruplex DNA
<p>The low redox potential of guanines (G 1.29 V vs. NHE) compared to other nucleobases, makes them potentially susceptible to attack by exogenous and endogenous damaging species. This property of guanine has also been utilized for the development of several anticancer agents including the …
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Tritium transport, corrosion, and Fuel performance modeling in the Fluoride Salt-Cooled High-Temperature Reactor (FHR)
… TRIDENT integrates the effects of the chemical redox potential, tritium mass transfer, tritium diffusion through pipe walls, and selective Cr attack by tritium fluoride. Systems for capturing tritium from the coolant were proposed and simulated with TRIDENT. A large nickel permeation window …
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