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 131 for “"Redox reactions"”.
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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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Substitution and redox reactions of heptarhenium cluster derivatives
The second-order rate constants for the reactivity of (Re$\sb7$C(CO)$\sb{21}$Rh(CO)$\sb2$) $\sp{2-}$ towards phosphorus donors were determined. In order to correlate the results to electronic and/or steric effects, steric profiles relating log k$\sb2$ to an intrinsic reactivity $(\alpha),$ an …
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Synthesis and internal redox reactions of oximic and nitroso complexes
… the complex Fe(cup)3 underwent an internal redox reaction. Internal redox behaviour was also observed when the complexes Cu(cup)2 and Fe(cup)3 were treated with triphenylphosphine. On the basis of the nature of the products arising from these reactions and from a kinetic study of the …
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Studies of 1,2-quinone mono-oximato complexes and their redox reactions
The synthesis of the complexes Cr(1-nqo)3, Cr(2-nqo)3, Cr(3-Me-5-OHqo)3, Cr(6-Me-5-OHqo)3, Mn(1-nqo)3, Mn(2-nqo)3, Mn(1-nqo)2, and Mn(2-nqo)2, has been systematically examined.
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Thermodynamic and activation parameters of redox reactions of transition metal coordination compounds
Contains fulltext : mmubn000001_027597504.pdf (Publisher’s version ) (Open Access)
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Chemistry of tetravalent plutonium and zirconium : hydrolysis, solubility, colloid formation and redox reactions
… using several complementary methods and the redox behavior of plutonium is investigated in acidic conditions as well. The solubilities of Pu(IV) and Zr(IV) are determined from the onset of colloid formation as a function of pH and metal concentration using LIBD (laser-induced breakdown …
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Nanostructures templated on biological scaffolds for light harvesting, energy transfer, charge transfer, and redox reactions
… on energy and charge transfers, and related redox reactions. Genetically modified M13 viruses are explored as biological scaffolds to guide the formation of metal oxide catalysts-pigments hybrid nanostructures that enable efficient transports of both energy and electrons for photochemical …
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Solar thermochemical conversion of CO2 into fuels using Ni-Ferrite driven redox reactions: Thermodynamic efficiency analysis
… performance of nickel ferrite (NiFe2O4) as a redox material in solar thermochemical CO₂ splitting processes. To evaluate how different factors influence the efficiency of this process, a detailed thermodynamic model was created. This model looks at how variations in inert gas flow rates and …
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Thermodynamic evaluation of cobalt-ferrite based redox reactions for solar thermochemical conversion of CO2 into fuels
… the use of cobalt ferrite (CoFe₂O₄) as a redox-active metal oxide for two step solar thermochemical CO₂ splitting to produce carbon monoxide, a key component of syngas. Analysis showed that increasing εgg from 0.0 to 0.95, consistently strengthened heat recovery in the inert‑gas and oxygen …
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Redox Reactions Influencing Lead Concentrations in Drinking Water: Formation and Dissolution of Lead(IV) Oxide and Impact of Galvanic Corrosion
<p>Two approaches have been used to mitigate lead release to drinking water are optimizing water chemistry to form stable lead corrosion products and replacing lead service lines with lead-free materials. The present study investigated the effects of water chemistry on the formation and dissolution …
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Antimony isotopes as indicators of redox reactions in aqueous systems: fractionation during Sb(V) reduction by sulfide and isotope exchange kinetics between dissolved Sb(III) and Sb(V)
… detection of environmentally critical chemical reactions (e.g., Wiederhold 2015). We seek to develop Sb isotopic ratios as tools for detecting and quantifying Sb in the environment. Currently, processes that generate shifts in 123Sb/121Sb are not well studied, though they can be inferred from …
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Heterogeneous Redox Chemistries in Layered Oxide Materials for Lithium-Ion Batteries
… oxide materials' performance. A heterogeneous redox reaction is a dominant fading mechanism, which limits the utilization percentage of a battery materials' redox capability and leads to adverse effects such as detrimental interfacial reactions, lattice oxygen release, and chemomechanical …
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The drivers of freshwater reservoir biogeochemical cycling and greenhouse gas emissions in a changing world
… in DO. The availability of DO controls alternate redox reactions in freshwaters, thereby determining the rate and end products of organic C mineralization, which include two greenhouse gases, carbon dioxide (CO2) and methane (CH4). I performed ecosystem-level DO manipulations and evaluated how …
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Electrochemical Analysis of Oxidation of Primary Amines to Ketones with 3,5-Di-Tert-Butyl-1,2Benzoquinone
… have been used extensively to study electrode reactions and the coupled chemical-electrochemical reactions. Moreover, the concentration of redox active species in many of the redox reactions can be measured electrochemically, enabling the study of the chemical redox reactions by electrochemical …
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Coupled Biogeochemical Cycles of Iron and Organic Carbon in Soils
… affinity of iron (Fe) minerals for OC, the redox reactions of Fe potentially play an important role in regulating the stability and transformation of OC in soils. Fate of Fe-bound OC in natural soils upon Fe redox reactions is a critical knowledge gap for understanding the coupled …
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Grade 12 students conceptual understanding of chemical reactions: a case study of flouridation
… understanding of chemical reaction, particularly redox reactions.
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Application of Chemical Looping for Solar Thermal Energy Storage
… storage media, through reduction and oxidation (RedOx) reactions. The RedOx reactions of multivalent metal oxides are based on Le Chatelier’s principle in which the spontaneous shift for rebalancing the reaction can be brought on by changing the temperature and/or pressure of the system. …
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Microbial Diversity and Geochemical Energy Sources of Tutum Bay, Ambitle Island, Papua New Guinea, an Arsenic-Rich, Shallow-Sea Hydrothermal System
… Bay microorganisms might play in mediating As-redox reactions, three approaches were used: analyzing the geochemical environment for energy sources, characterizing the archaeal community composition of the sediments, and conducting culture-dependent As-cycling experiments. The second chapter of …
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Computer modelling of the chemical speciation in seawater
… controlling dissolution, precipitation, redox levels and coordinative interactions in surface seawater. In order to accomplish this task a relatively extensive database consisting of about 580 complexation equilibria arising from 32 inorganic and 10 organic components has been set up. …
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The preventive and therapeutic effects of molecular Hydrogen
… that is enough neither to disturb metabolic redox reactions nor to affect ROS, which function in cell signaling. This thesis reviewed the development of hydrogen in therapy, which includes its characteristic, production, possible underlying mechanisms and therapeutic applications. However, …
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