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 63 for “"organic substrates"”.
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Copper Complexes Which Catalyze the Air Oxidation of Organic Substrates.
The oxidations of o-diphenols to corresponding o-quinones are known to be important reactions in some biological, industrial, and pollution studies. Proton magnetic resonance (pmr) and optical [visible (vis) and ultraviolet (uv)) spectroscopy are often the techniques of choice for studying the …
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(De)fluorination of Organic Substrates Mediated by Nontrigonal Phosphorus Triamide
… chemical, and physiological properties to organic compounds. Therefore, the number of industrially synthesized products containing fluorine has seen a substantial increase in recent decades. The strategies to access organofluorine compounds include two opposite approaches: 1) (nucleophilic, …
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Photocatalytic sustainable processes for the H2 production by photoreforming of green organic substrates [Processo fotocatalitico sostenibile per la produzione di H2 dal fotoreforming di substrati organici green]
… un semiconduttore) e un agente sacrificale organico derivato da materiali plastici o biomassa. Questo processo offre un modo per affrontare molteplici questioni attraverso un'unica reazione. In particolare, consente la produzione di idrogeno verde con la simultanea ossidazione fotocatalitica …
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Physiological studies of phototrophy and heterotrophy in two algae with contrasting nutritional characteristics, Pyrenomonas salina (Cryptophyceae) and Poterioochromonas malhamensis (Chrysophyceae)
The ability of algae to take up dissolved organic compounds is well documented for cultured and field populations yet the physiological mechanisms controlling this behavior are largely unknown. The effects of dissolved organic compound additions on the growth and photosynthetic apparatus were …
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Photoinitiated coupling of dienes and monoolefins with pentacarbonyliron
… mixtures results in C-C coupling of the two organic substrates, forming a six-carbon chain which is coordinated to the Fe (CO) 3 moiety in a 1-a,4-6-n3 fashion. Using various 1,3- dienes and monoolefins carrying methyl and carboalkoxy substituents, the wide applicability of this process is …
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Photochemistry of metalloporphyrins
… and sulfite in bacteria and in the oxidation of organic substrates by cytochrome P450 has prompted our current investigations into the photochemistry of several metalloporphyrin oxoanion complexes. The use of photochemistry with model systems in the laboratory opens new avenues for the direct …
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Mechanisms and Intermediates of Iron Bleomycin Catalyzed Oxidations
… compounds and mediate the oxidation of small organic substrates in vitro has been utilized in the design of mechanistic studies which probe the chemical mechanisms and reactive intermediates involved in iron bleomycin catalyzed oxidations.
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Synthesis, Structure and Properties of New Iodine Derivatives of Natural Aromatic Acids // Синтез, структура и свойства на нови йодопроизводни на природни ароматни киселини
Iodination reactions of organic substrates are one of the most significant chemical transformations in pharmaceutical synthesis. No less important are the reactions that use the already obtained iodine-substituted compounds for the synthesis of much more complex ones. In addition, in view of the …
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Community, structure, activity and ecophysiology of sulfate-reducing bacteria in deep tidal flat sediments
… may provide microbial communities with usable substrates. In this thesis sulfate-reducing bacteria (SRB) were shown to be highly abundant and metabolically active in down to 5 meters depth of a tidal sand flat (German Wadden Sea). The majority of the isolated and quantified SRB were members of …
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Controlling electronics for the formation of high valent uranium imido complexes
… towards a variety of small molecules and organic substrates will be highlighted.</p>
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Synthetic and catalytic studies of Group 11 N-heterocyclic carbene complexes
… and shown to react with a variety of unsaturated organic substrates. This complex reacts rapidly with CO2 to form CO and a copper(I) borate complex. The boryl complex may be regenerated by treatment of the borate complex with the bis(pinacolato)diboron, (pin)B-B(pin), giving the stable byproduct …
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Oxidative and initiated chemical vapor deposition for application to organic electronics
… conductors in 1977, the research area of "organic electronics" has grown dramatically. However, methods for forming thin films comprised solely of conductive polymers are limited by the rigid nature of the conjugated backbone. Neither spin casting from solution nor melt processing can be …
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Synthesis and Reactivity of Anthracene-Based Molecular Precursors for Low-Valent Boron Species
… to undergo cycloadditions with a number of organic substrates and efforts to expand both the scope of derivatives and reactivity are underway. The possibility to access species containing highly unstable boron-pnictogen triple bonds has also been explored via the synthesis of the azidoborane …
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ENHANCING SUSTAINABLE FEED PRODUCTION: UTILIZING AGRICULTURAL WASTES AS SUBSTRATES FOR BLACK SOLDIER FLY LARVAE CULTIVATION
… to their ability to grow on a wide variety of organic substrates, including agricultural byproducts, and convert them into nutrient-rich insect biomass. This research thesis comprises two independent studies aimed at utilizing two different organic substrates to cultivate BSFL. The first study …
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Studies of metaphosphate acids and metaphosphate anhydrides in aprotic media
… aqueous media. Protonation of imetaphosphates in organic media has resulted in six metaphosphate acids. X-ray diffraction studies display that the structural configurations of metaphosphate acids are dictated by strong hydrogen bonding interactions. As a consequence of anti-cooperative effect, …
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Enhancement of biodegradation of methanol and tertiary butyl alcohol in groundwater systems
Groundwater contamination with organic compounds, especially leaked or spilled fuels, is a serious and growing environmental problem which is difficult to remediate. Alcohol additives in gasoline present more urgent problems because of their relatively high mobility in the subsurface. This study …
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Nitrification and denitrification kinetics in the activated sludge process
… utilization of easily and slowly biodegradable organic substrates in an anoxic environment. These constants were shown to have no fundamental kinetic significance; they are only apparent constants, the result of kinetic reactions which, fortuitously, show little variation under normal …
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Eta5-pentamethylcyclopentadienyl ruthenium complexes containing sulfur ligands
… temperature reactions of [Cp*RuCl2]2 towards organic substrates, (i) [Me2NC(S)S]2 and (ii) [Et2NC(S)S]2, isopropylxanthic disulfide (iii) [iPrOC(S)S]2 and bis(thiophosphoryl)disulfide (iv) [(iPrO)2P(S)S]2 produced air-stable Cp*Ru(S2CNR2)Cl2 (R = Me, 2.1; R = Et, 2.2), Cp*Ru(S2COiPr)Cl2 (2.3) …
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Phosphinimide complexes of titanium: Synthesis and reactivity studies of a new family of organometallic compounds.
… system to effect stoichiometric and catalytic organic transformations. The first type of metal complex contained both a Cp and a phosphinimide ligand {CpTi[NPR3]} which, when combined, would sterically and electronically mimic the Cp2Ti family of compounds. The second type of complex was based …
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