Search for dissertations about: "active-sites"
Showing result 16 - 20 of 120 swedish dissertations containing the word active-sites.
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16. Quantum Chemical Modeling of Enzymatic Methyl Transfer Reactions
Abstract : In this thesis, quantum chemistry, in particular the B3LYP density functional method, is used to investigate a number of methyl transfer enzymes. Quantum chemical methodology is today a very important tool in the elucidation of properties and reaction mechanisms of enzyme active sites. READ MORE
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17. Experimental and kinetic studies of H2 effect on lean exhaust aftertreatment processes: HC-SCR and DOC
Abstract : With a growing concern to lower greenhouse gas emissions from road transportation, lean burn and diesel engines will keep playing an important role in the future. Development of a highly efficient and durable process to reduce NOx to N2 becomes a challenging issue especially in the presence of ample O2 concentration as in lean burn exhaust. READ MORE
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18. Structural biology of carbohydrate transfer and modification in natural product biosynthesis
Abstract : Certain organisms, can during periods of limited resources, adapt their metabolism to enable biosynthesis of secondary metabolites, compounds that increase competitiveness and chances of survival. The subjects of this thesis are enzymes acting on carbohydrate substrates during secondary metabolism. READ MORE
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19. Hydrolytic and oxidative catalytic activities of bio-inspired dinuclear metal complexes
Abstract : A number of homo- and heterodinuclear complexes have been synthesized as structural and functional models for the the active sites of phosphoesterases and soluble methane monooxygenases. The complexes are based on four new dinucleating ligands containing a central, potentially bridging, phenolate moiety. READ MORE
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20. Atom and Group Transfer Reactions Involving High-valent Iron Complexes
Abstract : Iron enzymes play critical roles in biological oxidation reactions by utilizing highly reactive high-valent iron intermediates, such as FeIV=O, FeV(O)(OH), and FeIV=NR species, for catalytic reactions. These intermediates exhibit remarkable catalytic behavior with high reactivities and high regio- and stereospecificity in various biochemical reactions. READ MORE