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 9 of 9 for “"enzymatic reduction"”.
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Enantioselective enzymatic reduction of prochiral ketones in one-phase and two-phase systems
… specific substrate are used for in situ cofactor reduction. The kinetic characterization of the different ADH preparations and of a NAD- and a NADP-dependent MDH shows strong dependence of activity on the substrate, on reaction parameters like concentrations of buffer, substrate, and cofactor, on …
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The Stereochemistry and Mechanism of The Biosynthesis of Ent-Sandaracopimaradiene and Related Diterpenes
… (S)-Geranyl-geraniol-1-d was prepared by enzymatic reduction of geranyl-geranial-1-d with horse liver alcohol dehydrogenase and NAD('+) with ethanol as a proton source. Inspection of the vinyl region of the ('1)H NMR spectrum of sandaracopimaradiene biosynthesized from (S)-geranylgeranyl …
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Occurrence of pyruvate:ferredoxin oxidoreductase in Campylobacter, Wolinella, Helicobacter and Arcobacter species
… alternatively, it might be due to an enzymatic reduction of NAD by electrons from the reduced ferredoxin generated during the ferredoxin-linked pyruvate oxidoreductase reaction.
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Endocrine aspects of the genetics of mating behavior in the domestic fowl
… low cumulative number of completed matings. The enzymatic reduction of tetrazolium by Δ5,3β hydroxysteroid dehydrogenase was employed to identify the sites of steroid biosynthesis in developing embryos of all three lines. The histochemical procedure proved insufficiently precise for determining …
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Asymmetrische Synthese von Stigmolon und Untersuchungen zur asymmetrischen Synthese von (-)-Cytoxazon und Galbonolid A und B
… reaction pathway included as key steps an enzymatic reduction, Takai-, Wittig-, Stille- and ditin-Stille-reaction, an Enders-alkylation and a 1,2-addition using directing groups. So far two of the four stereogenic centers and all double bonds were combined in a ten-membered building block …
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Engineering novel tandem reactions using organometallic catalysts and (metallo)enzymes
… by a ruthenium catalyst with a regioselective enzymatic epoxidation. A 90% yield of a single epoxide could be obtained selectively from the cross metathesis of two alkenes, a reaction that would yield a maximum 64% yield if ran sequentially. The scope of this tandem reaction was later extended …
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Biocatalytic carbon nitrogen double bond reduction
Within this research project the bioreduction of imines and oximes has been investigated as possible promiscuous activity of two different reductases families, the enoate reductase family (EC 1.3.1.31) and the carbonyl reductase family (EC: 1.1.1.1). The decision of targeting these enzyme classes …
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Development of enzyme-catalysed resolution, desymmetrisation and cascade processes. Use of lipasas, alcohol dehydrogenases and transaminases in stereoslective synthesis
… Transaminases and Lipases; Development of a Chemoenzymatic Strategy Toward a Levofloxacin Precursor” (J. Org. Chem. 2016, 81, 9765-9774). En el Capítulo 2, se ha hecho uso de diversas transaminasas para llevar a cabo la biotransaminación de - y -cetoésteres y sintetizar los correspondientes …
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Myoglobin redox form stabilization: role of metabolic intermediates and NIR detection
… the relationship between metmyoglobin (MMb) reduction and oxidation of malate to α-ketoglutarate with regeneration of reduced nicotinamide adenine dinucleotide (NADH) via malate dehydrogenase (MDH). Our specific objectives for this experiment were: (1) to examine the interaction of malate and …