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Showing 1 to 10 of 10 for “"H2ase"”.
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Synthesis of redox-active ligands and their use in hydrogenase modeling
… uses the enzymatic system of hydrogenases (H2ases) to reversibly convert protons and electrons into H2. The two primary H2ases are the [FeFe] and [NiFe]-H2ases, aptly named for the metals present at the active sites. Both H2ases possess numerous unique features, including FeS cluster to …
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Incorporation of cyanide ligands into models of [FeFe]- and [NiFe]-hydrogenase
… hydrogen-bonding environments found in [FeFe]-H2ase by coordination of triarylboranes to the [FeFe]-H2ase models [Fe2(pdt)(CO)4(CN)2]2‒ and [Fe2(adt)(CO)4(CN)2]2‒. Treatment of two equivalents of borane to [Fe2(pdt)(CO)4(CN)2]2‒ formed the 2:1 adduct [Fe2(pdt)(CO)4(CNBR3)2]2‒. Attempts to model …
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Bioindicators of Reductive Dechlorination in a Dehalococcoides ethenogenes-Containing Mixed Culture: Transcriptional Trends With Respect to Substrate Type, Substrate Concentration, and Culture Operation
… reductive dehalogenase (RDase), hydrogenase (H2ase) and other oxidoreductase enzymes were selected for study as potential bioindicators of reductive dechlorination in DET. Quantitative reverse-transcriptase PCR (qRT-PCR) data on selected gene transcripts in batch PCE-fed microcosms indicated …
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Mixed-valence bimetallic dithiolates of iron, cobalt, and nickel and their relevance to the hydrogenases
… utilizes metalloproteins called hydrogenases (H2ases) to efficiently interconvert protons and electrons with dihydrogen. Though this is one of the simplest possible reactions, it is of utmost importance for countless microorganisms. The performance of these enzymes exceeds that of the leading …
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Synthesis, spectroscopy, and electrochemistry of hydrogenase mimics
Hydrogenases (H2ases) provide microorganisms with hydrogen to be used as fuel for processes such a methanogenesis. The reversible hydrogen evolution reaction (HER) is catalyzed by anaerobic bacteria to expel hydrogen as a byproduct of photosynthesis. Hydrogen does not accumulate in our atmosphere …
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Photoelectrochemical fuel synthesis using organic semiconductors with (bio)molecular catalysts
… electrodes, hosting the enzymes hydrogenase (H2ase) or formate dehydrogenase (FDH) for direct solar fuel synthesis. By co-immobilising carbonic anhydrase (CA), supported by simulations and spectroscopic investigations, the photobiocathodes generate unprecedented photocurrent densities of up to …
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Semi-biological domino catalysis using acetate- and propionate-producing microbes
… to electrochemically active hydrogenase (H2ase) enzymes immobilised on the surface of the electrode. This approach of employing an OPV|H2ase photocathode to deliver H2 in situ to C. ljungdahlii has not previously been demonstrated, and resulted in a maximum acetate concentration of 1.9 ± …
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Tailoring the redox enzyme-material interface for enhanced electro- and photocatalytic fuel synthesis
… photosynthetic systems. First, [NiFeSe]-H2ase and [W]-FDH from Desulfovibrio vulgaris Hildenborough (DvH) is immobilised on a range of charged and neutral self-assembled monolayer (SAM)-modified gold electrodes with varying hydrogen bond (H-bond) donor capabilities. The key factors …
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Hydrides in [FeFe]-hydrogenase model complexes
The student, Michaela Carlson, submitted this Dissertation for approval on 2018-04-17 at 10:07.
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Semi-Artificial Photoelectrochemistry through Perovskite Integration and Elucidation of the Local Environment
Semi-artificial photoelectrochemistry combines state-of-the-art semiconductors developed in the photovoltaic industry with highly selective and active biological catalysts evolved for specific fuel-forming reactions. The biohybrids combine the benefits of both photovoltaic and bioelectrochemical …