Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An enzyme in certain microorganisms that catalyzes the hydrolysis or reduction of a substrate by molecular hydrogen.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any enzyme that catalyzes the formation of hydrogen, or the reversible oxidation of hydrogen.

from The Century Dictionary and Cyclopedia

  • n. A type of reducing ferment.

Etymologies

Sorry, no etymologies found.

Examples

  • Even more interesting, lately, in the last couple of weeks, people have seen that there's an enzyme called hydrogenase that's able to evolve hydrogen from proton and electrons.

    Janine Benyus shares nature's designs

  • During fermentation, hydrogen is released though the action of an enzyme called hydrogenase, powered by electrons generated by either the breakdown of organic compounds or the splitting of water by photosynthesis.

    EurekAlert! - Breaking News

  • By blocking and modifying some of these metabolic pathways, we may be able to augment the donation of electrons to hydrogenase under anaerobic conditions and produce elevated levels of hydrogen.

    New Possibilities For Hydrogen-producing Algae | Impact Lab

  • The bacteria consumed the sugar and produced hydrogen, which they make with the enzyme hydrogenase, and organic acids.

    - Boing Boing

  • The researchers concluded that it could be possible to close the oxygen pathways of hydrogenase through genetic modification of the protein and, thereby, increase the tolerance of hydrogenases to oxygen without disrupting the release of hydrogen gas.

    Illinois Scientists Create Computer Model of Enzymatic Hydrogen Production

  • Currently, the algae cells cycle between photosynthesis and hydrogen production because the hydrogenase enzyme which makes the hydrogen can’t function in the presence of oxygen.

    Mutant Algae Is Hydrogen Factory

  • A bigger challenge, and one that’s further down the road to solving, is improving the efficiency of the hydrogenase itself.

    Mutant Algae Is Hydrogen Factory

  • Photosynthesis is modulated by oxygen, and we have an oxygen-insensitive hydrogenase that we think will totally change this process.

    Craig Venter on DNA and the sea

  • And a team has now just been able to mimic that hydrogen-juggling hydrogenase.

    Janine Benyus shares nature's designs

  • Trouble is, the enzyme that propels the reaction hydrogenase stalls in the presence of oxygen, and – think back to high school bio – plants naturally produce oxygen during photosynthesis.

    The Newest Fuel – Genetically Enhanced Pond Scum | Impact Lab

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