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  2. Dilution refrigerator - Wikipedia

    en.wikipedia.org/wiki/Dilution_refrigerator

    A 3 He/ 4 He dilution refrigerator is a cryogenic device that provides continuous cooling to temperatures as low as 2 mK, with no moving parts in the low-temperature region. [ 1 ] [ 2 ] The cooling power is provided by the heat of mixing of the helium-3 and helium-4 isotopes.

  3. Hyaluronidase - Wikipedia

    en.wikipedia.org/wiki/Hyaluronidase

    Four different purified hyaluronidases have been approved for use in the United States, three of animal origin and one recombinant. They are indicated as adjuvants in subcutaneous fluid administration for achieving hydration, for increasing the dispersion and absorption of other injected drugs, or for improving resorption of radiopaque agents, in subcutaneous urography.

  4. Auto-defrost - Wikipedia

    en.wikipedia.org/wiki/Auto-defrost

    While this technique was originally applied to the refrigerator compartment, it was later used for freezer compartment as well. A combined refrigerator/freezer which applies self-defrosting to the refrigerator compartment only is usually called "partial frost free" or semi-automatic defrost (some brands call these "Auto Defrost" while Frigidaire referred to their semi-automatic models as ...

  5. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    Food in a refrigerator with its door open. A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. [1]

  6. Hyaluronate lyase - Wikipedia

    en.wikipedia.org/wiki/Hyaluronate_lyase

    The enzyme hyaluronate lyase (EC 4.2.2.1) catalyzes the chemical reaction. Cleaves hyaluronate chains at a β-D-GalNAc-(1→4)-β-D-GlcA bond, ultimately breaking the polysaccharide down to 3-(4-deoxy-β-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine

  7. Hydrogenase - Wikipedia

    en.wikipedia.org/wiki/Hydrogenase

    Hydrogen oxidation is coupled to the reduction of electron acceptors such as oxygen, nitrate, ferric ion, sulfate, carbon dioxide (CO 2), and fumarate.On the other hand, proton reduction is coupled to the oxidation of electron donors such as ferredoxin (FNR), and serves to dispose excess electrons in cells (essential in pyruvate fermentation).

  8. Hylas - Wikipedia

    en.wikipedia.org/wiki/Hylas

    Hylas and nymphs from a mosaic in Roman Gaul (3rd century). In classical mythology, Hylas (Ancient Greek: Ὕλας, romanized: Hýlas) was a youth who served Heracles (Roman Hercules) as companion and servant.