Category: O

  • Oxygenation index

    A measure of the efficiency of oxygen exchange by the lungs. The index is used in critical care medicine to assess the severity of acute lung injury and to gauge the effectiveness of ventilator management strategies. Mathematically it is represented as the product of the fractional concentration of inspired oxygen and the mean airway pressure,…

  • Oxychromatin

    The part of chromatin that stains readily with acid dyes.  

  • Oxychromatic

    Staining readily with acid dyes.  

  • Oxychloride

    A compound consisting of an element or radical combined with oxygen and chlorine or the hydroxyl radical and chlorine.  

  • Oxindole

    Natural derivatives of tryptophan that are present in high concentrations in the brains of patients with hepatic encephalopathy. Chemicals from this class have sedative and antioxidant effects. Some evidence suggests oxindoles may be useful in the treatment of Alzheimer’s dementia.  

  • Oxidoreductase

    An enzyme that catalyzes oxidation-reduction reactions.  

  • Oxidase

    A class of enzymes present in plant and animal cells that catalyzes an oxidation reaction; a respiratory enzyme.  

  • Oxazolidinone

    Any of a class of antibiotics effective against gram-positive organisms that inhibit the manufacture of bacterial proteins. An example is linezolid.  

  • Oxaloacetic acid

    A product of carbohydrate metabolism HOOC . CH2 . CO . COOH resulting from oxidation of malic acid during the Krebs cycle. May be derived from other sources.  

  • Oxalism

    Poisoning from oxalic acid or an oxalate.