Category: K

  • Karvonen formula

    Method of calculating target training zone based on maximal heart rate and resting heart rate. A calculation of the optimal range of heart rate for achieving physical fitness during cardiovascular endurance exercise. Method of calculating the intensity target range for aerobic work using a percentage of the heart rate reserve.  

  • Kinetochores

    Large multiprotein complexes that bind the centromeres of the chromosomes to the microtubules of the mitotic spindle during metaphase in the cell cycle. A protein disk attached to the DNA of the centromere that connects a pair of chromatids during cell division. A spindle fiber is in turn attached to the kinetochore.  

  • Kinetic

    Pertaining to or producing motion. Relating to movement. Study of motion, including the forces producing and modifying motion.  

  • Killer cells

    Lymphocyte-like effector cells which mediate antibody-dependent cell cytotoxicity. They kill antibody-coated target cells which they bind with their Fc receptors. A type of immune cell that recognises and destroys cells that have specific antigens on their surface, e.g. virus-infected or cancerous cells.  

  • Ketosteroids

    Steroid derivatives formed by oxidation of a methyl group on the side chain or a methylene group in the ring skeleton to form a ketone. A steroid such as cortisone which contains a ketone groups. Steroids, a group of compounds that share a chemical resemblance to cholesterol, contain ketone groups attached to carbon atoms. When…

  • Ketoconazole

    Broad spectrum antifungal agent used for long periods at high doses, especially in immunosuppressed patients. A drug which is effective against a wide range of fungal infections such as cryptococcosis and thrush. An antifungal drug available as a tablet, a shampoo, and a cream. Ketoconazole (Nizoral), taken as a tablet, prevents the growth of fungus…

  • Kb

    A measure of the length of DNA fragments, 1 Kb = 1000 base pairs. The largest DNA fragments are up to 50 kilobases long.  

  • Knee root

    Knee root

    Breathing root or pneumatophore, where the horizontal root forms a loop that emerges at low tide. A root that protrudes above the ground, usually occurring in species that grow in waterlogged soils.  

  • Km

    Abbreviation for kilometre.  

  • Kleptotype

    (Stolen) fragment of type [unofficial term].