| ionizing radiation | Corpuscular (e.g., neutrons, electrons) or electromagnetic (e.g., gamma) radiation of sufficient energy to ionise the irradiated material. (05 Mar 2000) |
|---|---|
| ionogram | The result of ionography. (18 Nov 1997) |
| ionomycin | <chemical> A divalent calcium ionophore that is widely used as a tool to investigate the role of intracellular calcium in cellular processes. Pharmacological action: ionophores. Chemical name: Ionomycin (12 Dec 1998) |
| ionone | A cyclic ketone with an odour of violets or cedar wood, the a and b varieties of which differ in the location of the double bond in the ring: provitamins A and vitamin A have ionone configuration in the ring portion; alpha-carotene contains one alpha-and one beta-ionone moieties, beta-carotene contains two beta-ionone moieties, and gamma-carotene contains one beta-ionone moiety. (05 Mar 2000) |
| ionopherogram | <chemistry> The densitometric or colourimetric pattern obtained from filter paper or similar porous strips on which substances have been separated by electrophoresis; may also refer to the strips themselves. Synonym: electrophoretogram, ionogram, ionopherogram. (05 Mar 2000) |
| ionophore | <chemistry> A molecule that allows ions to cross lipid bilayers. There are two classes: carriers and channels. Carriers, like valinomycin, form cage like structures around specific ions, diffusing freely through the hydrophobic regions of the bilayer. Channels, like gramicidin, form continuous aqueous pores through the bilayer, allowing ions to diffuse through. See: ion channels. (18 Nov 1997) |
| ionophores | Chemical agents that increase the permeability of biological or artificial lipid membranes to specific ions. most ionophores are relatively small organic molecules that act as mobile carriers within membranes or coalesce to form ion permeable channels across membranes. Many are antibiotics, and many act as uncoupling agents by short-circuiting the proton gradient across mitochondrial membranes. (12 Dec 1998) |
| ionophoresis | Synonym: electrophoresis. Origin: ion + G. Phoresis, a carrying (05 Mar 2000) |
| ionophoretic | Relating to electrophoresis, as an electrophoretic separation. Synonym: ionophoretic. (05 Mar 2000) |
| ionosphere | <radiobiology> Ionised region of the upper earth atmosphere, which behaves like a plasma, including reflection of AM radio waves and generation of auroral glows. (09 Oct 1997) |
| ions | Atoms or radicals having a charge of positive (cation) or negative (anion) electricity owing to the loss (positive) or gain (negative) of one or more electrons. (12 Dec 1998) |
| iontophoresis | Movement of ions as a result of an applied electric field. For example the delivery of a charged molecule from the end of a micropipette without hydraulic flow. (18 Nov 1997) |
| iontophoretic | Relating to iontophoresis. (05 Mar 2000) |
| iontotherapy | Movement of ions as a result of an applied electric field. For example the delivery of a charged molecule from the end of a micropipette without hydraulic flow. (18 Nov 1997) |