| Adson forceps | A small thumb forceps with two teeth on one tip and one tooth on the other. (05 Mar 2000) |
|---|---|
| Adson manoeuvre | A test for thoracic outlet syndrome; the patient is seated, with head extended and turned to the side of the lesion; with deep inspiration there is a diminution or total loss of radial pulse on the affected side. Not all patients with a positive Adson's test have thoracic outlet syndrome. Synonym: Adson manoeuvre. (05 Mar 2000) |
| Adson's test | A test for thoracic outlet syndrome; the patient is seated, with head extended and turned to the side of the lesion; with deep inspiration there is a diminution or total loss of radial pulse on the affected side. Not all patients with a positive Adson's test have thoracic outlet syndrome. Synonym: Adson manoeuvre. (05 Mar 2000) |
| Adson, Alfred W | <person> U.S. Neurosurgeon, 1887-1951. See: Adson's test, Adson forceps, Adson manoeuvre, Brown-Adson forceps. (05 Mar 2000) |
| adsorb | <chemistry> Refers to the process of one material attracting and holding molecules of another substance to the surface of its molecules. (06 May 1997) |
| adsorbate | Any substance adsorbed. (05 Mar 2000) |
| adsorbent | 1. A substance that adsorbs, i.e., a solid substance endowed with the property of attaching other substances to its surface without any covalent bonding, e.g., activated charcoal. 2. An antigen or antibody used in immune adsorption. (05 Mar 2000) |
| adsorption | 1. <chemistry> The accumulation or concentration of molecules of a gas or liquid on a surface in contact with the gas or liquid, resulting in a relatively high concentration of the gas or solution at the surface. Note that the accumulating molecules do not actually penetrate the substance they are on. Compare: absorption. 2. <virology> The adhesion of a substance to an organic particle in a solution, for example the adhesion of a virus to a cell. Origin: L. Sorbere = to suck (10 May 1997) |
| adsorption chromatography | Chromatography in which separation of substances is achieved by the difference in degree of adsorption of the compounds to a stationary phase. (05 Mar 2000) |
| adsorption fermentation | <microbiology> (extractive fermentation) A fermentation technique in which products of the fermentation are removed from the broth by adsorption onto materials such as carbon or polymers. Generally, the preferred method of doing this is to circulate the fermenting broth through the adsorbent substrate, because the fermentation products are often toxic to the microbes. (06 May 1997) |
| adsorption theory of narcosis | That a drug becomes concentrated at the surface of the cell as a result of adsorption, and thus alters permeability and metabolism. (05 Mar 2000) |
| adsternal | Near or upon the sternum. (05 Mar 2000) |