| non-ionic contrast media | <radiology> A class of radiographic contrast media which do not ionise in solution, thereby decreasing effective osmolarity and toxicity. (05 Mar 2000) |
|---|---|
| ionic | Relating to an ion. (05 Mar 2000) |
| ionic coupling | <chemistry> The same as electrical coupling. (18 Nov 1997) |
| ionic medication | 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) |
| ionic strength | Symbolised as g/2 or I and set equal to 0.5σmizi2, where mi equals the molar concentration and zi the charge of each ion present in solution; if molar concentrations (ci) are used instead of molality (and the solution is dilute), then I == 0.5(1/ρo)σcizi2 where ρo is the density of the solvent; a number of biochemically important events (e.g., protein solubility and rates of enzyme action) vary with the ionic strength of a solution. (05 Mar 2000) |
| activation product | <radiobiology> The unstable nucleus formed when activation occurs. (See activation above.) (09 Oct 1997) |
| by-product | <chemistry> A product of a chemical reaction or industrial process which is different from the desired product. (20 Mar 1998) |
| by-product material | Radioactive material produced by nuclear fission or by neutron irradiation in a nuclear reactor or similar device. (05 Mar 2000) |
| gene product | The biochemical material, either RNA or protein, resulting from expression of a gene. The amount of gene product is used to measure how active a gene is, abnormal amounts can be correlated with disease-causing alleles. (09 Oct 1997) |
| cleavage product | A substance resulting from the splitting of a molecule into two or more simpler molecules. (05 Mar 2000) |
| product | 1. Anything that is produced, whether as the result of generation, growth, labour, or thought, or by the operation of involuntary causes; as, the products of the season, or of the farm; the products of manufactures; the products of the brain. "There are the product Of those ill-mated marriages." (Milton) "These institutions are the products of enthusiasm." (Burke) 2. <mathematics> The number or sum obtained by adding one number or quantity to itself as many times as there are units in another number; the number resulting from the multiplication of two or more numbers; as, the product of the multiplication of 7 by 5 is 35. In general, the result of any kind of multiplication. See the Note under Multiplication. Synonym: Produce, production, fruit, result, effect, consequence, outcome, work, performance. Origin: L. Productus, p. Pr. Of producere. See Produce. Source: Websters Dictionary (01 Mar 1998) |
| product, gene | The RNA or protein that results from the expression of a gene. The amount of gene product is a measure of the degree of gene activity. (12 Dec 1998) |
| product inhibition | Inhibition of an enzyme activity by a product of the reaction catalyzed by that enzyme. (05 Mar 2000) |
| product labeling | Use of written, printed, or graphic materials upon or accompanying a product or its container or wrapper. It includes purpose, effect, description, directions, hazards, warnings, and other relevant information. (12 Dec 1998) |
| product line management | Management control systems for structuring health care delivery strategies around case types, as in drgs, or specific clinical services. (12 Dec 1998) |