| dehalogenase | Any enzyme (EC subclass 3.8) removing halogen atoms from organic halides. (05 Mar 2000) |
|---|---|
| Dehio's test | If an injection of atropine relieves bradycardia, the condition is due to action of the vagus; if it does not, the condition may be due to an affection of the heart itself. Synonym: atropine test. (05 Mar 2000) |
| Dehio, Karl | <person> Russian physician, 1851-1927. See: Dehio's test. (05 Mar 2000) |
| dehiscence | A premature bursting open or splitting along natural or surgical suture lines. A complication of surgery that occurs secondary to poor wound healing. Risk factors include diabetes, advanced age, obesity and trauma during the post-surgical period. (27 Sep 1997) |
| dehiscent | Breaking open at maturity to release the contents. (09 Oct 1997) |
| dehumanization | Loss of human characteristics; brutalization by either mental or physical means; stripping one of self-esteem. Origin: de-+ humanus, human, fr. Homo, man (05 Mar 2000) |
| dehydrase | Former name for dehydratase. (05 Mar 2000) |
| dehydratase | A subclass (EC 4.2.1) of lyases (hydro-lyases) that remove H and OH as H2O from a substrate, leaving a double bond, or add a group to a double bond by the elimination of water from two substances to form a third; synthase is sometimes used when the synthetic aspect of the reaction is emphasized. Some trivial names of enzymes in this subclass bear the generic term hydratase, emphasizing the reverse reaction. (05 Mar 2000) |
| dehydrate | <chemistry> To deprive of water; to render free from water; as, to dehydrate alcohol. Source: Websters Dictionary (01 Mar 1998) |
| dehydrated | A condition of decreased body fluid. Common in cases of excess diarrhoea, vomiting or poor fluid intake. Some medications (diuretics) can also cause dehydration. Features include decreased urine output, thirst, dry mouth, dry skin, rapid heart rate and lightheadedness (particularly with standing). More severe cases may include confusion or a decreased level of consciousness. Features of dehydration in infants include decreased urine output, lethargy, listlessness, dry mouth and skin and failure to cry tears. (27 Sep 1997) |
| dehydrated alcohol | Water having been removed. Synonym: anhydrous alcohol. (05 Mar 2000) |
| dehydration | The condition that results from excessive loss of body water. Synonym: anhydration, deaquation, hypohydration. Origin: L. De = away, Gr. Hydor = water (18 Nov 1997) |
| dehydration fever | An elevation of temperature in infants after reduction of fluid intake, diarrhoea, or vomiting; probably caused by reduced available body water, with reduced heat loss by evaporation; an analogous condition in adults is seen when exertion is continued in the face of dehydration. Synonym: dehydration fever, exsiccation fever, inanition fever. (05 Mar 2000) |
| dehydration-condensation reaction | The joining of two molecules to each other with the release of a water molecule in the process. Compare: hydrolysis. (09 Oct 1997) |
| dehydrin | <protein> Class of plant proteins expressed in response to water shortage and notable for a run of 7 contiguous serines. (18 Nov 1997) |