| Kerr, Harry Hyland | <person> U.S. Surgeon, 1881-1963. See: Parker-Kerr suture. (05 Mar 2000) |
|---|---|
| keshan disease | Condition caused by deficiency of the essential mineral selenium. Keshan disease is a potentially fatal form of cardiomyopathy (disease of the heart muscle). It was first observed in keshan province in china and since has been found elsewhere (including new zealand and finland) in areas where the selenium level in the soil is low. (12 Dec 1998) |
| keslop | The stomach of a calf, prepared for rennet. Origin: AS.cselib, or cslyb, milk curdled; cf. G. Kaselab, kaselippe. See Cheese, and cf.Cheeselep. Source: Websters Dictionary (01 Mar 1998) |
| Kestenbaum | <person> U.S. Ophthalmologist, 1890-1961. See: Kestenbaum's sign, Kestenbaum's number. (05 Mar 2000) |
| Kestenbaum's number | The difference between the two pupil diameters when each eye is measured in bright light with the other eye tightly covered; an indicator of the relative afferent pupillary defect in patients with two normally innervated irises. (05 Mar 2000) |
| Kestenbaum's sign | <clinical sign> A decrease in the number of arterioles crossing optic disk margins as a sign of optic neuritis. (05 Mar 2000) |
| kestrel | <zoology> A small, slender European hawk (Falco alaudarius), allied to the sparrow hawk. Its colour is reddish fawn, streaked and spotted with white and black. Also called windhover and stannel. The name is also applied to other allied species. This word is often used in contempt, as of a mean kind of hawk. "Kites and kestrels have a resemblance with hawks." See: Castrel. Source: Websters Dictionary (01 Mar 1998) |
| ketal | RC(OR')(R')OR'';a hydrated ketone in which both hydroxyl groups are esterified with alcohols. (05 Mar 2000) |
| ketal pyruvate transferase | <enzyme> Involves the transfer of the pyruvyl residue from phosphoenolpyruvate to the external mannose of pentasaccharide diphosphate lipid Registry number: EC 2.3.1.- (26 Jun 1999) |
| ketamine | <chemical> A cyclohexanone derivative used as an intravenous anaesthetic. Ketamine produces a dissociative anaesthesia in which the patient is not asleep but does not respond appropriately to environmental stimuli, including pain. Upon revival, the patient does not remember what occurred under the influence of the drug. Its mechanism of action is not well understood, but ketamine can block nmda receptors (receptors, n-methyl-d-aspartate) and may interact with sigma receptors. Pharmacological action: anaesthetics, dissociative, excitatory amino acid antagonists. Chemical name: Cyclohexanone, 2-(2-chlorophenyl)-2-(methylamino)-, (+-)- (12 Dec 1998) |
| ketanserin | <chemical> A selective serotonin receptor antagonist with weak adrenergic receptor blocking properties. The drug is effective in lowering blood pressure in essential hypertension. It also inhibits platelet aggregation. It is well tolerated and is particularly effective in older patients. Pharmacological action: antihypertensive agents, platelet aggregation inhibitors, serotonin antagonists. Chemical name: 2,4(1H,3H)-Quinazolinedione, 3-(2-(4-(4-fluorobenzoyl)-1-piperidinyl)ethyl)- (12 Dec 1998) |
| ketene | CH2==C==O;a very reactive acetylating agent, used in chemical syntheses. (05 Mar 2000) |
| ketimine | R-N==C(R')(R'');a tautomer of an aldimine, formed in many enzyme-catalyze reactions; e.g., aminotransferases. (05 Mar 2000) |
| ketimine reductase | <enzyme> Reduces ketimines arising from the deamination of sulfur amino acids to the corresponding saturated 7 member thiazepine carboxylic acids Registry number: EC 1.5.1.- (26 Jun 1999) |
| ketine | <chemistry> One of a series of organic bases obtained by the reduction of certain isonitroso compounds of the ketones. In general they are unstable oily substances having a pungent aromatic odour. See: Ketone. Source: Websters Dictionary (01 Mar 1998) |