| ketoheptose | A seven-carbon sugar possessing a ketone group. Synonym: heptulose. (05 Mar 2000) |
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| ketohexose | A six-carbon sugar possessing a ketone group; e.g., fructose. Synonym: hexulose. (05 Mar 2000) |
| ketohydroxyestrin | <chemical> 3-hydroxyestra-1,3,5(10)-trien-17-one. A metabolite of estradiol but possessing less biological activity. It is found in the urine of pregnant women and mares, in the human placenta, and in the urine of bulls and stallions. According to the fourth annual report on carcinogens (ntp 85-002, 1985), estrone may reasonably be anticipated to be a carcinogen (merck, 11th ed). Chemical name: Estra-1,3,5(10)-trien-17-one, 3-hydroxy- (12 Dec 1998) |
| ketol | <chemistry> One of a series of series of complex nitrogenous substances, represented by methyl ketol and related to indol. Methyl ketol, a weak organic base, obtained as a white crystalline substance having the odour of faeces. Source: Websters Dictionary (01 Mar 1998) |
| ketol-acid reductoisomerase | <enzyme> Dihydroxyisovalerate dehydrogenase (isomerizing) was classified as EC 1.1.1.89 (72-75) Registry number: EC 1.1.1.86 Synonym: isomeroreductase, hydroxyacid reductoisomerase, dihydroxyisovalerate dehydrogenase (isomerizing), alpha-acetohydroxyacid isomeroreductase, acetohydroxy acid isomeroreductase (26 Jun 1999) |
| ketole | 1. 2,3-Benzopyrrole;basis of many biologically active substances (e.g., serotonin, tryptophan); formed in degradation of tryptophan. Synonym: ketole. 2. Any of many alkaloids containing the indole structure. (05 Mar 2000) |
| ketole group | Carbons 1 and 2 of a 2-ketose (HOCH2CO-); trans-ketolation from d-xylose 5-phosphate to C-1 of aldoses is important in various metabolic pathways involving carbohydrates (e.g., photosynthesis, Dickens shunt); the two-carbon unit is transferred as a,beta-dihydroxyethyl thiamin pyrophosphate. (05 Mar 2000) |
| ketolytic | Causing the dissolution of ketone or acetone substances, referring usually to oxidation products of glucose and allied substances. (05 Mar 2000) |
| ketonaemia | <biochemistry> Medical term describing the condition of having excess ketone bodies in the bloodstream. Origin: Gr. Haima = blood (09 Oct 1997) |
| ketone | <biochemistry> A byproduct of fat metabolism. An overabundance of ketones in the bloodstream is seen in a severe metabolic derangement known as diabetic ketoacidosis. (27 Sep 1997) |
| ketone alcohol | A compound containing a carbonyl or ketone group as well as a hydroxyl group; e.g., dihydroxyacetone. (05 Mar 2000) |
| ketone bodies | The substances beta-hydroxybutyric acid, acetoacetic acid, and acetone, which are produced by fatty acid and carbohydrate metabolism in the liver in approximately a 78:20:2 ratio. Acetoacetate is produced from acetyl-CoA. most is enzymatically converted to beta-ketobutyrate, but a small amount is spontaneously decarboxylated to acetone. The ketone bodies can be used as fuels by muscle and brain tissue. In starvation and uncontrolled diabetes mellitus, large quantities are produced, causing metabolic acidosis and elevated blood and urine levels of all three ketone bodies. (12 Dec 1998) |
| ketone body | <biochemistry> Any of the three compounds created by acetyl coenzyme A (acetoacetate, hydroxybutyrate, and acetone) which are water-soluble cellular fuels normally exported by the liver. They can build up in the blood and body tissues because of starvation, untreated diabetes mellitus, or other disorders that interfere with carbohydrate metabolism. The body rids itself of ketones mainly through urine, but it rids itself of acetone through the lungs, which gives the breath a characteristic fruity odour. If ketones build up in the body long enough, they cause serious illness and coma (see ketoacidosis.) (09 Oct 1997) |
| ketone oxidoreductases | <enzyme> Registry number: EC 1.2. (12 Dec 1998) |
| ketone-aldehyde mutase | <enzyme> An enzyme that catalyses the interconversion of methylglyoxal and lactate, with glutathione serving as a coenzyme. Chemical name: S-Lactoyl-glutathione methylglyoxal-lyase (isomerizing) Registry number: EC 4.4.1.5 (12 Dec 1998) |
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| Kehr's sign |
severe pain in the left shoulder in some cases of rupture of the spleen.
Ãâó: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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| Kernig's sign |
a sign of meningitis: the patient can easily and completely extend the leg when in dorsal decubitus position but not when in the sitting posture or when lying with the thigh flexed upon the abdomen.
Ãâó: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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| Keen's sign |
increased diameter of the leg at the malleoli in Pott's fracture of the fibula.
Ãâó: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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| Kellock's sign |
increase of the vibration of the ribs on sharp percussion with the right hand, the left hand being placed firmly on the thorax under the nipple; a sign of pleural effusion.
Ãâó: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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| Kerandel's sign |
deep hyperesthesia accompanied by pain, often retarded, after some slight blow upon a bony projection of the body; seen in African trypanosomiasis.
Ãâó: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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| KE | a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair feathers nails and hooves |
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| KE | organic process by which keratin is deposited in cells and the cells become horny (as in nails and hair) |
| KE | become horny and impregnated with keratin |
| KE | convert into keratin |
| KE | organic process by which keratin is deposited in cells and the cells become horny (as in nails and hair) |
| KE | become horny and impregnated with keratin |
| KE | convert into keratin |
| KE | inflammation of the cornea causing watery painful eyes and blurred vision |
| KE | skin tumor that grows rapidly (especially in older people) and resembles a carcinoma but does not spread |
| KE | hernia of the cornea |
| KE | inflammation of the cornea and conjunctiva |
| KE | abnormal cone-shaped protrusion of the cornea of the eye |
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