| UDPglucuronic acid cyclase | <enzyme> Forms udpapiose plus carbon dioxide Registry number: EC 4.1.1.- Synonym: udpglucuronic carboxy-lyase (cleaving, cyclizing) (26 Jun 1999) |
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| UDPxylose | A pyrophosphate group links the 5' position of uridine and the 1-position of d-xylose; formed by the decarboxylation of UDPglucuronic acid; required for the synthesis of proteoglycans; inhibits UDPglucose dehydrogenase. (05 Mar 2000) |
| Uehlinger | E., Swiss pathologist, *1899. See: Meyenburg-Altherr-Uehlinger syndrome. (05 Mar 2000) |
| UFA | <abbreviation> Unesterified free fatty acid. (05 Mar 2000) |
| Uffelmann | Jules, German physician, 1837-1894. See: Uffelmann's reagent. (05 Mar 2000) |
| Uffelmann's reagent | To a 2% solution of phenol in water is added to aqueous ferric chloride until the solution becomes violet in colour; this turns lemon yellow in the presence of lactic acid, assumes an opaline tint in butyric acid, and is decolorised by hydrochloric acid. (05 Mar 2000) |
| ug | Symbol for microgram. (05 Mar 2000) |
| uganda | A republic in eastern africa, south of sudan and east of kenya. Its capital is kampala. In 1894 it was formally proclaimed a british protectorate but became independent in 1966. Its name is swahili, u, land + ganda, the name of its indigenous people, the land of the ganda. The origin of their name is unknown. (12 Dec 1998) |
| UGI | <abbreviation> Upper gastrointestinal series. (05 Mar 2000) |
| ugrian | <ethnology> A Mongolian race, ancestors of the Finns. Alternative forms: Uigrian. Source: Websters Dictionary (01 Mar 1998) |
| Uhl | Henry S.M., S. Internist, *1921. See: Uhl anomaly. (05 Mar 2000) |
| Uhl anomaly | Right ventricular myocardial aplasia, causing a dilated, thin-walled right ventricle without murmurs; death results in early childhood. (05 Mar 2000) |
| uhl disease | <radiology> Parchment right ventricle, focal or complete absence of RV myocardium (12 Dec 1998) |
| Uhthoff | Wilhelm, German ophthalmologist, 1853-1927. See: Uhthoff's sign, Uhthoff symptom. (05 Mar 2000) |
| Uhthoff symptom | A transient temperature-dependent numbness, weakness, or loss of vision. Conduction stops in any nerve if the temperature gets too high. In a damaged nerve, e.g., by demyelinization, this shutdown temperature is lowered, and may approach normal body temperature. Transient neurological dysfunction may then appear with a hot shower, exercise, or fever. Synonym: Uhthoff syndrome. (05 Mar 2000) |