Liebermann-Burchard reaction
- Liebermann-Burchard reaction
Lie·ber·mann-Bur·chard reaction 'lē-bər-mən-'bu̇r-.kärt- n a test for unsaturated steroids (as cholesterol) and triterpenes based on the formation of a series of colors (as pink to blue to green) with acetic anhydride in the presence of concentrated sulfuric acid
called also Liebermann-Burchard test
Lie·ber·mann 'lē-bər-.män Carl Theodore (1842-1914)
German chemist. Liebermann is most famous for his work with fellow chemist Carl Graebe (1841-1927). Their work on artificial dyes gave considerable impetus to the development of the modern dye industry. Liebermann was the author of more than 350 scientific papers. He investigated quercetin and naphthalene compounds and prepared halogen and phenol derivatives. H. Burchard may have been one of his many student research assistants.
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see under test.
Medical dictionary.
2011.
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liebermann-burchard reaction — ˈlēbərmənˈbu̇(ə)rˌkärt noun Usage: usually capitalized L&B Etymology: after Karl T. Liebermann died 1914 German chemist and H. Burchard, 19th century German chemist : a test for unsaturated steroids (as cholesterol) and triterpenes based on the… … Useful english dictionary
Liebermann-Burchard test (reaction) — Lie·ber·mann Bur·chard test (reaction) (leґbər mahn burkґhahrd) [Carl Theodore Liebermann, German chemist, 1842–1914; H. Burchard, German chemist, 19th century] see under test … Medical dictionary
Réaction de Liebermann — La réaction de Liebermann Burchard est une réaction chimique principalement utilisée comme test révélateur du cholestérol et plus généralement des phénols. Elle a été décrite initialement par Carl Liebermann[1] puis appliquée à la révélation du… … Wikipédia en Français
reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… … Medical dictionary
Burchard — H., 19th century German chemist. See B. Liebermann reaction, Liebermann B. test … Medical dictionary
Liebermann — Leo von S., Hungarian physician, 1852–1926. See Burchard L. reaction, L. Burchard test … Medical dictionary
test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… … Medical dictionary
CHOLESTÉROL — Le cholestérol est une biomolécule très répandue chez la plupart des organismes animaux, mais absente des végétaux et des micro organismes. Le cholestérol est un solide blanc, cristallin, insoluble dans l’eau, soluble dans les liquides organiques … Encyclopédie Universelle
The Anglo-Saxon Church — The Anglo Saxon Church † Catholic Encyclopedia ► The Anglo Saxon Church I. ANGLO SAXON OCCUPATION OF BRITAIN The word Anglo Saxon is used as a collective name for those Teutonic settlers the foundation stock of the English race… … Catholic encyclopedia
