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单词 suprasterol
释义

suprasteroln.

Brit. /ˌsuːprəˈstɪərɒl/, /ˌsuːprəˈstɛrɒl/, /ˌsjuːprəˈstɪərɒl/, /ˌsjuːprəˈstɛrɒl/, U.S. /ˌsuprəˈstɛrɑl/, /ˌsuprəˈstɪrɑl/
Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: supra- prefix, -sterol suffix.
Etymology: < supra- prefix + -sterol suffix, after German Suprasterin (A. Windaus et al. 1930, in Ann. der Chem. 473 20); so called on account of the deliberately prolonged irradiation used to prepare the compounds.
Biochemistry.
Either of two isomeric polycyclic compounds ( suprasterol I, suprasterol II), produced by prolonged ultraviolet irradiation of calciferol (vitamin D2).Formula: C28H44O.
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the world > matter > chemistry > organic chemistry > alcohols > [noun] > steroid alcohols > sterols > named
cinchol1885
cholesterol1894
phytosterol1898
sitosterol1898
stigmasterol1907
lanosterol1929
suprasterol1930
lumisterol1932
tachysterol1933
1930 Brit. Chem. Abstr. A. 1577/2 Suprasterol I alters gradually when exposed to air and is unaltered by further irradiation... Suprasterol II gives a crystalline dihydro-derivative when reduced catalytically.
1943 Endeavour Apr. 73/2 Calciferol itself [vitamin D] was also liable to be broken down further to inactive substances—toxisterol and suprasterols I and II.
1976 H. Campion et al. in B. E. C. Nordin Calcium, Phosphate & Magnesium Metabolism xii. 449 D. Windaus et al. (1932) postulated the first scheme of ergosterol irradiation: Ergosterol → lumisterol → tachysterol → (ergo)calciferol, its further irradiation leading to suprasterol.
2001 M. F. Holick in P. U. Giacomoni Sun Protection in Man ii. 20 The exact biologic functions of lumisterol, tachysterol, suprasterols, and toxisterols is not well understood.
This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).
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n.1930
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