| 单词 | β-sitosterol |
| 释义 | > as lemmasβ-sitosterol Any of several closely similar waxy sterols found widely in plant tissues and resembling cholesterol in structure, originally isolated from wheatgerm oil; spec. the most common such substance, β-sitosterol (also called cinchol).Mostly denoting isomers of chemical formula C29H50O. Before 1926 considered to be a single substance; the isomers are now often distinguished by a prefixed Greek letter. ΘΚΠ the world > matter > chemistry > organic chemistry > alcohols > [noun] > steroid alcohols > sterols > named cinchol1885 cholesterol1894 phytosterol1898 sitosterol1898 stigmasterol1907 lanosterol1929 suprasterol1930 lumisterol1932 tachysterol1933 1898 Jrnl. Chem. Soc. 74 i. 72 A substance..is obtained which resembles the cholesterol of bile in external appearance and in composition..; it is named sitosterol. 1926 Jrnl. Amer. Chem. Soc. 48 2986 The substance corresponding in composition to sitosterol..is not homogeneous. It is a mixture containing at least three isomeric sterols... It is proposed to name these isomers α-, β- and γ-sitosterol. 1943 Ann. Reg. 1942 358 Work on algal chemistry showed that sitosterol, the characteristic sterol of the phanerogams, is common to the green algæ. 1974 M. C. Gerald Pharmacol. xxii. 401 Sitosterols enhance the elimination of cholesterol in the feces. 1987 Plant Physiol. 83 763/1 Following cold acclimation, the proportion of β-sitosterol increased at the expense of other sterols. 2007 P. C. Dutta et al. in M. D. Erickson Deep Frying (ed. 2) vii. 136 In french fry samples, both cholesterol and sitosterol oxides were detected. < as lemmas |
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