| 释义 |
ergosterol Biochem.|ɜːˈgɒstərɒl|
[f. ergot + -sterol.]
A steroid alcohol, C28H44O, present esp. in ergot and in many yeasts and fungi, and productive of vitamin D2 under ultraviolet irradiation. Also earlier ergosterin [ad. F. ergostérine (C. Tanret 1889, in Compt. Rend. CVIII. 98); cf. cholesterin].
1889Jrnl. Chem. Soc. LVI. 408 Ergosterin..is completely dissolved by sulphuric acid without discoloration. 1906Ibid. XC. ii. 202 As obtained by Bömer's method..from the fat of rye, ergosterol contains a small amount of a product which forms small, white flocks melting at 60–61° and is non-saponifiable, but the nature of which is unknown. 1927Nature 24 Sept. 440/2 Irradiated ergosterol possesses extraordinarily potent anti-rachitic activity. 1928A. B. Callow Food & Health 51 Ergosterol..was present in minute quantities in what was formerly thought to be pure cholesterol... When ergosterol is irradiated it acquires the property of preventing or curing rickets, that is to say, it becomes vitamin D. 1934Nature 2 June 838/1 Irradiated ergosterol determines the fixation of calcium in the animal organism, and hence induces good ossification... These ergosterol-containing oils readily become rancid. 1963D. Kritchevsky in Florkin & Stotz Comprehensive Biochem. X. i. 14 Ergosterol..was isolated initially from ergot but..also occurs in most fungi, including yeast, in lichens, algae and some vegetable oils. |