| 单词 |
pyrene |
| 释义 |
▪ I. pyrene1 Bot.|ˈpaɪəriːn|
Also in L. form pyˈrena, pl. -æ.
[ad. mod.L. pȳrēna, f. Gr. πῡρήν fruit-stone.]
The stone of a fruit; esp. one of those in a drupaceous pome.
1837Keith Bot. Lex. s.v., If a putamen is composed of several cells, each cell takes the name of pyrena, as in Cornus. 1880Gray Struct. Bot. vii. §2. 296 The pyrenæ or stony inner portion of such carpels when drupaceous or composing a drupe of 2 or more stones. 1882Ogilvie, Pyrene.
▪ II. pyrene2 Chem.|ˈpaɪəriːn|
(Also 9 pyren.)
[f. Gr. πῦρ fire + -ene.]
A solid hydrocarbon (C16H10) obtained from the dry distillation of coal, crystallizing in microscopic laminæ.
1839R. D. Thomson in Brit. Ann. 356 Pyren, was prepared from the last process by taking the ether which was employed for the purification of the chrysen, mixing it [etc.]. Ibid., Nitrate of pyrenase; nitric acid forms with pyren a thick oily substance, which is purified by boiling with water and alcohol. 1857Miller Elem. Chem., Org. III. 552 Pyrene is soluble in hot ether, and may be separated from chrysene by means of this solvent, which at a low temperature deposits it in microscopic rhomboidal plates... This hydrocarbon appears to have been first observed by Laurent. 1877Watts Fownes' Chem. II. 592 Pyrene C16H10 and Chrysene are contained in the portion of coal-tar boiling above 360° (boiling point of anthracene).
b. Comb. as pyrene-ketone, pyrene-quinone, etc.
1895Muir & Morley Watts' Dict. Chem. III. 350.
Hence pyˈrenic a., of, belonging to, or derived from pyrene, as pyrenic acid, C16H8O5, forming pale yellow plates. |
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