请输入您要查询的英文单词:

 

单词 azulene
释义

azulenen.

/ˈazjʊliːn/
Etymology: < Spanish azul blue + -ene comb. form.
Chemistry.
A liquid hydrocarbon, blue in colour, found in some volatile oils; = cerulein n.The term is used to cover not only the parent hydrocarbon but the class of derivatives with the same basic structure, viz. a five-ring joined to a seven-ring, isomeric with naphthalene, which has two six-rings joined together.
ΘΚΠ
the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > polynuclear aromatic hydrocarbons
green oil1607
paranaphthalene1838
anthracene1840
oxanthracene1862
chrysene1864
cerulein1866
acenaphthene1868
naphthoquinone1870
anthracene oil1873
azulene1874
acenaphthylene1875
ionene1894
1874 Jrnl. Chem. Soc. 27 1 Pure oil of wormwood (obtained from Dr. Septimus Piesse) being submitted to distillation, the greater part passed over..close upon 200°, a portion of blue oily product being obtained at a higher temperature (the azulene of Piesse and cœruleïn of Gladstone).
1880 New Sydenham Soc. Lexicon Cærulein, same as Azulene.
1956 Nature 21 Jan. 145/2 In the fractionation of hydrocarbons found in Copaiba balsam, we have isolated..a compound with the typical reactions of azulenes, and which we propose to call ‘cario~azulene’.
This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018).
<
n.1874
随便看

 

英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2024/12/22 21:35:53