| 单词 |
disazo- |
| 释义 |
disazo- Chem.|dɪsˈæzəʊ|
[f. Gr. δίς twice + azo-.]
A combining form used in organic chemistry to denote the presence in the molecule of a compound of two azo groups. Also used attrib. as disazo.
1886E. F. Smith tr. von Richter's Chem. Carbon Compounds 465 Such compounds can also be obtained by a second introduction of two molecules of a diazo-compound into phenols.., and are called disazo-derivatives. 1891Roscoe & Schorlemmer Treat. Chem. (ed. 2) III. iii. 353 Disazobenzene..is obtained from the corresponding amidodisazobenzene..by diazotizing and boiling with alcohol. 1913Bloxam & Lewis Chem. (ed. 10) 719 Disazo-dyestuffs..contain the ·N:N· group twice, and are of three kinds. 1930E. Fyleman tr. Curtis's Artificial Org. Pigments i. 6 In the patent literature a number of disazo-dyestuffs are also mentioned, but none of these have attained any importance. 1966Millar & Springall Sidgwick's Org. Chem. Nitrogen (ed. 3) xvii. 588 The azo dyes form the largest class of organic dyes... Monoazo, disazo, trisazo, and polyazo dyes are distinguished. |
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单词 disavowal 释义 disavowal|dsval|[f. disavow v. after avowal.]The action of disavowing ......