| 单词 | aldehyde resin |
| 释义 | > as lemmasaldehyde resin aldehyde resin n. [originally after German Aldehydharz (J. Liebig 1835, in Ann. der Chemie 14 158)] now rare a resinous substance obtained by heating acetaldehyde (ethanal) with potassium hydroxide. ΚΠ 1839 J. W. Webster Man. Chem. (ed. 3) 447 Aldehyde resin is produced when potassa is dissolved in alcohol, and most speedily when the access of air is permitted. 1883 P. T. Austen tr. A. Pinner Introd. Study Org. Chem. 86 Aldehyde when treated with potassium hydroxide solution is converted into a yellow resinous mass, aldehyde resin. 1915 A. G. Woodman Food Anal. v. 158 Ordinary alcohol contains an appreciable amount of aldehyde, which in the presence of the potash forms the yellow aldehyde resin and gradually darkens. < as lemmas |
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