| 单词 | pyrrole-red |
| 释义 | > as lemmaspyrrole-red pyrrole-red n. a red, amorphous, polymeric substance obtained by heating an acidic solution of pyrrole. ΚΠ 1857 T. Anderson in Trans. Royal Soc. Edinb. 21 593 Pyrrol Red..is produced whenever pyrrol is boiled with an excess of acid. 1950 Thorpe's Dict. Appl. Chem. (ed. 4) X. 337/2 Pyrrole..is only slowly dissolved by dilute acids in the cold; on warming, it polymerises to pyrrole-red. 1994 Jrnl. Org. Chem. 59 585/1 ‘Pyrrole-red’ species are known to form in the presence of strong acids, though their structures have not been determined. < as lemmas |
| 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。