| 单词 | tar base |
| 释义 | > as lemmastar base tar base n. any of numerous cyclic, nitrogen-containing bases present in coal-tar distillates. ΘΚΠ the world > matter > chemistry > organic chemistry > organic bases > [noun] creatine1835 cystine1843 ammeline1846 creatinine1847 thialdine1847 toluidine1850 pyrrole base1853 parapicoline1857 pinacoline1866 xanthinine1868 choline1869 xanthocreatinine1887 xanthocreatine1891 Schiff base1892 tar base1921 thiocholine1929 1921 Jrnl. Amer. Chem. Soc. 43 1936 Crude coal tar bases vary greatly..in the nature and in the proportion of the bases which they contain. 1946 [see tar acid n.]. 1974 Encycl. Brit. Micropædia II. 1017/2 Tar bases are the basic constituents of the distillate oils, present after tar acids have been removed. < as lemmas |
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