| 单词 | turmeric paper |
| 释义 | > as lemmasturmeric paper turmeric paper n. unsized paper tinged with a solution of turmeric, used as a test for alkalis. ΘΚΠ the world > matter > chemistry > chemical tests > indicators > [noun] > test papers litmus paper1803 turmeric paper1806 test-paper1827 georgina paper1843 ozone paper1861 ozone test paper1872 turmeric test-paper1880 lead-paper1890 tetra-paper1890 1806 W. Henry Epitome Chem. (ed. 4) ii. i. 311 Turmeric paper and tincture are changed to a reddish-brown by alkalies. 1809 G. Pearson in Philos. Trans. (Royal Soc.) 99 316 The presence of an alkali I could in no instance perceive, by means of the usual tests, namely, turmeric paper, litmus paper [etc.]. 1857 E. L. Birkett Bird's Urinary Deposits (ed. 5) 288 The urine was clear, alkaline, turning turmeric paper brown. < as lemmas |
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