| 单词 | ammonia substitution compound |
| 释义 | > as lemmasammonia substitution compound C1. Comb. in which ammonia stands chiefly in attrib. relation, as ammonia gas, ammonia compounds, ammonia process, ammonia solution, ammonia substitution compound, ammonia works, etc. Also ammonia alum, ammonia amalgam, ammonia carbonate, ammonia salts, etc., in which ammonium n. is now used in more systematic nomenclature. ΚΠ 1849 M. Somerville Connex. Physical Sci. xxiv. 227 Paper prepared with the ammonia-citrate of iron. 1864 Reader 9 Apr. 464 The pale reddish amethystine colour of ammonia-iron-alum. 1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 169 Ammonia gas..is colourless. 1879 Athenæum 30 Aug. 277/3 The ‘ammonia process’—which has been developed by M. Ernest Solvay, of Brussels. < as lemmas |
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