| 单词 | quaternary compound |
| 释义 | > as lemmasquaternary compound quaternary compound n. Chemistry †(a) a compound containing a combination of four chemical elements or radicals, esp. (in living systems) one containing carbon, hydrogen, oxygen, and nitrogen (obsolete); (b) a compound consisting of or containing a quaternary salt, esp. a quaternary ammonium compound (see sense B. 1b). ΚΠ 1790 R. Kerr tr. A. Lavoisier Elements Chem. ii. iv. 189 I give the name of binary to the combinations of oxygen with the simple substances, because in these only two elements are combined. When three substances are united in one combination I call it ternary, and quaternary [L. quaternaires] when the combination consists of four substances united.] 1804 W. Nicholson tr. A.-F. de Fourcroy Gen. Syst. Chem. Knowl. VII. 169 All these different materials are only progressive modifications of the same matter, of a single primitive, ternary or quaternary compound. 1825 T. Thomson Attempt to Establish First Princ. Chem. I. 37 Ammonia is a quaternary compound, consisting of 1 atom azote and 3 atoms hydrogen. 1860 R. Owen Palæontol. 4 When an organism..developes [sic] tissues, the proximate principles of which are quaternary compounds of carbon, hydrogen, oxygen, and nitrogen, it is called an ‘animal’. 1910 Jrnl. Amer. Chem. Soc. 32 762 Methyldiphenylamine reacted smoothly with dimethylsulphate..giving the quaternary compound (C6H5)2(CH3)2NSO4CH35. 1925 Amer. Mercury May 127/2 The first result was a long series of quaternary compounds, based upon the amino-acids. 1991 Jrnl. Chromatogr. Biomed. Applic. 572 181 (title) Determination of the quaternary compound cyclotropium in human biological material. < as lemmas |
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