| 释义 |
oleic, a. Chem.|əʊˈliːɪk, ˈəʊliːɪk|
[f. L. ole-um oil + -ic.]
lit. Pertaining to or derived from oil; spec. in oleic acid: one of the fatty acids (C18H34O2), occurring in most fats, and a constituent of most soaps; obtained as an oily liquid, colourless, tasteless, and inodorous (when pure); also called elaic acid; in pl. extended to the series of acids to which this belongs: see quot. 1899. oleic ether: a general name for the oleates of hydrocarbon radicals, esp. oleate of ethyl, C18H33(C2H5)O2.
1819J. G. Children Chem. Anal. 315 Oleic acid was obtained by Chevreul from the soluble portion of the soap formed with hog's lard and potassa. 1836Blackw. Mag. XXXIX. 309 One of three acids, either the oleïc, margaritic, or cetic. 1866–77Watts Dict. Chem. IV. 192 Oleic acid crystallises from alcoholic solution in dazzling white needles. Ibid. 195 Oleate of Ethyl or Oleic Ether..is a colourless liquid of specific gravity 0·87 at 18°. 1871Roscoe Elem. Chem. 387 The natural oils and fats are all compounds of glycerin, chiefly with palmitic, oleic, or stearic acids. 1894Daily Graphic 20 Apr. 13/2 The smoothing of troubled waters by means of oil has been recently scientifically investigated,..the quieting effect of all oils or soaps used is in direct proportion to the amount of free oleic acid they contain. 1899E. F. Smith Richter's Organ. Chem. 276 Oleic Acids, Olefine Monocarbonylic Acids, CnH2n-1CO2H. The acids of this series, bearing the name Oleic Acids, because oleic acid belongs to them, differ from the fatty acids by containing two atoms of hydrogen less than the latter. |