| 释义 |
▪ I. protogenic, a.1|prəʊtəʊˈdʒɛnɪk|
[irreg. f. Gr. πρωτογεν-ής first-born, primeval (see protogenes) + -ic.]
Primitive, or primitively formed. a. Of or belonging to an original race or lineage.
1851D. Wilson Preh. Ann. (1863) I. ix. 254 The former adheres to the protogenic character of the Celtae.
b. Geol. Applied to the primary or originally-formed igneous rocks: opposed to deuterogenic.
fig.c1850H. Reeve in Academy 8 Oct. (1898) 22/1 [Weighing Macaulay against Newton and Bacon, as a mind] essentially of the tertiary formation; [theirs] protogenic.
c. Bot. Applied to intercellular spaces, etc. formed in early stages of growth: opp. to hysterogenic.
1885G. L. Goodale Physiol. Bot. (1892) 99 note, A distinction..between those intercellular spaces which are formed when the tissues begin to differentiate,—protogenic,—and those formed in older tissues,—hysterogenic.
▪ II. protogenic, a.2 Chem.|-ˈdʒɛnɪk|
[f. proton + -genic.]
Of a solvent (or solute): having a tendency to protonate most solutes (or solvents). Opp. protophilic a.
1931N. F. Hall in Chem. Rev. VIII. 194 The protogenic and protophilic character of very weak acids and bases is largely masked by the overwhelming prominence of the similar properties of water. 1940Glasstone Textbk. Physical Chem. xii. 958 For convenience solvents are divided roughly into three categories according as the molecules are (a) proton acceptors, i.e., basic, or protophilic, (b) proton donors, i.e., acidic, or protogenic, or (c) neither donors nor acceptors, i.e., aprotic. 1969R. G. Bates in Coetzee & Ritchie Solute-Solvent Interactions ii. 51 The four classes of solvents, ‘amphiprotic’, ‘protogenic’, ‘protophilic’, and ‘aprotic’, are not clearly restrictive and the proper classification of many solvents is in doubt. 1973E. J. King in Covington & Dickinson Physical Chem. Org. Solvent Syst. iii. 333 Formic acid is an obvious example of an acidic or protogenic solvent, but it has weak basic properties too. |