| 释义 |
deactivate, v.|diːˈæktɪveɪt|
[f. de- + activate v.]
trans. To render inactive or less reactive; spec. to deprive of chemical action, to render less chemically reactive. So deactiˈvation, the process or result of deactivating; deˈactivator, a substance which deactivates.
1904Sci. Amer. Suppl. 20 Feb. 23523/1 He finds that the law of de-activation is still the same throughout this range of temperature. 1938Jrnl. Chem. Soc. June 905 Just as the methyl substituent activates all positions,..so the carbethoxyl group deactivates all positions. 1939Nature 29 Apr. 734/1 The stabilization of petrols by small quantities of organic compounds known as deactivators, which prevent oxidation, is an important advance. 1947Science News V. 160 This drift activates or deactivates the aromatic nucleus. 1956A. K. Osborne Encycl. Iron & Steel Industry 105/2 Deactivation, the process of prior removal of the active constituents, usually oxygen, from a corrosive liquid. 1958Economist 20 Dec. 1051/1 (Advt.), Gum inhibitors and metal deactivators used in motor and aviation fuels to maintain quality during storage and use. 1970J. Earl Tuners & Amplifiers i. 24 A switch for deactivating the stereo decoder on a weak stereo signal. |