| 单词 | negative catalyst |
| 释义 | > as lemmasnegative catalyst negative catalyst n. Chemistry a substance that slows or inhibits a reaction while remaining chemically unchanged. ΘΚΠ the world > matter > chemistry > chemical reactions or processes > [noun] > processes or substances affecting reactions > catalysis > negative catalysis > negative catalyst negative catalyst1904 1904 Jrnl. Chem. Soc. 86 ii. 113 The simultaneous effect of a positive catalyst (copper sulphate) and a negative catalyst (mannitol or stannic chloride) has been studied. 1948 S. Glasstone Textbk. Physical Chem. (ed. 2) xiii. 1126 If the reaction is hindered by the added substance it is said to be a negative catalyst, and the word catalyst, when used alone, is almost invariably taken to imply acceleration of the chemical process. 1995 Biochemistry 34 7548 In the oxidation of ACV, IPNS is a negative catalyst of cepham formation but a positive catalyst of penam formation. < as lemmas |
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