| 释义 |
reductase Biochem.|rɪˈdʌkteɪz|
[ad. F. réductase (M.-E. Pozzi-Escot 1902, in Bull. de la Soc. Chim. de Paris XXVII. 559), f. réduct-ion reduction: see -ase.]
a. Any enzyme which promotes chemical reduction.
1902Jrnl. Chem. Soc. LXXXII. i. 655 The author [sc. Pozzi-Escot] has discovered a new class of diastases which he calls ‘reductases’. 1914[see dehydrase a]. 1938Ann. Rev. Biochem. VII. 112 The protein of acetaldehyde reductase has been obtained in a crystalline condition. 1974Nature 13 Dec. 579/1 The enzymes responsible for the first step in nitrate assimilation and for nitrate respiration are the nitrate reductases, both these processes involving the conversion of nitrate to nitrite. 1977Proc. R. Soc. Med. LXX. 617/1 Thurnham..measured the erythrocyte glutathione reductase activity.
b. reductase test, a method of estimating the bacterial content of a sample of fluid, usu. milk, by measuring its reducing power.
1910Analyst XXXV. 207 (heading) Reductase test for milk. 1932Discovery Feb. 59/2 In the north of Europe..general use is made of the ‘reductase’ test, which takes the time required to decolourize a definite solution of methylene blue as a measure of the purity of milk. 1964Biol. Abstr. XLV. 3876/1 Application of the reductase test to 261 randomly selected staphylococcus strains showing a positive plasma coagulase test yielded reductase times of 15 minutes or less in 96·6% of the cases. |