| 单词 |
nitrification |
| 释义 |
nitrification|ˌnaɪtrɪfɪˈkeɪʃən|
[a. F. nitrification (1797): see nitrify v. and -fication.]
1. a. The process of nitrifying; the production of nitre or nitrates.
1827[see nitrifiable a.]. 1828–32in Webster. 1842T. Graham Chem. 456 The latest writer upon nitrification is Professor Kuhlmann. 1869Roscoe Elem. Chem. 201 The process of nitrification, in which animal matter..is exposed in heaps, mixed together with wood-ashes and lime, to the action of the air. 1884F. J. Lloyd Sci. Agric. 72 Nitrification causes the hydrogen to be taken away and its place supplied by oxygen. 1897Bull. Minnesota Agric. Exper. Station No. 53. 7 Although a corn crop takes more nitrogen from the soil than a wheat crop, the cultivation of the corn crop favors nitrification (production of nitrates from humus) and results in leaving more available nitrogen in the soil. 1926Tansley & Chipp Study of Vegetation vii. 122 This process of nitrification..carried out by special bacteria, is of the first importance in humous soils. 1966McGraw-Hill Encycl. Sci. & Technol. IX. 111/1 A well-aerated, fertile, neutral to slightly alkaline soil will provide optimum conditions for nitrification.
b. fig. with reference to the use of nitre as an ingredient of gunpowder.
1832Blackw. Mag. XXXI. 92 In this blaze of cordons, and perpetual glow of homage, what female heart, not absolutely stone, could resist a little nitrification?
2. The process of impregnating with nitric acid.
1880Daily News 27 Mar. 5/4 Practically gun-cotton and nitro-glycerine are the same thing, except that in the one case it is a liquid and in the other a solid that has been subjected to the so-called process of nitrification. 1892Greener Breech Loader 162 Nitro-explosives are..made from pulped wood which after nitrification [etc.]. |
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