Lexic.us

Definition of Nitrogen fixation

1. Noun. The assimilation of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacteria.

Definition of Nitrogen fixation

1. Noun. (chemistry) ,(biochemistry) the conversion of atmospheric nitrogen into ammonia and organic derivatives, by natural means, especially such conversion, by microorganisms in the soil, into a form that can be assimilated by plants ¹

¹ Source: wiktionary.com

Medical Definition of Nitrogen fixation

1. The incorporation of atmospheric nitrogen into ammonia by various bacteria, catalysed by nitrogenase. This is an essential stage in the nitrogen cycle and is the ultimate source of all nitrogen in living organisms. In the sea, the main nitrogen fixers are Cyanobacteria. There are several free living bacteria in soil that fix nitrogen including species of Azotobacter, Clostridium and Klebsiella. Rhizobium only fixes nitrogen when in symbiotic association, in root nodules, with leguminous plants. The oxygen sensitive nitrogenase is protected by plant produced leghaemoglobin and the plant obtains fixed nitrogen from the bacteria. See: Frankia. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Nitrogen Fixation

Literary usage of Nitrogen fixation

Below you will find example usage of this term as found in modern and/or classical literature:

1. Science by American Association for the Advancement of Science (1883)
"The potential for significant biological nitrogen fixation exists in Lake Erie. ... Although nitrogen fixation by blue- green algae does not occur at a ..."

2. A Text-book of General Bacteriology by Edwin Oakes Jordan (1914)
"(a) Nitrogen-fixation.—It is a striking fact that the store of nitrogen in ordinary uncultivated soil rich in vegetable matter increases naturally without ..."

3. International Catalogue of Scientific Literature by Royal Society (Great Britain) (1902)
"Nitrification 2000 Nitrogen, Fixation of .. .. 2OOO Nitrogenous Substances, Action of Bacteria on 1900 Nomenclature 0070 Non-Nitrogenous Substances, ..."

4. The Plant World by Plant World Association, Wild Flower Preservation Society (U.S.) (1916)
"BOOKS AND CURRENT LITERATURE FACTORS INFLUENCING nitrogen fixation. ... Some Factors Influencing nitrogen fixation and Nitrification. Hot. Gaz. 62: 311-317. ..."

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