BioScience Dictionary

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Found Nitrogen fixation 6 times.

Displaying results 1 to 10.

1. Acetyl reduction assay (acetylene reduction assay)
A technique for measuring the nitrogen fixation activity in photosynthetic organisms. It uses a flame ionization detector and a gas chromatography apparatus to determine the reduction of acetylene to ethylene by the enzyme nitrogenase .

2. Denitrification
* The removal of an oxygen atom from a nitrogen compound (like NO3 to NO2, NO2 to NO, or NO to N2). This is something soil bacteria do successively until they release nitrogen gas, and is the opposite of nitrogen fixation . * The removal of nitrogen or nitrogen compounds from a substance.

3. Heterocyst
A differentiated cyanobacterial cell which carries out nitrogen fixation .

4. Nitrogen cycle
The global cycle of moving various forms of nitrogen through the air, water, soil, plants, animals of the planet. See nitrogen fixation .

5. Nitrogen fixation
* The conversion of atmospheric nitrogen (N2) into an organic form usable by plants and other organisms; nitrogen is typically fixed by bacteria that live in nodules on the roots of legumes and similar plants. * An industrial version of this process which is carried out by chemical reactions or by bacterial cultures.

6. Rhizobia
Bacteria in a symbiotic relationship with leguminous plants that results in nitrogen fixation .