عنوان فارسی مقاله: تثبیت نیتروژن
عنوان انگلیسی مقاله:
فهرست مطالب
Nitrogen Fixation
Introduction
Nitrogen Fixation
Nitrification
Denitrification
Nitrogen fixation by cyanobacteria
Case Study
بخشی از مقاله
Nitrification
Nitrification is the biological conversion of ammonium to nitrate
Nitrification is a two-step process.
In the first step of nitrification, ammonia-oxidizing bacteria oxidize ammonia to nitrite
NH3 + O2 → NO2-+ 3H+ + 2e- (1)
Bacteria known as Nitrosomonas convert ammonia and ammonium to nitrite
کلمات کلیدی:
Nitrogen fixation - Wikipedia https://en.wikipedia.org/wiki/Nitrogen_fixation Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia (NH3) or other molecules available to living organisms. Atmospheric nitrogen or molecular dinitrogen (N2) is relatively inert: it does not easily react with other chemicals to form new compounds. Non-biological natural ... · Biological nitrogen fixation · Industrial nitrogen fixation Biological Nitrogen Fixation | Learn Science at Scitable - Nature www.nature.com/scitable/knowledge/library/biological-nitrogen-fixation-23570419 by SC Wagner - 2011 - Cited by 45 - Related articles Nitrogen is the most important, limiting element for plant production. Biological nitrogen fixation is the only natural means to convert this essential element to a ... nitrogen fixation | chemical reaction | Britannica.com https://www.britannica.com/science/nitrogen-fixation Nitrogen fixation, any natural or industrial process that causes free nitrogen (N 2), which is a relatively inert gas plentiful in air, to combine chemically with other ... nitrogen-fixing bacteria | biology | Britannica.com https://www.britannica.com/science/nitrogen-fixing-bacteria Nitrogen-fixing bacteria, microorganisms capable of transforming atmospheric nitrogen into fixed nitrogen (inorganic compounds usable by plants). More than 90 percent of all nitrogen fixation is effected by these organisms, which thus play an important role in the nitrogen cycle. Nitrogen fixation archive.bio.ed.ac.uk/jdeacon/microbes/nitrogen.htm some bacteria can convert N2 into ammonia by the process termed nitrogen fixation; these bacteria are either free-living or form symbiotic associations with ... Type of fixation: N2 fixed (1012 g per year, or 1... Lightning: about 10 Forest and non-agricultural land: about 50 Agricultural land: about 90 Nitrogen Fixation - Tree of Life Web Project tolweb.org/notes/?note_id=3920 In a symbiotic relationship with the soil bacteria known as 'rhizobia', legumes form nodules on their roots (or stems, see figure below) to 'fix' nitrogen into a form ... The Nitrogen Cycle - Kimball's Biology Pages www.biology-pages.info/N/NitrogenCycle.html Jump to Nitrogen Fixation - The nitrogen molecule (N2) is quite inert. ... Three processes are responsible for most of the nitrogen fixation in the biosphere:. What Is Fixed Nitrogen or Nitrogen Fixation? - ThoughtCo https://www.thoughtco.com › ... › Science › Chemistry › Biochemistry Jul 6, 2016 - Nitrogen fixation is a key part of the nitrogen cycle. Here is a look at what fixed nitrogen is and an explanation of different fixation processes. NMSU: Nitrogen Fixation By Legumes aces.nmsu.edu › ... › How-To Publications › Agronomy Publications Biological nitrogen fixation is the process that changes inert N2 into biologically useful NH3. This process is mediated in nature only by N-fixing rhizobia bacteria ... Images for Nitrogen Fixation
