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...the [[troposphere]] is primarily produced through the [[photolysis]] of [[nitrogen dioxide]] by photons with [[wavelength]]s (λ) less than 420 [[Nanometr ...nd electronic state of atomic O. This series of reactions creates a [[null cycle]], in which there is no net production or loss of any species involved. Sin ...

...s applied to the soil surface, a meaningful fraction of applied fertilizer nitrogen may be lost to the atmosphere as ammonia gas; this only occurs under certai For plants to absorb nitrogen from urea it must first be broken down: ...

== Nitrogen cycle == ...mb|619x619px|This is a table that identifies the processes of the nitrogen cycle with their corresponding chemical reactions.<ref>{{Cite book|title=Environm ...

...ilman|first8=David|year=1997|title=Human Alteration of the Global Nitrogen Cycle: Source and Consequences|journal=Ecological Applications|publisher=Ecologic ...=Crutzen|first1=P. J.|last2=Ehhalt|first2=D. H.|year=1977|title=Effects of nitrogen fertilizers and combustion on the stratospheric ozone layer|journal=Ambio|v ...

...product is exposed to gases such as [[chlorine]], [[hydrogen sulfide]], [[nitrogen dioxide]], and [[sulfur dioxide]] at levels in the [[parts per billion]] ra ...e days at 40 ± 2 °C and 75 ± 2 % R.H and 30 ± 5 PPB Chlorine, 200 ± 25 PPB Nitrogen dioxide, 200 ± 20 PPB Hydrogen sulfide and 200 ± 50 PPB Sulfur dioxide]] ...

.../www.ccj-online.com/wp-content/uploads/2011/05/308_FOGGING.pdf%5D Combined Cycle Journal]</ref><ref>S. Savic, M. Stevens, 2014. "Gas Turbine Air Inlet Cooli Inlet fogging reduces emissions of [[Nitrogen oxide|Oxides of nitrogen]] (NOx) because the additional water vapor quenches hot spots in the combus ...

...mical cycle''' is a type of [[Thermochemical cycle|two-step thermochemical cycle]] that uses as oxygen carrier cerium oxides (<math>CeO_2</math>/<math>Ce_2O ...ichiometric ceria cycle.png|thumb|upright=2|Basic non-stoichiometric ceria cycle scheme. The sweep gas can be substituted by a vacuum pump.]] ...

...permafrost to better understand their role in the Earth's natural [[carbon cycle]],<ref>{{Cite web|url=https://newscenter.lbl.gov/2011/11/08/permafrost-2/|t ...sing-nitrogen-cycling-rhizosphere-soil/|title=Bacterial quorum sensing and nitrogen cycling in rhizosphere soil|journal=FEMS Microbiology Ecology|volume=66|iss ...

...Hare |first4=P. E. |date=1986-10-01 |title=Kinetic fractionation of stable nitrogen isotopes during amino acid transamination |url=https://dx.doi.org/10.1016/0 ...f> The isotope effect associated with transamination also makes amino acid nitrogen isotopes a useful tool to study the structure of food webs. Repeated transa ...

...r 2014" /> The disproportionation mechanism involves a reduction-oxidation cycle where a single electron transfer is catalyzed by the Ni²⁺/Ni<sup ...s between the Ni(II) and Ni(III) oxidation states throughout the catalytic cycle. The axial histidine ligand may or may not be present in the oxidized enzym ...

...cycle, to understand the role of [[biogenic silica]] within the global Si cycle, and to investigate the applications and limitations of the [[Sedimentary r == Si isotopes in the Si biogeochemical cycle == ...

...sion and ring contraction|ring expansion]] reaction takes place in which a nitrogen atom is inserted into a carbon-carbon bond α- to the bridge head:<ref>{{cit :[[File:Cativa-process-catalytic-cycle.png|center|400px|The catalytic cycle of the Cativa process]] ...

...eria are diazophilic, i.e. they can live in environments extremely poor in nitrogen compounds, which allows them to distribute themselves throughout the enviro ...nitrogen sources, a characteristic due to their ability to fix atmospheric nitrogen. In Lagos in a city in Nigeria, nine bacterial strains ''[[Pseudomonas fluo ...

...t]]s, which are found in trace amounts, such as [[iron]]. Their [[Nutrient cycle|cycling]] within a system is controlled by many biological, chemical, and p ...ps://web.archive.org/web/20171208003233/http://www.ecy.wa.gov/programs/eap/Nitrogen/NitrogenNaturalSources.html|archive-date=2017-12-08}}</ref><ref name=":1">{ ...

...pollution]] by the chemical [[ammonia]] (NH₃) – a compound of [[nitrogen]] and [[hydrogen]] which is a byproduct of agriculture and industry. Commo ...urces/Recreation-and-Leisure/Aquarium-Fish/Aquarium-Water-Quality-Nitrogen-Cycle |access-date=2024-04-15 |website=www.fdacs.gov |language=en}}</ref> Ammonia ...

...Thermochemical Cycles] - Idaho National Laboratory (INL)</ref> The term ''cycle'' is used because aside of water, hydrogen and oxygen, the chemical compoun ...ics)|work]] is partially used as an input, the resulting '''thermochemical cycle''' is defined as a hybrid one. ...

Oxoferryl species are commonly proposed as intermediates in [[catalytic cycle]]s, especially biological systems in which O₂ activation is requ ...species is the thermal or photochemical oxidative elimination of molecular nitrogen from an [[azide]] complex. ...

...may not correlate in the field due to processes such as photorespiration, nitrogen metabolism and the [[Mehler reaction]]. === Nitrogen Balance Index === ...

{{Short description|Biogeochemical cycle}} ...10.5194/bg-18-1269-2021|title = Reviews and syntheses: The biogeochemical cycle of silicon in the modern ocean|year = 2021|last1 = Tréguer|first1 = Paul J. ...

...proton and ''B'' an {{nuclide|nitrogen|14|link=yes}} nucleus for the [[CNO cycle]]). ...