Ammonia Oxidation
Ammonia Oxidation - Related Videos
08:14
Ammonia Synthesis at Low Pressure
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Cited by 17 •
2017
Ammonia can be synthesized at low pressure by using a conventional catalyst and an ammonia selective absorbent.
06:27
Fast and Accurate Exhaled Breath Ammonia Measurement
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Cited by 16 •
2014
Ammonia is an important physiologic metabolite relevant to various disease and wellness states. It is also a difficult molecule to measure in breath, which demands particular precautions be taken to obtain accurate results. Not all factors influencing ammonia are known, but progress can be difficult without accounting for these factors.
03:14
Oxidation Numbers
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2020
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules. Oxidation Number (Oxidation State) In the case of an ionic compound, oxidation numbers are assigned based on the number of electrons transferred between reacting species. For example, in the formation of calcium...
12:05
Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia
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Cited by 15 •
2013
Herein the procedures for plasma enhanced chemical vapor deposition of perfluoroalkanes on microporous materials such as metal-organic frameworks to enhance their stability and hydrophobicity are described. Furthermore, breakthrough testing of milligram quantities of samples is described in detail.
01:30
Preparation of Amines: Alkylation of Ammonia and Amines
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2025
Alkylation is one of the methods used to prepare amines. Direct alkylation of ammonia or a primary amine with an alkyl halide gives polyalkylated amines along with a quaternary ammonium salt through successive SN2 reactions. This process of making the quaternary salt through the direct alkylation method is called exhaustive alkylation. Each alkylation step makes the nitrogen center more nucleophilic, which triggers successive alkylations until a quaternary ammonium salt is formed. Considering...
FAQs
Ammonia monooxygenase (AMO) sets the pathway’s first biochemical checkpoint. In nitrifying microorganisms, it converts ammonia into hydroxylamine, creating the substrate for the next oxidation step rather than producing nitrite directly. This distinction matters when interpreting the biology of ammonia oxidation because the enzyme links the starting nitrogen compound to the intermediate that precedes nitrite formation.
Hydroxylamine separates the pathway into two linked reactions. After AMO has produced it, the compound is oxidized to nitrite, so the overall conversion depends on completion of both stages. This intermediate provides a useful mechanistic checkpoint: it shows that nitrite formation is not a single direct transformation of ammonia, but the outcome of sequential microbial chemistry.
Oxygen commonly serves as the electron acceptor in this process, connecting the microbial conversion of ammonia with the chemistry needed for oxidation. Its role helps explain why ammonia oxidation is associated with oxygen-related nitrifying activity. Considering oxygen alongside AMO and the hydroxylamine-to-nitrite step gives a more complete account of the pathway’s mechanism.
Both groups are identified as nitrifying microorganisms capable of carrying out the ammonia-oxidation pathway. Their presence places the reaction within a broader microbial community rather than tying it to a single type of organism. This biological breadth is relevant when considering nitrogen transformations across soils, aquatic systems, and engineered environments such as wastewater treatment.
Treatment systems can use control of nitrifying communities to remove excess nitrogen before water reaches receiving environments. The pathway is therefore relevant not only as a microbial reaction but also as a management target: understanding which communities carry out nitrification supports nitrogen removal and helps protect receiving waters from eutrophication. The key focus is biological community control.
It links microbial activity to several ecosystem outcomes. In soils, the process influences nitrogen availability and therefore relates to soil fertility. In aquatic environments, it contributes to nutrient balance, while across ecosystems it also connects nitrogen transformation with greenhouse-gas production. These different consequences explain why the same biological pathway is studied in environmental biology as well as engineered treatment.