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Nitrite

About: Nitrite is a research topic. Over the lifetime, 15425 publications have been published within this topic receiving 484581 citations.


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Journal ArticleDOI
TL;DR: It is argued that oxygen limitation in the top sediments of the Dollard is responsible for development of a nitrite maximum in sediment pore water and for a relative high ratio of ammonia oxidizers to nitrite oxidizers.

153 citations

Journal ArticleDOI
TL;DR: A coculture with about equal amounts of n-damo and anammox bacteria was established that converted nitrite at a rate of 0.1 kg-N/m3/day (17.2 mmol day−1), indicating that the application of such a coculture for nitrogen removal may be feasible in the near future.
Abstract: itrite-dependent anaerobic oxidation of methane (n-damo) and ammonium (anammox) are two recently discovered processes in the nitrogen cycle that are catalyzed by n-damo bacteria, including "Candidatus Methylomirabilis oxyfera," and anammox bacteria, respectively. The feasibility of coculturing anammox and n-damo bacteria is important for implementation in wastewater treatment systems that contain substantial amounts of both methane and ammonium. Here we tested this possible coexistence experimentally. To obtain such a coculture, ammonium was fed to a stable enrichment culture of n-damo bacteria that still contained some residual anammox bacteria. The ammonium supplied to the reactor was consumed rapidly and could be gradually increased from 1 to 20 mM/day. The enriched coculture was monitored by fluorescence in situ hybridization and 16S rRNA and pmoA gene clone libraries and activity measurements. After 161 days, a coculture with about equal amounts of n-damo and anammox bacteria was established that converted nitrite at a rate of 0.1 kg-N/m(3)/day (17.2 mmol day(-1)). This indicated that the application of such a coculture for nitrogen removal may be feasible in the near future.

152 citations

Journal ArticleDOI
Qian Chen1, Jinren Ni1
TL;DR: The nitrogen removal in strain LAD9 was speculated to comply with the mechanism of heterotrophic nitrification coupled with aerobic denitrification (NH(4)(+)-NH(2)OH-NO(2)(-)-N( 2)O-N(2)), in which also accompanied with the mutual transformation of nitrite and nitrate.

152 citations

Journal ArticleDOI
TL;DR: The anoxic release of NO is mediated by endothelial nitric oxide synthase (eNOS), can be abolished by inhibitors of NOS and is accompanied by consumption of intracellular nitrite, and its magnitude and duration suggests that the nitrite reductase activity of eNOS is relevant for fast NO delivery in hypoxic vascular tissues.
Abstract: Cultured bEND.3 endothelial cells show a marked increase in NO production when subjected to anoxia, even though the normal arginine pathway of NO formation is blocked due to absence of oxygen. The rate of anoxic NO production exceeds basal unstimulated NO synthesis in normoxic cells. The anoxic release of NO is mediated by endothelial nitric oxide synthase (eNOS), can be abolished by inhibitors of NOS and is accompanied by consumption of intracellular nitrite. The anoxic NO release is unaffected by the xanthine oxidase inhibitor oxypurinol. The phenomenon is attributed to anoxic reduction of intracellular nitrite by eNOS, and its magnitude and duration suggests that the nitrite reductase activity of eNOS is relevant for fast NO delivery in hypoxic vascular tissues.

152 citations

Journal ArticleDOI
01 Sep 1974-Planta
TL;DR: The assimilation of nitrate, nitrite and ammonia in barley, wheat, corn and bean leaves was studied using 15N-labelled molecules and either leaf chamber experiments with the uptake of the nitrogen species in the transpiration stream, or vacuum-infiltration experiments.
Abstract: The assimilation of nitrate, nitrite and ammonia in barley, wheat, corn and bean leaves was studied using 15N-labelled molecules and either leaf chamber experiments with the uptake of the nitrogen species in the transpiration stream, or vacuum-infiltration experiments. The assimilation of 15NO3− into amino nitrogen was strictly dependent on light and ceased abruptly when the light was extinguished. If the leaves were exposed to air, CO2-free air or N2 there was no effect on the rate of NO3− assimilation over 0.5 h. After 1.25 h of CO2-free air, NO3− assimilation into amino acids was sharply reduced. Resupply of air at this time stimulated NO3− assimilation and restored it to the rate observed in leaves exposed to air only. There was no recovery by tissue pretreated for 1.25 h in N2 and subsequently resupplied with air. Incorporation of 15NO2− was also markedly dependent on light with little reduction occurring in the dark. Incorporation of 15NH4+ into amino acids was stimulated 5 fold by light but considerable incorporation occurred in the dark. The presence of 100 mM NO3− had no effect on the rate of incorporation of 15NO2− or 15NH4+. Nitrite at 1 mM had no effect on 15NO3− incorporation but at 10 mM inhibited it completely after 0.5 h. Ammonia at 1 mM had no effect on 15NO3− or 15NO2− incorporation and while 10 mM inhibited incorporation for 0.5 h this inhibition did not persist.

152 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023606
20221,333
2021475
2020459
2019467
2018509