Results 1 to 10 of about 122,200 (387)
Complete nitrification by Nitrospira bacteria [PDF]
Nature, 2015 Nitrification, the oxidation of ammonia via nitrite to nitrate, has always been considered to be a two-step process catalysed by chemolithoautotrophic microorganisms oxidizing either ammonia or nitrite. No known nitrifier carries out both steps, although complete nitrification should be energetically advantageous. This functional separation has puzzled
Holger Daims +15 more
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Nitrification of Amino-Acids [PDF]
Nature, 1950 IN the reported discussion of the “Nitrogen Cycle in Nature” at the Newcastle meeting of the British Association, reference was made to Prof. J. H. Quastel's observation that “all the amino-acids studied nitrify readily with the striking exception of methionine”. The report does not mention cystine in this connexion.
G. W. Winsor, O. Owen
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Frontiers in Microbiology, 2023 Biogenic nitrous oxide (N2O) from nitrification and denitrification in agricultural soils is a major source of N2O in the atmosphere, and its flux changes significantly with soil moisture condition.
Hui Wang +8 more
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Pilot-scale partial nitrification and anaerobic ammonium oxidation system for nitrogen removal from municipal wastewater [PDF]
Communications EngineeringPartial nitrification has the advantages of saving energy and reducing the need for carbon sources in municipal wastewater treatment. However, for municipal wastewater with low ammonia, start-up and maintenance of partial nitrification is a worldwide ...
Yunlong Su +5 more
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Complete nitrification by a single microorganism [PDF]
Nature, 2015 Nitrification is a two-step process where ammonia is first oxidized to nitrite by ammonia-oxidizing bacteria and/or archaea, and subsequently to nitrate by nitrite-oxidizing bacteria. Already described by Winogradsky in 1890, this division of labour between the two functional groups is a generally accepted characteristic of the biogeochemical nitrogen ...
Boran Kartal +9 more
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Urethanes and Soil Nitrification [PDF]
Applied Microbiology, 1953 Urethanes have marked physiological activity in plants and animals. Lefevre (1939) found that phenyl urethane affects wheat germination, and subsequently Templeman and Sexton (1946) showed that a variety of urethanes suppress the germination of wheat and oats without affecting charlock.
P. G. Scholefield, Juda Hirsch Quastel
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Contingent Effects of Liming on N2O-Emissions Driven by Autotrophic Nitrification
Frontiers in Environmental Science, 2020 Liming acidic soils is often found to reduce their N2O emission due to lowered N2O/(N2O + N2) product ratio of denitrification. Some field experiments have shown the opposite effect, however, and the reason for this could be that liming stimulates ...
Shahid Nadeem +4 more
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Winter nitrification in ice-covered lakes.
PLoS ONE, 2019 With changes in ice cover duration, nutrient loading, and anoxia risk, it is important to understand the mechanisms that control nitrogen cycling and oxygen depletion in lakes through winter.
Emily Cavaliere, Helen M Baulch
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PLoS ONE, 2019 Nitrification in terrestrial soils is one of the major processes of emission of nitrous oxide (N2O), a potent greenhouse gas and stratospheric-ozone-depleting substance.
Motoko Inatomi +2 more
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Frontiers in Plant Science, 2022 Based on an analysis of the current situation of nitrogen fertiliser application, it is suggested that improving the nitrogen utilisation efficiency of crops is an important means of promoting the sustainable development of agriculture and realises the ...
Shah Saud, Depeng Wang, Shah Fahad
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