Results 141 to 150 of about 4,455 (169)

Competitive enrichment of comammox Nitrospira in floccular sludge

Water Research
The discovery of complete ammonium oxidation (comammox) has subverted the traditional perception of two-step nitrification, which plays a key role in achieving biological nitrogen removal from wastewater. Floccular sludge-based treatment technologies are being applied at the majority of wastewater treatment plants in service where detection of various ...
Hou, Jiaying, Zhu, Ying, Liu, Jinzhong, Lin, Limin, Zheng, Min, Yang, Linyan, Wei, Wei, Ni, Bing-Jie, Chen, Xueming   +8 more
openaire   +4 more sources

Relevance of Nitrospira for nitrite oxidation in a marine recirculation aquaculture system and physiological features of a Nitrospira marina ‐like isolate

Environmental Microbiology, 2011
Summary In biofilters of recirculation aquaculture systems (RAS), nitrification by lithoautotrophic microorganisms is essential to prevent the cultivated organisms from intoxication with ammonium and nitrite. In moving‐bed biofilters nitrifying microorganisms are immobilized together with heterotrophic bacteria in
Sabine, Keuter, Myriam, Kruse, André, Lipski, Eva, Spieck   +3 more
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Phylum BVIII. Nitrospirae phy. nov.

2001
The phylum Nitrospirae is based mainly on phylogenetic grounds. At present, it consists of a single class, order, and family of Bacteria and environtaxa that branch deeply in the major reference trees; member taxa consistently group together. Gram-negative, curved, vibrioid or spiral-shaped cells.
George M. Garrity, John G. Holt, Eva Spieck, Eberhard Bock, D. Barrie Johnson, Stefan Spring, Karl-Heinz Schleifer, James S. Maki   +7 more
openaire   +1 more source

Specific Micropollutant Biotransformation Pattern by the Comammox Bacterium Nitrospira inopinata

Environmental Science & Technology, 2019
The recently discovered complete ammonia-oxidizing (comammox) bacteria occur in various environments, including wastewater treatment plants. To better understand their role in micropollutant biotransformation in comparison with ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA), we investigated the biotransformation capability of ...
Ping Han, Yaochun Yu, Lijun Zhou, Zhenyu Tian, Zhong Li, Lijun Hou, Min Liu, Qinglong Wu, Michael Wagner, Yujie Men   +9 more
openaire   +4 more sources

The environmental detection of comammox Nitrospira

2017
Vor kurzem wurden die ersten Mikroorganismen entdeckt, die in der Lage sind Ammonium komplett zu Nitrat zu oxidieren (‘comammox’), und dadurch das Dogma, über die Arbeitsteilung in der Nitrifikation in zwei aufeinanderfolgenden Schritten, für ungültig erklärt.
openaire   +1 more source

Isolation and immunocytochemical location of the nitrite-oxidizing system in Nitrospira moscoviensis

Archives of Microbiology, 1998
A membrane-associated nitrite-oxidizing system of Nitrospira moscoviensis was isolated from heat-treated membranes. The four major proteins of the enzyme fraction had apparent molecular masses of 130, 62, 46, and 29 kDa, respectively. The nitrite-oxidizing activity was dependent on the presence of molybdenum.
, Spieck, , Ehrich, , Aamand, , Bock
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Nitrite concentration influences the population structure of Nitrospira ‐like bacteria

Environmental Microbiology, 2006
Summary Chemolithoautotrophic nitrite oxidizers of the genus Nitrospira are a monophyletic but diverse group of organisms, are widely distributed in many natural habitats, and play a key role in nitrogen elimination during biological wastewater treatment.
Maixner, Frank, Noguera, Daniel R., Anneser, Bettina, Stöcker, Kilian, Wegl, Gertrude, Wagner, Michael, Daims, Holger   +6 more
openaire   +3 more sources

Cyanate utilization by and cryopreservation of Nitrospira moscoviensis

2015
Nitrogen is a common element in the universe and necessary for all known forms of life on Earth. The nitrogen cycle is a key process, by which nitrogen is converted in various chemical forms by biological processes. One of the key processes in the nitrogen cycle is nitrification, describing the sequential oxidation of ammonia via nitrite to nitrate ...
openaire   +1 more source

Comammox Nitrospira clade B contributes to nitrification in soil

Soil Biology and Biochemistry, 2019
Abstract Comammox, one nitrifying microorganism carries out the complete oxidation of ammonia to nitrate, have been recently discovered, and are found in a wide range of environments, including soil. However, conditions under which they actually contribute to nitrification in soil have not yet been demonstrated.
Wang, Zhihui, Cao, Yanqiang, Zhu-Barker, Xia, Nicol, Graeme W., Wright, Alan, Jia, Zhongjun, Jiang, Xianjun   +6 more
openaire   +3 more sources

Comammox Nitrospira are the dominant ammonia oxidizers in the Yangtze estuarine biofilms

Water Research
Biofilms are indispensable ecological habitats for microbes that have garnered global attention and play a potential role in influencing the biogeochemical cycling of nitrogen. However, the biogeochemical significance of biofilms and the mechanisms by which they regulate nitrogen cycling remain elusive.
Xiu-feng Tang, Xing-pan Guo, Lu Kuang, Xin-jie Chen, Nazupar Sidikjan, Ting-ting Xu, Shan Jiang, Min Liu, Li-jun Hou, Yi Yang   +9 more
openaire   +2 more sources