Results 41 to 50 of about 1,496 (173)

Dramatic loss of comammox Nitrospira associated with long-term nitrite feeding [PDF]

, 2017
Until recently, nitrification was thought to be a strict two-step process where ammonia was first oxidized to nitrite by ammonia-oxidizing bacteria and/or archaea, and subsequently to nitrate by nitrite oxidizing bacteria (NOB). Recent studies in NOB metabolism, however, have revealed that certain Nitrospira are capable of performing both steps ...
Dechesne, Arnaud, Kinnunen, Marta, Palomo, Alejandro, Smets, Barth F.   +3 more
core   +2 more sources

Abundance and Niche Differentiation of Comammox in the Sludges of Wastewater Treatment Plants That Use the Anaerobic–Anoxic–Aerobic Process

Life, 2022
Complete ammonia oxidizers (comammox), which directly oxidize ammonia to nitrate, were recently identified and found to be ubiquitous in artificial systems.
Sheng-Nan Zhang, Jian-Gong Wang, Dan-Qi Wang, Qiu-Yue Jiang, Zhe-Xue Quan   +4 more
doaj   +1 more source

Genomic profiling ofNitrospiraspecies reveals ecological success of comammoxNitrospira [PDF]

, 2019
AbstractNitrification was long thought to consist in the stepwise oxidation of ammonia to nitrite and of nitrite to nitrate by ammonia oxidizing and nitrite oxidizing microorganisms, respectively. Recently, single microorganisms capable of complete ammonia to nitrate oxidation (comammox) were identified in theNitrospiragenus.
Palomo, Alejandro, Dechesne, Arnaud, Smets, Barth F.   +2 more
openaire   +1 more source

An investigation of Nitrospira bacteria in coastal wetlands of China: distribution pattern and related environmental driving factors

Frontiers in Marine Science, 2023
Nitrate is mainly converted via aerobic nitrite oxidation during the second step of nitrification, which is catalyzed by nitrite-oxidizing bacteria (NOB) and the recently discovery complete ammonia oxidizers (comammox).
Qiang Zhao, Dongyao Sun, Dongyao Sun, Xiufeng Tang, Lijun Hou, Min Liu, Ping Han, Ping Han, Ping Han   +8 more
doaj   +1 more source

Activity and Metabolic Versatility of Complete Ammonia Oxidizers in Full-Scale Wastewater Treatment Systems

mBio, 2020
The recent discovery of complete ammonia oxidizers (comammox) contradicts the paradigm that chemolithoautotrophic nitrification is always catalyzed by two different microorganisms.
Yuchun Yang, Holger Daims, Yang Liu, Craig W. Herbold, Petra Pjevac, Jih-Gaw Lin, Meng Li, Ji-Dong Gu   +7 more
doaj   +1 more source

Metagenomic analysis of rapid gravity sand filter microbial communities suggests novel physiology of Nitrospira spp [PDF]

, 2016
Rapid gravity sand filtration is a drinking water production technology widely used around the world. Microbially catalyzed processes dominate the oxidative transformation of ammonia, reduced manganese and iron, methane and hydrogen sulfide, which may ...
Fowler, Jane, Gülay, Arda, Palomo, Alejandro, Rasmussen, Simon, Sicheritz-Pontén, Thomas, Smets, Barth F.   +5 more
core   +1 more source

Differential contribution of nitrifying prokaryotes to groundwater nitrification [PDF]

, 2023
The ecophysiology of complete ammonia-oxidizing bacteria (CMX) of the genus Nitrospira and their widespread occurrence in groundwater suggests that CMX bacteria have a competitive advantage over ammonia-oxidizing bacteria (AOB) and archaea (AOA) in these
Bristow, Laura A., Chaudhari, Narendrakumar, Herrmann, Martina, Jehmlich, Nico, Krüger, Markus, Küsel, Kirsten, Overholt, Will A., Taubert, Martin, Thamdrup, Bo, von Bergen, Martin   +9 more
core   +2 more sources

Ammonia- and Nitrite-Oxidizing Bacteria are Dominant in Nitrification of Maize Rhizosphere Soil Following Combined Application of Biochar and Chemical Fertilizer

Frontiers in Microbiology, 2021
Autotrophic nitrification is regulated by canonical ammonia-oxidizing archaea (AOA) and bacteria (AOB) and nitrite-oxidizing bacteria (NOB). To date, most studies have focused on the role of canonical ammonia oxidizers in nitrification while neglecting ...
Ping Sun, Ziting Zhao, Pingshan Fan, Wei Chen, Yunze Ruan, Qing Wang   +5 more
doaj   +1 more source

Ammonia oxidation: Ecology, physiology, biochemistry and why they must all come together [PDF]

, 2018
Ammonia oxidation is a fundamental core process in the global biogeochemical nitrogen cycle. Oxidation of ammonia (NH3) to nitrite (NO2 −) is the first and rate-limiting step in nitrification and is carried out by distinct groups of microorganisms ...
Abby, Arp, Balasubramanian, Bates, Bayer, Berg, Blainey, Brochier-Armanet, Burton, Cantera, Caranto, Cho, Costa, Daebeler, Daims, Daims, De Boer, de la Torre, Ensign, Fiencke, Frankland, Fumasoli, Gubry-Rangin, Hatzenpichler, Hayatsu, Herbold, Hink, Hommes, Hu, Jung, Jung, Karner, Kerou, Kim, Kits, Koskinen, Kozlowski, Kozlowski, Kozlowski, Könneke, Könneke, Laura E Lehtovirta-Morley, Lawson, Lawton, Lebedeva, Lehtovirta-Morley, Lehtovirta-Morley, Lehtovirta-Morley, Lehtovirta-Morley, Leininger, Lieberman, Martens-Habbena, Martens-Habbena, Merbt, Mussmann, Palatinszky, Palomo, Pester, Pjevac, Placella, Prosser, Purkhold, Rotthauwe, Santoro, Sauder, Sauder, Schloesing, Shen, Shen, Spang, Spang, Stieglmeier, Stieglmeier, Suzuki, Taylor, Tourna, Tourna, Treusch, Vajrala, van Kessel, Verhamme, Walker, Wang, Weber, Wijma, Winogradsky, Wuchter, Zeng   +87 more
core   +1 more source

Ammonia-oxidizing archaea and complete ammonia-oxidizing Nitrospira in water treatment systems

Water Research X, 2022
Nitrification, the oxidation of ammonia to nitrate via nitrite, is important for many engineered water treatment systems. The sequential steps of this respiratory process are carried out by distinct microbial guilds, including ammonia-oxidizing bacteria (
Sarah Al-Ajeel, Emilie Spasov, Laura A. Sauder, Michelle M. McKnight, Josh D. Neufeld   +4 more
doaj   +1 more source