Results 1 to 10 of about 19,455 (252)

Phanerozoic radiation of ammonia oxidizing bacteria [PDF]

open access: yesScientific Reports, 2021
The modern nitrogen cycle consists of a web of microbially mediated redox transformations. Among the most crucial reactions in this cycle is the oxidation of ammonia to nitrite, an obligately aerobic process performed by a limited number of lineages of ...
L. M. Ward, D. T. Johnston, P. M. Shih
doaj   +6 more sources

Role of Nitric Oxide in Hydroxylamine Oxidation by Ammonia-Oxidizing Bacteria. [PDF]

open access: yesAppl Environ Microbiol, 2023
Ammonia oxidation by chemolithoautotrophic ammonia-oxidizing bacteria (AOB) is thought to contribute significantly to global nitrous oxide (N 2 O) emissions and leaching of oxidized nitrogen, particularly through their activity in nitrogen (N)-fertilized agricultural production systems.
Choi E, Chaudhry SI, Martens-Habbena W.
europepmc   +3 more sources

Biogeography of anaerobic ammonia-oxidizing (anammox) bacteria [PDF]

open access: yesFrontiers in Microbiology, 2014
Anaerobic ammonia-oxidizing (anammox) bacteria are able to oxidize ammonia and reduce nitrite to produce N2 gas. After being discovered in a wastewater treatment plant (WWTP), anammox bacteria were subsequently characterized in natural environments ...
Puntipar eSonthiphand   +2 more
doaj   +3 more sources

Selective Enrichment of Nitrososphaera viennensis-Like Ammonia-Oxidizing Archaea over Ammonia-Oxidizing Bacteria from Drinking Water Biofilms [PDF]

open access: yesMicrobiology Spectrum, 2022
Ammonia-oxidizing archaea (AOA) can oxidize ammonia to nitrite for energy gain. They have been detected in chloraminated drinking water distribution systems (DWDS) along with the more common ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria
Yissue Woo   +2 more
doaj   +2 more sources

Dating Ammonia-Oxidizing Bacteria with Abundant Eukaryotic Fossils. [PDF]

open access: yesMol Biol Evol
Abstract Evolution of a complete nitrogen cycle relies on the onset of ammonia oxidation, which aerobically converts ammonia to nitrogen oxides. However, accurate estimation of the antiquity of ammonia-oxidizing bacteria (AOB) remains challenging because AOB-specific fossils are absent and bacterial fossils amenable to calibrate ...
Liao T   +4 more
europepmc   +5 more sources

Ammonia oxidizers offset acidification stress via adaptive substrate affinity in aquatic ecosystems [PDF]

open access: yesNature Communications
Ammonia oxidation, a critical nitrogen cycle process, exhibits contradictory responses to aquatic acidification, and the underlying mechanism remains unresolved. Here, through pH manipulation experiments across diverse ecosystems and with a model ammonia-
Senwei Tong   +6 more
doaj   +2 more sources

A review of ammonia-oxidizing bacteria and archaea in Chinese soils

open access: yesFrontiers in Microbiology, 2012
Ammonia (NH3) oxidation, the first and rate-limiting step of nitrification, is a key step in the global Nitrogen (N) cycle. Major advances have been made in recent years in our knowledge and understanding of the microbial communities involved ammonia ...
Ji-Zheng eHe   +3 more
doaj   +3 more sources

Characterization of a long overlooked copper protein from methane- and ammonia-oxidizing bacteria [PDF]

open access: yesNature Communications, 2018
Methane- and ammonia-oxidizing bacteria use the integral membrane, copper-dependent enzymes particulate methane monooxygenase (pMMO) and ammonia monooxygenase (AMO) to oxidize methane and ammonia.
Oriana S. Fisher   +12 more
doaj   +2 more sources

Comparison of enumeration methods for ammonia-oxidizing bacteria

open access: yesWater Science and Technology, 2001
MPN, antibody, fluorescent in situ hybridization (FISH) and dot blot hybridization methods for enumeration of ammonia-oxidizing bacteria were applied to various samples from suspended systems. As for FISH, reoptimization of an oligonucleotide probe Nso190 was attempted. The advantages and disadvantages of these methods were discussed.
Matsuo T, Mino T, Satoh H
exaly   +3 more sources

Vertical segregation and phylogenetic characterization of ammonia-oxidizing bacteria and archaea in the sediment of a freshwater aquaculture pond [PDF]

open access: yesFrontiers in Microbiology, 2016
Pond aquaculture is the major freshwater aquaculture method in China. Ammonia-oxidizing communities inhabiting pond sediments play an important role in controlling culture water quality.
Shimin eLu   +10 more
doaj   +2 more sources

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