Results 101 to 110 of about 254,784 (203)

Ammonia oxidation coupled to CO2 fixation by Archaea and Bacteria in an agricultural soil

open access: yes, 2011
Ammonia oxidation is an essential part of the global nitrogen cycling and was long thought to be driven only by bacteria. Recent findings expanded this pathway also to the archaea.
Dumont, Marc G.   +11 more
core   +1 more source

Enrichment and characteristics of ammonia-oxidizing archaea in wastewater treatment process

open access: yes, 2022
High purity ammonia-oxidizing archaea (AOA) culture containing a single AOA strain was enriched from the filtering materials of biological aerated filter. The concentration of AOA reached 3.27 × 107 copies/mL, while its proportion was 91.40%.
Yue, Y   +10 more
core   +1 more source

Ammonia‐oxidizing archaea and nitrite‐oxidizing nitrospiras in the biofilter of a shrimp recirculating aquaculture system [PDF]

open access: yes, 2013
This study analysed the nitrifier community in the biofilter of a zero discharge, recirculating aquaculture system ( RAS ) for the production of marine shrimp in a low density (low ammonium production) system.
Raskin, Lutgarde   +3 more
core   +1 more source

The Role of Iron‐Hyponitrite Intermediates in Biology and Insights From Synthetic Model Complexes

open access: yesChemistry – A European Journal, Volume 32, Issue 34, 11 September 2026.
Despite the difference in active site architecture, NO reduction by different NOR enzymes is expected to be linked by a common intermediate: hyponitrite (N2O22−). However, experimentally, very little is known about the coordination chemistry of iron with hyponitrite and the expected Fe‐hyponitrite intermediates.
Michael O. Lengel, Nicolai Lehnert
wiley   +1 more source

Predominance of ammonia-oxidizing archaea and nirK-gene-bearing denitrifiers among ammonia-oxidizing and denitrifying populations in sediments of a large urban eutrophic lake (Lake Donghu)

open access: yes, 2013
The coupled nitrification-denitrification process plays a pivotal role in cycling and removal of nitrogen in aquatic ecosystems. In the present study, the communities of ammonia oxidizers and denitrifiers in the sediments of 2 basins (Guozhenghu Basin ...
Song, Chunlei   +4 more
core   +1 more source

Hydroxylamine released by nitrifying microorganisms is a precursor for HONO emission from drying soils

open access: yesScientific Reports, 2018
Nitrous acid (HONO) is an important precursor of the hydroxyl radical (OH), the atmosphere´s primary oxidant. An unknown strong daytime source of HONO is required to explain measurements in ambient air.
M. Ermel   +13 more
doaj   +1 more source

Nitrogen removal and ammonia-oxidising bacteria in a vertical flow constructed wetland treating inorganic wastewater [PDF]

open access: yes, 2011
Nitrogen removal performance and the ammonia-oxidising bacterial (AOB) community were assessed in the batch loaded 1.3ha saturated surface vertical flow wetland at CSBP Ltd, a fertiliser and chemical manufacturer located in Kwinana, Western Australia ...
Domingos, S.S.   +4 more
core  

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

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   +1 more source

Ammonia-oxidizing archaea in engineered biofiltration systems [PDF]

open access: yes, 2016
Ammonia is a nitrogenous metabolic waste product that is produced by all animal life. High concentrations of ammonia are toxic to animals and may result in algal blooms and eutrophication in aquatic environments. To prevent negative impacts on animal and
Sauder, Laura
core  

Meta-analysis reveals ammonia-oxidizing bacteria respond more strongly to nitrogen addition than ammonia-oxidizing archaea [PDF]

open access: yes, 2016
Shifts in microbial communities driven by anthropogenic nitrogen (N) addition have broad-scale ecological consequences. However, responses of microbial groups to exogenous N supply vary considerably across studies, hindering efforts to predict community ...
Carey, Chelsea J   +9 more
core   +1 more source

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