Results 51 to 60 of about 5,499 (152)
Influence of oxygen availability on the activities of ammonia‐oxidizing archaea
Environmental Microbiology Reports, 2017 Summary Recent studies point to the importance of oxygen (O 2 ) in controlling the distribution and activity of marine ammonia‐oxidizing archaea (AOA), one of the most abundant prokaryotes in the ocean. The AOA are associated with regions of low O 2
Wei, Qin +6 more
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Ammonia oxidizers offset acidification stress via adaptive substrate affinity in aquatic ecosystems
Nature CommunicationsAmmonia 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 +1 more source
Abundance and composition of ammonia‐oxidizing bacteria and ammonia‐oxidizing archaea communities of an alkaline sandy loam [PDF]
Environmental Microbiology, 2008 Summary The abundance and composition of soil ammonia‐oxidizing bacteria (AOB) and ammonia‐oxidizing archaea (AOA) communities under different long‐term (17 years) fertilization practices were investigated using real‐time polymerase chain reaction and denaturing gradient gel electrophoresis (DGGE).
Ju-pei, Shen +4 more
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Immobilization of active ammonia-oxidizing archaea in hydrogel beads
npj Clean Water, 2021 Ammonia-oxidizing archaea (AOA) are major players in the nitrogen cycle but their cultivation represents a major challenge due to their slow growth rate and limited tendency to form biofilms. In this study, AOA was embedded in small (~2.5 mm) and large (~
Matthieu Landreau +3 more
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Occurrence of Ammonia-Oxidizing Archaea in Wastewater Treatment Plant Bioreactors [PDF]
Applied and Environmental Microbiology, 2006 ABSTRACT We report molecular evidence that ammonia-oxidizing archaea (AOA) occur in activated sludge bioreactors used to remove ammonia from wastewater. Using PCR primers targeting archaeal ammonia monooxygenase subunit A ( amoA ) genes, we retrieved and compared 75 sequences from five wastewater treatment
Park, Hee-Deung +4 more
openaire +3 more sources
mBioAmmonia-oxidizing archaea of the phylum Nitrososphaerota, formerly known as Thaumarchaeota, are globally distributed and play critical roles in the nitrogen and carbon cycles, particularly in environments with low ammonia concentrations.
Satoshi Nakagawa +9 more
doaj +1 more source
Freshwater Ammonia-Oxidizing Archaea Retain amoA mRNA and 16S rRNA during Ammonia Starvation
Life, 2015 In their natural habitats, microorganisms are often exposed to periods of starvation if their substrates for energy generation or other nutrients are limiting.
Elizabeth French, Annette Bollmann
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An RNA-based study of the distribution of ammonia-oxidizing microorganisms in vertical sediment
Ecological Indicators, 2021 Ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) play crucial roles in ammonia nitrogen degradation in freshwater lake sediment.
Tong-tong Liu, Hong Yang
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Gongye shui chuliNitrification and denitrification processes play crucial roles in biological nitrogen removal in water treatment systems. The ammonia oxidation in nitrification is the rate-limiting process, which converts low-valent ammonia-nitrogen into high-valent ...
GENG Hong +3 more
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Ammonia‐oxidizing archaea: important players in paddy rhizosphere soil? [PDF]
Environmental Microbiology, 2008 Summary The diversity (richness and community composition) of ammonia‐oxidizing archaea (AOA) and bacteria (AOB) in paddy soil with different nitrogen (N) fertilizer amendments for 5 weeks were investigated using quantitative real‐time polymerase chain reaction, denaturing gradient gel electrophoresis (DGGE) jand ...
Xue-Ping, Chen +4 more
openaire +2 more sources