Results 31 to 40 of about 19,455 (252)

Responses of Ammonia-Oxidizing Microorganisms to Intercropping Systems in Different Seasons

Agriculture, 2021
Intercropping plays an essential role in agricultural production, impacting the soil’s physical and chemical properties and microbial communities. However, the responses of ammonia-oxidizing microorganisms in the continuous-cropping soil to different ...
Xingjia He, Sen Li, Fengzhi Wu
doaj   +1 more source

Communities of ammonia-oxidizing bacteria, ammonia-oxidizing archaea and nitrite-oxidizing bacteria in shrimp ponds

Annals of Microbiology, 2014
The communities of nitrifying microorganisms were identified in samples taken from six shrimp ponds in Thailand (five outdoor-earthen ponds and one indoor pond). The sequences of ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA), and nitrite-oxidizing bacteria (NOB) were analyzed after specific PCR amplification of the 16S rRNA or amoA ...
Papitchaya Srithep, Bongkoch Khinthong, Thanasita Chodanon, Sorawit Powtongsook, Wiboonlak Pungrasmi, Tawan Limpiyakorn   +5 more
openaire   +1 more source

Changes in the Species and Functional Composition of Activated Sludge Communities Revealed Mechanisms of Partial Nitrification Established by Ultrasonication

Frontiers in Microbiology, 2022
To achieve energy-efficient shortcut nitrogen removal of wastewater in the future, selective elimination of nitrite-oxidizing bacteria (NOB) while enriching ammonia-oxidizing microorganisms is a crucial step. However, the underlying mechanisms of partial
Yu Xue, Min Zheng, Shuang Wu, Yanchen Liu, Xia Huang   +4 more
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Alcohols as inhibitors of ammonia oxidizing archaea and bacteria

FEMS Microbiology Letters, 2023
Abstract Ammonia oxidizers are key players in the global nitrogen cycle and are responsible for the oxidation of ammonia to nitrite, which is further oxidized to nitrate by other microorganisms. Their activity can lead to adverse effects on some human-impacted environments, including water pollution through leaching of nitrate and ...
Barbora Oudova-Rivera, Andrew T Crombie, J Colin Murrell, Laura E Lehtovirta-Morley   +3 more
openaire   +2 more sources

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
doaj   +1 more source

Comparison of the Total, Diazotrophic and Ammonia-Oxidizing Bacterial Communities Between Under Organic and Conventional Greenhouse Farming

Frontiers in Microbiology, 2020
Organic greenhouse farming is an innovative system that may maintain a high yield and healthy agroecosystem. There have been no rigorous studies on the comparison of total and nitrogen-cycling bacterial community in vegetable soils between organic and ...
Chen Chen, Hui Han, Ting Xu, Ting Xu, Yizhong Lv, Kelin Hu, Xue Xian Li, Yuhui Qiao, Guo-Chun Ding, Guo-Chun Ding, Ji Li, Ji Li   +11 more
doaj   +1 more source

Photoinhibition of comammox reaction in Nitrospira inopinata in a dose- and wavelength-dependent manner

Frontiers in Microbiology, 2022
Apparent contribution of complete ammonia-oxidizing organisms (comammox) to the global nitrogen cycle highlights the necessity for understanding niche differentiation of comammox bacteria among other ammonia oxidizers. While the high affinity for ammonia
Ekaterina Y. Gottshall, Bruce Godfrey, Bo Li, Britt Abrahamson, Wei Qin, Mari Winkler   +5 more
doaj   +1 more source

Methane-generating ammonia oxidizing nitrifiers within bio-filters in aquaculture tanks

AMB Express, 2018
The discovery of aerobic and anammox bacteria capable of generating methane in bio-filters in freshwater aquaculture systems is generating interest in studies to understand the activity, diversity, distribution and roles of these environmental bacteria ...
Barry Kamira, Lei Lei Shi, Li Min Fan, Cong Zhang, Yao Zheng, Chao Song, Shun Long Meng, Geng Dong Hu, Xu Wen Bing, Zhang Jia Chen, Pao Xu   +10 more
doaj   +1 more source

Urease-Encoding Genes in Ammonia-Oxidizing Bacteria [PDF]

Applied and Environmental Microbiology, 2004
ABSTRACT Many but not all ammonia-oxidizing bacteria (AOB) produce urease (urea amidohydrolase, EC 3.5.1.5) and are capable of using urea for chemolithotrophic growth. We sequenced the urease operons from two AOB, the β-proteobacterium Nitrosospira sp.
Koper, T. E., El-Sheikh, A. L., Norton, Jeanette M., Klotz, M. G.   +3 more
openaire   +3 more sources

Gene abundances of AOA, AOB, and anammox controlled by groundwater chemistry of the Pearl River Delta, China

China Geology, 2021
Ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB), and anaerobic ammoniaoxidation (anammox) bacteria are very important contributors to nitrogen cycling in natural environments.
Kun Liu, Xin Luo, Jiu Jimmy Jiao, Ji-dong Gu, Ramon Aravena   +4 more
doaj   +1 more source