Results 71 to 80 of about 217,293 (183)

The response of nitrifier, N-fixer and denitrifier gene copy numbers to the nitrification inhibitor 3,4-dimethylpyrazole phosphate

Plant, Soil and Environment, 2013
A laboratory incubation experiment was conducted to examine the effects of 3,4-dimethylpyrazole phosphate (DMPP) on the transformation of urea-N and associated microbial communities in a low-fertility brown soil. The soil was supplied with urea at 180 kg
X.X. Dong, L.L. Zhang, Z.J. Wu, H.W. Zhang, P. Gong   +4 more
doaj   +1 more source

Emergent Macrophytes Act Selectively on Ammonia-Oxidizing Bacteria and Archaea [PDF]

Applied and Environmental Microbiology, 2012
ABSTRACT Ammonia-oxidizing bacteria (AOB) and archaea (AOA) were quantified in the sediments and roots of dominant macrophytes in eight neutral to alkaline coastal wetlands. The AOA dominated in most samples, but the bacterial-to-archaeal amoA gene ratios increased with increasing ammonium levels and pH in
Trias Mansilla, Rosalia, Ruiz Rueda, Olaya, García Lledó, Arantzazu, Vilar Sanz, Ariadna, López i Flores, Rocío, Quintana Pou, Xavier, Hallin, Sara, Bañeras Vives, Lluís   +7 more
openaire   +3 more sources

Abundance and diversity of nitrogen-removing microorganisms in the UASB-anammox reactor.

PLoS ONE, 2019
Anaerobic ammonium oxidation is considered to be the most economical and low-energy biological nitrogen removal process. So far, anammox bacteria have not yet been purified from cultures.
Rui Chen, Junqin Yao, Nuerla Ailijiang, Ruisang Liu, Lei Fang, Yinguang Chen   +5 more
doaj   +1 more source

Indigenous Ammonia-Oxidizing Archaea in Oxic Subseafloor Oceanic Crust

mSystems, 2020
Oceanic ridge flank systems represent one of the largest and least-explored microbial habitats on Earth. Fundamental ecological questions regarding community activity, recruitment, and succession in this environment remain unanswered.
Rui Zhao, Håkon Dahle, Gustavo A. Ramírez, Steffen L. Jørgensen   +3 more
doaj   +1 more source

Hydroxylamine as an intermediate in ammonia oxidation by globally abundant marine archaea [PDF]

Proceedings of the National Academy of Sciences, 2012
The ammonia-oxidizing archaea have recently been recognized as a significant component of many microbial communities in the biosphere. Although the overall stoichiometry of archaeal chemoautotrophic growth via ammonia (NH 3 ) oxidation to nitrite (NO 2 −
Neeraja, Vajrala, Willm, Martens-Habbena, Luis A, Sayavedra-Soto, Andrew, Schauer, Peter J, Bottomley, David A, Stahl, Daniel J, Arp   +6 more
openaire   +2 more sources

ADP-dependent Phosphofructokinases in Mesophilic and Thermophilic Methanogenic Archaea [PDF]

, 2001
Phosphofructokinase (PFK) is a key enzyme of the glycolytic pathway in all domains of life. Two related PFKs, ATP-dependent and PPi-dependent PFK, have been distinguished in bacteria and eucarya, as well as in some archaea.
Kengen, S.W.M., Vos, W.M., de, Verhees, C.H., Tuininga, J.E., van der Oost, J., Stams, A.J.M., Oost, J., van der, de Vos, W.M.   +7 more
core   +1 more source

Ammonia manipulates the ammonia-oxidizing archaea and bacteria in the coastal sediment-water microcosms

, 2015
Ammonia was observed as a potential significant factor to manipulate the abundance and activity of ammonia-oxidizing microorganisms (AOMs) in water environments. For the first time, this study confirmed this phenomenon by laboratory cultivation.
Dai, Tianjiao, Sun, Renhua, Wen, Donghui, Zhang, Yan, Chen, Lujun   +4 more
core   +1 more source

Cultivation of Autotrophic Ammonia-Oxidizing Archaea from Marine Sediments in Coculture with Sulfur-Oxidizing Bacteria

, 2010
The role of ammonia-oxidizing archaea (AOA) in nitrogen cycling in marine sediments remains poorly characterized. In this study, we enriched and characterized AOA from marine sediments. Group I.1a crenarchaea closely related to those identified in marine
Byoung-Joon Park, Stefan Schouten, Sung-Keun Rhee, Jaap S. Sinninghe Damsté, Dae-No Yoon, Soo-Je Park   +5 more
core   +1 more source

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

, 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, Jin, W, Tu, R, Zhou, X, Du, S, Wang, Q, Han, S, Chen, H, Guo, K, Gao, SH, Xie, GJ   +10 more
core   +1 more source

Relative contributions of archaea and bacteria to aerobic ammonia oxidation in the environment [PDF]

Environmental Microbiology, 2008
Summary Traditionally, organisms responsible for major biogeochemical cycling processes have been determined by physiological characterization of environmental isolates in laboratory culture. Molecular techniques have, however, confirmed the widespread occurrence of abundant bacterial and archaeal groups with no cultivated ...
James I, Prosser, Graeme W, Nicol
openaire   +2 more sources