Results 61 to 70 of about 5,499 (152)
Ecophysiological Characterization of Ammonia-Oxidizing Archaea and Bacteria from Freshwater [PDF]
Applied and Environmental Microbiology, 2012 ABSTRACT Aerobic biological ammonia oxidation is carried out by two groups of microorganisms, ammonia-oxidizing bacteria (AOB) and the recently discovered ammonia-oxidizing archaea (AOA). Here we present a study using cultivation-based methods to investigate the differences in growth of three AOA cultures and one AOB culture ...
Elizabeth, French +4 more
openaire +2 more sources
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 +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 +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 +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 +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 +6 more
openaire +2 more sources
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
mSphere, 2016 We report metagenomic evidence for the presence of a Nitrospira-like organism with the metabolic potential to perform the complete oxidation of ammonia to nitrate (i.e., it is a complete ammonia oxidizer [comammox]) in a drinking water system.
Ameet J. Pinto +5 more
doaj +1 more source
MicroorganismsThe Parque Nacional La Campana (PNLC) was recently recognized for its high soil surface microbial richness. Here, we explored the microbial community structure in soil profiles from contrasting facing slopes where sclerophyllous forest (SF) and ...
Carolina Quinteros-Urquieta +3 more
doaj +1 more source
Scientific 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