Results 261 to 270 of about 48,601 (301)

Ecological characteristics of anaerobic ammonia oxidizing bacteria

Applied Microbiology and Biotechnology, 2013
Anaerobic ammonium oxidation (anammox) is the microbial conversion of ammonium and nitrite to dinitrogen gas. The functional microbes of anammox reaction are anammox bacteria, which were discovered in a wastewater treatment system for nitrogen removal.
Shuang, Ding, Ping, Zheng, Huifeng, Lu, Jianwei, Chen, Qaisar, Mahmood, Ghulam, Abbas   +5 more
openaire   +2 more sources

Contribution of ammonia-oxidizing archaea and ammonia-oxidizing bacteria to ammonia oxidation in two nitrifying reactors

Environmental Science and Pollution Research, 2018
In this study, two laboratory nitrifying reactors (NRI and NRII), which were seeded by sludge from different sources and operated under different operating conditions, were found to possess distinct dominant ammonia-oxidizing microorganisms. Ammonia-oxidizing archaeal (AOA) amoA genes outnumbered ammonia-oxidizing bacterial (AOB) amoA genes in reactor ...
Papitchaya, Srithep, Preeyaporn, Pornkulwat, Tawan, Limpiyakorn   +2 more
openaire   +2 more sources

c-Cytochromes of the ammonia-oxidizing chemolithoautotrophic bacteria

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1991
The major enzymes associated with the oxidation of ammonia by chemolithoauthotrophic bacteria are studied, including some cytochromes c , are described and details of their properties are given.
A B, Hooper, M, Logan, D M, Arciero, H, McTavish   +3 more
openaire   +2 more sources

Robust Nitritation Sustained by Acid-Tolerant Ammonia-Oxidizing Bacteria

Environmental Science & Technology, 2021
Oxidation of ammonium to nitrite rather than nitrate, i.e., nitritation, is critical for autotrophic nitrogen removal. This study demonstrates a robust nitritation process in treating low-strength wastewater, obtained from a mixture of real mainstream sewage with sidestream anaerobic digestion liquor.
Zhiyao Wang, Min Zheng, Jia Meng, Zhetai Hu, Gaofeng Ni, Angelica Guerrero Calderon, Huijuan Li, Haydee De Clippeleir, Ahmed Al-Omari, Shihu Hu, Zhiguo Yuan   +10 more
openaire   +2 more sources

Ammonia-Oxidizing Bacteria: A Model for Molecular Microbial Ecology

Annual Review of Microbiology, 2001
▪ Abstract  The eutrophication of many ecosystems in recent decades has led to an increased interest in the ecology of nitrogen transformation. Chemolitho-autotrophic ammonia-oxidizing bacteria are responsible for the rate-limiting step of nitrification in a wide variety of environments, making them important in the global cycling of nitrogen.
Kowalchuk, G.A., Stephen, J.R.
openaire   +2 more sources

In situ Identification of Ammonia-oxidizing Bacteria

Systematic and Applied Microbiology, 1995
Summary A 16S rRNA-targeted oligonucleotide probe (NEU) specific for some representatives of the lithoautotrophic ammonia-oxidizing bacteria was developed based on comparative sequence analysis. Whole cell hybridization of target cells in combination with digital microscopy was used to determine the optimal hybridization stringency.
Michael Wagner, Gabriele Rath, Rudolf Amann, Hans-Peter Koops, Karl-Heinz Schleifer   +4 more
openaire   +1 more source

Diversity and Abundance of Ammonia-Oxidizing Bacteria and Ammonia-Oxidizing Archaea During Cattle Manure Composting

Microbial Ecology, 2010
Ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) play important roles in nitrification in various environments. They may also be key communities for ammonia oxidation in composting systems, although few studies have discussed their presence. We investigated the relative diversity and abundance of AOB and AOA using cloning procedures,
Nozomi, Yamamoto, Kenichi, Otawa, Yutaka, Nakai   +2 more
openaire   +2 more sources

Mutualism between autotrophic ammonia-oxidizing bacteria (AOB) and heterotrophs present in an ammonia-oxidizing colony

Archives of Microbiology, 2013
Coexistence of an autotrophic ammonia-oxidizing bacterium (Nitrosomonas sp. RA) and heterotrophic bacteria was consistently observed when cultured in an inorganic medium without any external supply of organic carbon. The present study was undertaken to understand the association between autotrophs and the associated heterotrophs for which a system ...
Radhika, Keluskar, Anuradha, Nerurkar, Anjana, Desai   +2 more
openaire   +2 more sources

Functional Gene Hybridization Patterns of Terrestrial Ammonia-Oxidizing Bacteria

Microbial Ecology, 1998
Abstract The biochemical pathway and genetics of autotrophic ammonia oxidation have been studied almost exclusively in Nitrosomonas europaea. Terrestrial autotrophic ammonia-oxidizing bacteria (AAOs), however, comprise two distinct phylogenetic groups in the beta-Proteobacteria, the Nitrosomonas and Nitrosospira groups. Hybridization patterns were used
, Bruns, , Fries, , Tiedje, , Paul
openaire   +2 more sources

Ammonia-oxidizing activity and microbial structure of ammonia-oxidizing bacteria, ammonia-oxidizing archaea and complete ammonia oxidizers in biofilm systems with different salinities

Bioresource Technology
Ammonia-oxidizing activity of different ammonia-oxidizing microorganisms (AOMs), such as ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA), and complete ammonia oxidizers (comammoxs), were investigated by adding the inhibitors such as 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide, octyne, and KCLO3 in biofilm systems with ...
Haojie Qiu, Weihua Zhao, Yingying Qin, Yanyan Wang, Meng Bai, Shaoqing Su, Chao Wang, Zhisheng Zhao   +7 more
openaire   +2 more sources