Results 31 to 40 of about 1,066,674 (283)

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

open access: yesApplied 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.   +3 more
openaire   +3 more sources

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

open access: yesAgriculture, 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

Analysis of ammonia-oxidizing bacteria associated with the roots of Proteaceae plant species in soils of Fynbos ecosystem [PDF]

open access: yes, 2005
>Magister Scientiae - MScMolecular methods were used to investigate the microbial diversity and community structure of ammonia-oxidizing bacteria (AOB) associated with the roots of the Proteaceae plant family.

core   +1 more source

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

open access: yesFrontiers 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   +4 more
doaj   +1 more source

Multiple approaches to enhance the cultivability of bacteria associated with the marine sponge Haliclona (gellius) sp [PDF]

open access: yes, 2011
Three methods were examined to cultivate bacteria associated with the marine sponge Haliclona (gellius) sp.: agar plate cultures, liquid cultures, and floating filter cultures.
Yang, Y.   +11 more
core   +1 more source

A Potentiometric Flow Biosensor Based on Ammonia-Oxidizing Bacteria for the Detection of Toxicity in Water [PDF]

open access: yes, 2013
A flow biosensor for the detection of toxicity in water using the ammonia-oxidizing bacterium (AOB) Nitrosomonas europaea as a bioreceptor and a polymeric membrane ammonium-selective electrode as a transducer is described.
Zhang, Qianyu   +7 more
core   +1 more source

Community ecology of denitrifying bacteria in arable land [PDF]

open access: yes, 2008
Denitrifying bacteria comprise a functional guild that under anaerobic conditions is able to use nitrogenous compound for respiration. Agricultural soils are often fertilized with nitrogen, and the reduction of nitrate and nitrite to nitric oxide ...
Enwall, Karin
core   +1 more source

Nitric oxide scavengers differentially inhibit ammonia oxidation in ammonia-oxidizing archaea and bacteria [PDF]

open access: yesFEMS Microbiology Letters, 2016
Differential inhibitors are important for measuring the relative contributions of microbial groups, such as ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA), to biogeochemical processes in environmental samples. In particular, 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (PTIO) represents a nitric oxide scavenger used for ...
Laura A, Sauder   +2 more
openaire   +2 more sources

Microbiological analysis of the population of extremely haloalkaliphilic sulfur-oxidizing bacteria dominating in lab-scale sulfide-removing bioreactors [PDF]

open access: yes, 2008
Thiopaq biotechnology for partial sulfide oxidation to elemental sulfur is an efficient way to remove H2S from biogases. However, its application for high-pressure natural gas desulfurization needs upgrading.
Abbas, B. (author)   +15 more
core   +2 more sources

Freshwater Ammonia-Oxidizing Archaea Retain amoA mRNA and 16S rRNA during Ammonia Starvation

open access: yesLife, 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

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