Global ETD Search
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Showing 1 to 17 of 17 for “"amoA"”.
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Molekulare und physiologische Charakterisierung des Energiestoffwechsels von Nitrosomonas europaea
… Enzym und besteht aus den Untereinheiten AmoA (27 kDa), AmoB (42 kDa) und Cytochrom c1 (24 kDa). Das Enzym weist dabei eine heterotrimere Alpha3-Beta3-Gamma3-Untereinheitenstrukur mit einer molekularen Masse von etwa 316 kDa auf. Die AmoB-Untereinheit der löslichen AMO besitzt dabei eine …
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Perennial energy crops on riparian buffers affect nitrogen cycling microbial communities
… functional groups involved in ammonia oxidation (amoA), nitrite ammonification (nrfA), denitrification (nirK, nirS, norB, and nosZ), and N fixation (nifH). The results indicated that N application significantly affected the abundance of four different functional enzyme groups. The abundance of …
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Bedeutung der Baumart für die Aktivität, Diversität und Abundanz methanoxidierender Bakterien in temperaten Waldböden
… die nur entfernt verwandt zu bekannten PmoA-/AmoA-Sequenzen waren. In Fichtenwaldböden waren dagegen nur vier USCα-OTUs sowie Cluster 6 detektierbar. Die erniedrigte Diversität Methanotropher in Fichtenwaldböden wurde durch statistische Analysen bestätigt. Genfragmente von mmoX und der pmoA …
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Evaluación de comunidades microbianas en suelos semiáridos del sur-oeste bonaerense, bajo distintos sistemas de manejo agrícola
… se evaluó en los suelos la presencia del gen amoA que codifica para el sitio activo de la enzima Amonio Monooxigenasa, y de los genes que codifican para las enzimas de las diferentes etapas de la desnitrificación, y se aislaron y caracterizaron bacterias potencialmente desnitrificantes. …
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Geomicrobiology of nitrogen in a coastal aquifer : isotopic and molecular methods to examine nitrification and denitrification in groundwater
… (AOA) based on the ammonia monooxygenase gene (amoA), one shallow population most closely related to open ocean water column-like sequences and a deeper population that is more closely related to estuarine-like AOA. Interestingly, while the surface population has a potential nitrification rates …
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Geomicrobiology of nitrogen in a coastal aquifer : isotopic and molecular methods to examine nitrification and denitrification in groundwater
… (AOA) based on the ammonia mono-oxygenase gene (amoA), one shallow population most closely related to open ocean water column-like sequences and a deeper population that is more closely related to estuarine-like AOA. Interestingly, while the surface population has a potential nitrification rates …
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Stream microbial communities along an agricultural gradient
… diversity; and quantitative PCR (qPCR) on amoA, a subunit of the nitrifying gene ammonia monooxygenase, measured nitrifier abundance. A geographic information system (ArcGIS) was used to determine the percentage of agricultural land within each of the ten sampled tributary drainages; these …
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Characterization of the prokaryotic community associated with the giant barrel sponge, Xestospongia muta across the Caribbean
… cycling including nifH (nitrogen fixation), amoA (ammonia oxidation), norB (denitrification), and nirK (denitrification). Nitrogen cycling in X. muta appears to be more complex than previous studies have shown. These results have important ecological implications for the understanding of …
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Biogeochemical and ecological responses to warming climate in High Arctic polar deserts
… methane (CH4) emissions. With higher archaeal amoA abundance, diapiric frost boils had a higher magnitude of the emissions leading to a higher estimate of the emissions under dry conditions. On the other hand, a higher estimate of the emissions from diapiric frost boils linked to a higher …
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Investigation of Factors Influencing Niche Differentiation of Ammonia-oxidizing Archaea and Bacteria in Freshwater Environments
… two months of starvation while maintaining <i>amoA</i> mRNA and 16S rRNA, however the AOB was able to recover from starvation faster. The results from these experiments suggest that, within the ammonia-oxidizers, AOB represent a copiotrophic lifestyle and will thrive in conditions of pulses of …
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Responses of Nitrifying Bacteria to Aquaculture Chemotherapeutic Agents
… in the observation that the expression of amoA was upregulated by the copper exposure and inhibited by oxytetracycline and Romet-30®, but began to resume as the antibiotics degraded. Comprehensively, the findings of these analyses demonstrated that, although nitrifiers are well-known to be …
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The effects of invasive European Buckthorn (Rhamnus cathartica) on soil microbial community composition
… sites had higher abundance of Archaeal amoA (ammonia oxidizer) genes than uninvaded sites, but there were no significant differences detected in any of the other nitrogen-cycling functional groups. However, regression analysis suggested that the abundance of archaeal nitrifiers was not …
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Aluta Continua: Social Movements and the Making of Ghana's Fourth Republic, 1978 - 1993
… study has addressed this blatant omission. Sakyi Amoa is the only scholar who has done some substantive work on student movements in Ghana ("Ghanaian University Students," 1969; University Students' Political Action in Ghana, 1979). However, his work did not explore the relations between civil …
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Soil quality and nitrogen cycling dynamics altered by fertility amendments in intensively managed vegetable production systems
… structure of bacterial ammonia monooxygenase (amoA) and nirK were quantified in bulk and rhizosphere soil samples collected from open field plots. In 2011, chard yield was lower in the high tunnel than the open field system, while pepper yield was greater in the high tunnel in 2012 and 2013. …
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Microbial nitrogen-cycling and cooperation in the terrestrial subsurface
… ammonia oxidation (ammonia monooxygenase, amoA), which could represent a major source of nitrite for anammox. This trend was confirmed with metatranscriptomic data, which revealed the co-occurrence of aerobic (nitrification, including ammonia oxidation) and anaerobic (denitrification, …
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Evaluation of seasonal impacts on nitrifiers and nitrification performance of a full-scale activated sludge system
Submitted in complete fulfillment for the degree of Doctor of Philosophy (Biotechnology), Durban University of Technology, Durban, South Africa, 2016.
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Intact soil core experiments reveal that temperature and depth influence microbial community function and impact the fate of nitrogenous fertilizer amendments
The application of nitrogenous fertilizer to agricultural soil has potentially large impacts on environmental quality, including large scale emission of the potent greenhouse gas nitrous oxide and runoff of nitrates. Through their metabolic activities, including nitrification, denitrification and …