Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"DNRA"”.
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Management, microbiology, and machine learning: A systems approach to evaluating the nitrogen cycling microbiome in agricultural soils
… dissimilatory nitrate reduction to ammonium (DNRA), a process previously assumed unimportant in terrestrial soils, can occur under both canonical highly reducing conditions as well as oxic conditions within the same soil. I close by synthesizing the body of literature reporting DNRA under oxic …
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Nitrous Oxide Production in Agricultural Soil – Linking Biogeochemical Pathways and Drivers
… and dissimilatory nitrate reduction to ammonium (DNRA), which determines the fate of NO3- in soil. A perennial cropping system that maintains high SOM contents and C/NO3- ratios has shaped the microbial community of dissimilatory nitrate reducers leading to higher N retention by DNRA and lower N2O …
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Expansion of Deltaproteobacteria diversity from marine sediment reveals unique metabolic features
… and dissimilatory nitrate reduction to ammonia (DNRA). Metabolic inference of Deltaproteobacteria MAGs reveals extensive versatility, central carbon metabolism, and a broad distribution of the Wood-Ljungdahl pathway for CO2 fixation. 54% of Deltaproteobacteria MAGs encode dissimilatory sulfite …
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Mikrobiologie der Stickstoffentfernung in den Biofiltern einer marinen Aquakultur mit geschlossenem Wasserkreislauf
… die Prozesse der Denitrifikation und der DNRA in den anaeroben Teilen der Anlage zu quantifizieren, Nitratreduzierer und Denitrifikanten zu identifizieren und zu isolieren sowie ihre Reaktion auf Sulfid als einem systemrelevanten Faktor genauer zu untersuchen. Sowohl Denitrifikation als …
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Microbial Dynamics and Mechanistic Insights into a Hydrogenotrophic Denitrifying Microbial Consortium
… the dissimilatory nitrate reduction to ammonium (DNRA) process. By understanding and manipulating specific microbial interactions within a hydrogenotrophic consortium, this thesis research contributes to the advancement of zero-emissions biological denitrification systems in wastewater treatment …
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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
… and dissimilatory nitrate reduction to ammonium (DNRA), soil microbial communities play an active role in determining the fate of nitrogenous species, thus thorough knowledge of microbial community structure and function is important to understanding ecosystem scale N-fluxes. While much work has …
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Effects of drift macroalgae on sediment nitrogen cycling in Thalassia testudinum beds of St. Joseph Bay, FL
… the sediment-water interface. Results shows that DNRA (dissimilatory nitrate reduction to ammonium) rates were similar in magnitude to denitrification rates in areas with and without macroalgae, showing similar rates of N removal and recycling within sediments. Anammox rates were a minor source of …
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The influence of redox dynamics on nitrogen cycling and nitrous oxide emissions from soils
… and dissimilatory reduction to nitrate (DNRA) rates. It was observed an asymmetrical behavior between nitrogen and ammonium profiles. Experiments shown that this assimetry is a function of the degree of saturation (as well as its duration). Also the fraction of the total N2O that is …
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Impacto de la variabilidad ambiental en zonas acuáticas someras: Efecto sobre el metabolismo neto y flujos sedimento-agua en la zona intermareal.
… procesos anaerobios como desnitrificación o DNRA. Los análisis metagenómicos mostraron un aumento de genes de desnitrificación y de metanógenos termotolerantes en los tratamientos de mayor temperatura. El flujo de óxido nitroso hacia la columna de agua alcanzó su máximo a temperaturas …
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Microbiome Metabolism in the Rumen of Bovine Grazing Toxic Tall Fescue and in Stored Dairy Manure
… ammonia via dissimilatory nitrite reduction (DNRA) seemed possible. Minor quantity of nitrate was present in manure, potentially originating from oxidative processes occurring on the barn floor. Higher prevalence of nitrate-transforming microbes at the near-surface locations and all depths of …