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Full-Text Articles in Microbiology
Impacts Of Soil Management On Microbial Assemblages Involved In Nitrogen Transformations In Agroecosystems In Tennessee, Usa, Jialin Hu
Doctoral Dissertations
Nutrient reduction, particularly with respect to nitrogen (N) losses, is an important goal for sustainably managed agroecosystems. Soil N-cycling microbial populations that modulate these processes are affected by agricultural management regimes. This research focused on the controls and dynamics of the major N-cycling microbial populations in high-input cotton field under agricultural management regimes and low-input native C4 forage grass systems under pasture management practices to determine the effects of management regimes on in situ seasonal dynamics of the functional microbes responsible for N fixation, nitrification, and denitrification processes. Molecular microbial ecology methods were combined with soil physicochemical properties and …
Complete Denitrification By The Non-Denitrifier Anaeromyxobacter Dehalogenans: The Role Of Coupled Biotic-Abiotic Reactions, Jenny Rae Onley
Complete Denitrification By The Non-Denitrifier Anaeromyxobacter Dehalogenans: The Role Of Coupled Biotic-Abiotic Reactions, Jenny Rae Onley
Doctoral Dissertations
Nitrous oxide (N2O) is a potent greenhouse gas and ozone-depleting substance produced by many different pathways in the nitrogen cycle, including nitrification, denitrification, and chemodenitrification. Abiotic sources of N2O such as the chemical reaction between nitrite (NO2-) and ferrous ion (Fe[II]) are generally neglected in studies of N turnover in soils. Abiotic controls containing nitrate (NO3-) and ferric iron (Fe[III]) fail to capture potential reactions between intermediates of N cycle pathways (e.g., NO2- as an intermediate in NO3 - reduction to ammonium [NH4+] or …
Detection, Diversity, And Evolution Of Fungal Nitric Oxide Reductases (P450nor), Steven Adam Higgins
Detection, Diversity, And Evolution Of Fungal Nitric Oxide Reductases (P450nor), Steven Adam Higgins
Doctoral Dissertations
Nitrous oxide (N2O) is a gas responsible for significant ozone layer depletion and contributes to greenhouse effects in Earth’s atmosphere. N2O is primarily generated by denitrification, whereby nitrate (NO3-) or nitrite (NO2-) is converted to gaseous N2O or N2. Teragram quantities of N2O are emitted annually from agricultural soils treated with nitrogenous fertilizers due to the activity of soil microbiota. Although bacteria and fungi harbor genes permitting denitrification, fungi lack NosZ, an enzyme responsible for reducing N2O into inert N2 gas. Historically, scientists have linked fungi …
Exploring Enrichment Cultures Of Denitrifying Microorganisms From El Yunque National Forest, Samiha Ahsan, Jenny Onley, Frank Loeffler
Exploring Enrichment Cultures Of Denitrifying Microorganisms From El Yunque National Forest, Samiha Ahsan, Jenny Onley, Frank Loeffler
Chancellor’s Honors Program Projects
No abstract provided.