Results 251 to 260 of about 97,689 (295)
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Denitrification capacity and denitrification potential of subsurface soils
Communications in Soil Science and Plant Analysis, 1992Abstract Although numerous studies of denitrification in surface soils have been reported, few attempts have been made to study denitrifying activity in subsurface soils. We collected samples of four Iowa soil profiles to a depth of 3 m and measured their population of denitrifying bacteria and their capacity and potential for denitrification.
J. C. Yeomans +2 more
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Metalloenzymes of the denitrification pathway
Journal of Inorganic Biochemistry, 2006Denitrification, or dissimilative nitrate reduction, is an anaerobic process used by some bacteria for energy generation. This process is important in many aspects, but its environmental implications have been given particular relevance. Nitrate accumulation and release of nitrous oxide in the atmosphere due to excess use of fertilizers in agriculture ...
P, Tavares +3 more
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Canadian Journal of Microbiology, 1978
Thirty-three strains of Rhizobium were examined for their reduction of nitrate under anoxic conditions. Three patterns of dissimilatory nitrate reduction were observed: (1) reduction to N2O and N2 (denitrification), (2) reduction to and subsequent accumulation of NO2− (nitrate respiration), (3) no reduction. Strains of R.
R M, Zablotowicz, D L, Eskew, D D, Focht
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Thirty-three strains of Rhizobium were examined for their reduction of nitrate under anoxic conditions. Three patterns of dissimilatory nitrate reduction were observed: (1) reduction to N2O and N2 (denitrification), (2) reduction to and subsequent accumulation of NO2− (nitrate respiration), (3) no reduction. Strains of R.
R M, Zablotowicz, D L, Eskew, D D, Focht
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The Enzymes Associated with Denitrification
Annual Review of Microbiology, 1988NASA: The enzymes involved in the reduction of nitrogenous oxides are thought to be intermediates in denitrification processes. This review examines the roles of nitrate reductase, nitrite reductases, nitric oxide reductase, mechanisms of N-N bond formation, and nitrous oxide reductases.
L I, Hochstein, G A, Tomlinson
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Nitrification and denitrification in the rhizosphere
Bulletin de la Société Botanique de France, 1975ResumeLa nitrification est generalement ralentie dans la rhizosphere. Cela peut etre du a la secretion de substances toxiques par les racines ou a l'immobilisation acceleree de l'ion ammonium.Les agents et les facteurs de la denitrification sont passes en revue et l'importance de ce phenomene au voisinage des racines est longuement discutee.
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Autotrophic Denitrification Processes
2017Effluents coming from anaerobic digesters are characterized by a COD/N ratio between 2 and 10, high ammonia NH4+ concentrations about 500 mg/L and a temperature range of 25-35 ºC. To remove nitrogen from these effluents biological processes as the autotrophic denitrification with sulfur compounds, hydrogen or methane can be applied.
Belmonte, Marisol +7 more
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Nitrite Reductases in Denitrification
2007Nitrite reductase (NIR) is a key enzyme in the dissimilatory denitrification chain, catalyzing the reduction of NO2 - to NO. Although a matter of debate for a long time, NO is now accepted product of NO2 --reduction as an obligatory intermediate in most denitrifiers, and it is further reduced to N2O by NO reductase. Purification and characterization of
RINALDO, Serena, CUTRUZZOLA', Francesca
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Denitrification and its control
Antonie van Leeuwenhoek, 1994Denitrification in bacteria comprises a series of four reduction reactions; for nitrate, nitrite, nitric oxide and nitrous oxide. Nitrogen gas is the final product. The nature of the enzymes catalysing these reactions is described along with the the properties of the underlying electron transport systems.
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