Results 251 to 260 of about 118,179 (294)
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2011
This chapter focuses on very recent developments and their implications for nitrogen cycling in the marine environment. Nitrification does not influence the net N inventory of the ocean directly except by small losses to the gaseous pool of nitrous oxide, but it does determine the distribution of N among important dissolved inorganic nitrogen pools ...
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This chapter focuses on very recent developments and their implications for nitrogen cycling in the marine environment. Nitrification does not influence the net N inventory of the ocean directly except by small losses to the gaseous pool of nitrous oxide, but it does determine the distribution of N among important dissolved inorganic nitrogen pools ...
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Biological inhibition of soil nitrification by forest tree species affects Nitrobacter populations.
Environmental Microbiology, 2019Some temperate tree species are associated with very low soil nitrification rates, with important implications for forest N dynamics, presumably due to their potential for biological nitrification inhibition (BNI).
Amandine Laffite +10 more
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Kinetics of biofilm nitrification
Biotechnology and Bioengineering, 1982AbstractThe reaction rates (r and r) in the two‐step nitrification reaction were measured in a fluidized‐sand‐bed biofilm reactor under a range of steady‐state conditions with respect to bulk NH, NO, and O2 concentrations. It was shown from theory and experiment that under low NH concentration conditions, if the O2/NH concentration ratio in the bulk ...
I. J. Dunn, H. Tanaka
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Nitrification in Paleocene Shale
Science, 1974Exchangeable ammonium nitrogen is present in Paleocene (Fort Union) shale below a depth of 10 meters in North Dakota and eastern Montana. Above 10 meters, exchangeable ammonium nitrogen is nitrified in situ. The lack of viable nitrifying organisms and the probable lack of oxygen prevent in situ nitrification below 10 meters.
J. J. Bond +3 more
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Canadian Journal of Microbiology, 1990
Complete oxidation of ammonia nitrogen (~1000 mg/L) to nitrite was observed in stabilized swine waste after 49 days in incubation at 400 rpm and 29 °C, only if 10% (v/v) activated sludge from a wastewater treatment unit and 1.5% (w/v) CaCO3, were added.
M. Blouin +3 more
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Complete oxidation of ammonia nitrogen (~1000 mg/L) to nitrite was observed in stabilized swine waste after 49 days in incubation at 400 rpm and 29 °C, only if 10% (v/v) activated sludge from a wastewater treatment unit and 1.5% (w/v) CaCO3, were added.
M. Blouin +3 more
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The Nitrification of the Soil [PDF]
, 1984 Up to about the middle of the nineteenth century the soil had generally been regarded as a static system to which fertilisers were added, and which afforded anchorage to plant life, but there were some who believed, without any experimental proof, that the air provided some of the nutriment of the plant.
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Nitrification and denitrification in the rhizosphere [PDF]
Bulletin de la Société Botanique de France, 1975 ResumeLa 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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1999
Although nitrifying bacteria usually receive little attention, primarily because they are very difficult to work with, they play a major role in structuring our environment (Abeliovich 1992), directly by affecting the rate of nitrogen recycling, and indirectly through their role in global climatic processes.
Drora Kaplan, Aharon Abeliovich
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Although nitrifying bacteria usually receive little attention, primarily because they are very difficult to work with, they play a major role in structuring our environment (Abeliovich 1992), directly by affecting the rate of nitrogen recycling, and indirectly through their role in global climatic processes.
Drora Kaplan, Aharon Abeliovich
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, 2015
The use of nitrification inhibitors (NI) is a technique which is able to improve N fertilizer use efficiency, to reduce nitrate leaching and to decrease the emission of the climate‐relevant gas N₂O simultaneously, particularly in moderately fertilized ...
R. Ruser, R. Schulz
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The use of nitrification inhibitors (NI) is a technique which is able to improve N fertilizer use efficiency, to reduce nitrate leaching and to decrease the emission of the climate‐relevant gas N₂O simultaneously, particularly in moderately fertilized ...
R. Ruser, R. Schulz
semanticscholar +1 more source
Autotrophic Nitrification in Bacteria
1990Publisher Summary This chapter highlights the physiology of autotrophic ammonia- and nitrite-oxidizing bacteria. Several aspects of the physiology of nitrifiers of relevance to their growth and activity in natural environments are considered. The chapter describes the basic features of the biochemistry of ammonia and nitrite oxidation and discusses ...
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