Results 111 to 120 of about 108,045 (162)
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2008
Introduction 1 Nitrogen-Fixing Organisms 2 Nitrogenase and Nitrogen Fixation 2 Ammonia Assimilation 4 Diazothrophic Bacteria – Plant Symbioses 4 Rhizobia–Legume Symbiosis 4 Frankia-Dicotyledon Symbiosis 6 Endophytic Diazotrophic Bacteria–Cereal Association 9 Nitrogen Fixation in Free-Living Cyanobacteria 9 Diazotrophic Cyanobacteria–Plant Symbioses 10 ...
RASCIO, NICOLETTA, LA ROCCA, NICOLETTA
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Introduction 1 Nitrogen-Fixing Organisms 2 Nitrogenase and Nitrogen Fixation 2 Ammonia Assimilation 4 Diazothrophic Bacteria – Plant Symbioses 4 Rhizobia–Legume Symbiosis 4 Frankia-Dicotyledon Symbiosis 6 Endophytic Diazotrophic Bacteria–Cereal Association 9 Nitrogen Fixation in Free-Living Cyanobacteria 9 Diazotrophic Cyanobacteria–Plant Symbioses 10 ...
RASCIO, NICOLETTA, LA ROCCA, NICOLETTA
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Science, 1973
Nitrogen fixation, measured by the reduction of acetylene to ethylene, was found in workers of the dry-wood termite Kalotermes minor . The soldiers and reproductive castes fixed little or no nitrogen. The fixation rates ranged between 24 and 566 micrograms of nitrogen fixed per month per gram (wet weight) of termite.
James W. Mertins +3 more
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Nitrogen fixation, measured by the reduction of acetylene to ethylene, was found in workers of the dry-wood termite Kalotermes minor . The soldiers and reproductive castes fixed little or no nitrogen. The fixation rates ranged between 24 and 566 micrograms of nitrogen fixed per month per gram (wet weight) of termite.
James W. Mertins +3 more
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Nature, 1972
Genetic analysis of nitrogen fixation in free-living bacteria is being used to elucidate processes which in the plant root depend on a complex symbiotic relationship. Increased understanding of the nitrogen fixation mechanism will eventually help to increase the world resources of protein.
Stanley L. Streicher +4 more
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Genetic analysis of nitrogen fixation in free-living bacteria is being used to elucidate processes which in the plant root depend on a complex symbiotic relationship. Increased understanding of the nitrogen fixation mechanism will eventually help to increase the world resources of protein.
Stanley L. Streicher +4 more
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Science, 1959
Incorporation of N 15 into the fixed nitrogen fraction of natural lake waters has been studied for the purpose of estimating rates of primary nitrogen fixation. Experiments in Pymatuning Reservoir, Pennsylvania, in Lake Mendota, Wisconsin, and in two lakes in Alaska indicate that fixation occurs at measurable ...
Vera A. Dugdale +3 more
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Incorporation of N 15 into the fixed nitrogen fraction of natural lake waters has been studied for the purpose of estimating rates of primary nitrogen fixation. Experiments in Pymatuning Reservoir, Pennsylvania, in Lake Mendota, Wisconsin, and in two lakes in Alaska indicate that fixation occurs at measurable ...
Vera A. Dugdale +3 more
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Nitrogen fixation in cyanobacteria
2008Cyanobacteria are oxygenic photosynthetic bacteria that are widespread in marine, freshwater and terrestrial environments, and many of them are capable of fixing atmospheric nitrogen. However, ironically, nitrogenase, the enzyme that is responsible for the reduction of N2, is extremely sensitive to O2. Therefore, oxygenic photosynthesis and N2 fixation
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Journal of Applied Bacteriology, 1974
Summary. The acetylene reduction technique was used for a 3‐year period to monitor potential nitrogen fixation by aerobic heterotrophic bacteria in the sea 2 miles offshore in Cardigan Bay. Samples from depths down to 15 m were membrane‐filtered and the residues incubated aerobically or anaerobically in acetylene‐containing gas mixtures in sealed ...
Muriel E. Rhodes, D. D. Wynn-Williams
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Summary. The acetylene reduction technique was used for a 3‐year period to monitor potential nitrogen fixation by aerobic heterotrophic bacteria in the sea 2 miles offshore in Cardigan Bay. Samples from depths down to 15 m were membrane‐filtered and the residues incubated aerobically or anaerobically in acetylene‐containing gas mixtures in sealed ...
Muriel E. Rhodes, D. D. Wynn-Williams
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Annual Review of Nutrition, 1993
Biological nitrogen fixation (BNF) is the process of the reduction of dinitrogen from the air to ammonia carried out by a large number of species of free-living and symbiotic microbes called diazotrophs. BNF presents an inexpensive and environmentally sound, sustainable approach to crop production and constitutes one of the most important Plant Growth ...
Gary P. Roberts, Robert H. Burris
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Biological nitrogen fixation (BNF) is the process of the reduction of dinitrogen from the air to ammonia carried out by a large number of species of free-living and symbiotic microbes called diazotrophs. BNF presents an inexpensive and environmentally sound, sustainable approach to crop production and constitutes one of the most important Plant Growth ...
Gary P. Roberts, Robert H. Burris
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1995
Publisher Summary The conversion of the inert nitrogen molecule into combined nitrogen that can be utilized as a mineral nutrient is brought about either by reduction to ammonia or oxidation to nitrate. This conversion, also referred to as fixation, is highly energy consuming. This is the main focus of this chapter.
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Publisher Summary The conversion of the inert nitrogen molecule into combined nitrogen that can be utilized as a mineral nutrient is brought about either by reduction to ammonia or oxidation to nitrate. This conversion, also referred to as fixation, is highly energy consuming. This is the main focus of this chapter.
openaire +3 more sources