Results 261 to 270 of about 1,248,108 (308)
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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.
S L, Streicher +2 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.
S L, Streicher +2 more
openaire +2 more sources
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 ...
R, 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 ...
R, Dugdale +3 more
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Journal of Applied Bacteriology, 1974
S ummary . 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.
D D, Wynn-Williams, M E, Rhodes
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S ummary . 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.
D D, Wynn-Williams, M E, Rhodes
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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 ...
R H, Burris, G P, Roberts
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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 ...
R H, Burris, G P, Roberts
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Nitrogen Fixation and Nitrogen Fertilization of Soybeans
Isotopes in Environmental and Health Studies, 1996Abstract In pot experiments with (15)N labelled soil and mineral (15)N, the influence of Bradyrhizobium (Rhizobium japonicum) inoculation and N fertilization on the symbiotic N(2) fixation and yield of soybeans [Glycine max (L.) Merill., cv. 'Fiskeby V'] was investigated.
W, Merbach, H J, Jacob
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The Pathways of Nitrogen Fixation
1972Publisher Summary Biological nitrogen fixation is the enzymic reduction of atmospheric nitrogen to ammonia. Along with the scientific interest of nitrogen fixation as a fundamental biochemical reaction, it is also of great ecological and agricultural importance because it is the most important source of the metabolizable nitrogen needed by all living
J R, Benemann, R C, Valentine
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Nitrogenase and biological nitrogen fixation
Biochemistry, 1994Biological nitrogen fixation is catalyzed by the nitrogenase enzyme system which consists of two metalloproteins, the iron (Fe-) protein and the molybdenum-iron (MoFe-) protein. Together, these proteins mediate the ATP-dependent reduction of dinitrogen to ammonia.
Kim, Jongsun, Rees, Douglas C.
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1977
The assignment to give an overview of biological N2 fixation implies that we should spend a little time in discussing the history of the subject. It is somewhat over 90 years now since Hellriegel and Wilfarth clearly indicated that biological N2 fixation occurs in leguminous plants.
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The assignment to give an overview of biological N2 fixation implies that we should spend a little time in discussing the history of the subject. It is somewhat over 90 years now since Hellriegel and Wilfarth clearly indicated that biological N2 fixation occurs in leguminous plants.
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2002
This paper discusses the processes of nodulation and nitrogen fixation among Leguminosae tree species usually used in different agroforestry systems. Also included are the microbiological methods for studying rhizobia, the different methods used in determining whether a legume could fix nitrogen, isotope-based methods for nitrogen fixation measurement,
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This paper discusses the processes of nodulation and nitrogen fixation among Leguminosae tree species usually used in different agroforestry systems. Also included are the microbiological methods for studying rhizobia, the different methods used in determining whether a legume could fix nitrogen, isotope-based methods for nitrogen fixation measurement,
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Regulation of Nitrogen Fixation
1978Publisher Summary This chapter discusses the regulation of nitrogen fixation. Both the biosynthesis and the activity of nitrogenase are regulated. The product of N2 reduction, ammonia, through its effect on the biosynthesis of glutamine synthetase, represses nitrogenase synthesis but has no effect on nitrogenase activity.
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