Results 121 to 130 of about 108,045 (162)
Some of the next articles are maybe not open access.
Enzymology of nitrogen fixation
Trends in Biochemical Sciences, 1984Abstract Progress made during the last eight years with respect to the nature and function of the Fe/S clusters present in nitrogenase seems to be impressive. However recent developments may change the picture completely and lead to further research into the molecular mechanism of action of nitrogenase.
Haaker, H., Veeger, C.
openaire +3 more sources
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
Raymond C. Valentine, John R. Benemann
openaire +3 more sources
Journal of Theoretical Biology, 1962
Abstract A theory of N 2 -fixation is developed, based on a consideration of the energy changes involved, in which N 2 is incorporated into an organic molecule. This leads to an explanation of hydrogenase activity and the effect of O 2 in aerobic N 2 -fixers, the absence of inorganic intermediates and the role of organic acids.
openaire +2 more sources
Abstract A theory of N 2 -fixation is developed, based on a consideration of the energy changes involved, in which N 2 is incorporated into an organic molecule. This leads to an explanation of hydrogenase activity and the effect of O 2 in aerobic N 2 -fixers, the absence of inorganic intermediates and the role of organic acids.
openaire +2 more sources
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.
H J Jacob, W Merbach
openaire +3 more sources
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.
openaire +3 more sources
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.
openaire +3 more sources
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,
openaire +2 more sources
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,
openaire +2 more sources
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.
openaire +3 more sources
Fixation of Molecular Nitrogen
1979That microorganisms present in soil are able to assimilate molecular nitrogen was recognized many years ago. The nitrogen gain determined by the Kjeldahl method during growth in a medium free of fixed nitrogen was usually taken as a measure of nitrogen fixation activity.
openaire +2 more sources