Results 181 to 190 of about 14,221 (217)
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Dinitrogen Complexes and Nitrogen Fixation
1971The formation of dinitrogen complexes from nitrogen gas is the only definite reaction of molecular nitrogen which is known to occur at ordinary temperature and pressure with reagents sufficiently mild to exist in water and other protic media. This reaction thus provides at present the only reasonable chemical model for the initial uptake of dinitrogen ...
J. Chatt, R. L. Richards
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The Biochemistry of Dinitrogen Fixation
1981Biochemical exploration of the metabolic pathway of dinitrogen reduction has produced a wealth of information, from which, to cope with the available space, only recent data pertinent to the enzyme itself will be presented. Developments until about 1975/1976 were discussed in detail at two occasions (Zumft and Mortenson, 1975; Zumft 1976) akin to many ...
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Genetics of Dinitrogen Fixation
1981The only organism that has been used for the detailed analysis of the genes involved with dinitrogen fixation (nif genes) is Klebsiella pneumoniae. This organism is closely related to the well-studied Escherichia coli and Salmonella typhimurium. Unlike these latter species, certain K.
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Energetics of microbial fixation of dinitrogen
1982I review metabolic sources of reductant and ATP used by nitrogenase for all known classes of metabolism occurring among N2-fixing organisms. The discussion centers on free-living organisms preferentially over symbionts. I quantify the amounts of substrate required and convert these to free-energy efficiencies; anaerobes are seen as efficient in this ...
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Calcium, Dinitrogen Fixation and Calmodulin in a Nostoc.
1991Four inhibitors of Calmodulin and other calcium binding proteins, have been used to probe the calcium mediated effects upon dinitrogen fixation, heterocyst frequency and the intracellular calcium content of Nostoc 6720. The inhibitors both enhance and depress dinitrogen fixation depending upon their concentration, but do not significantly affect the ...
L. A. Onek, P. J. Lea, R. J. Smith
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Fixation of Dinitrogen by Free-Living Microorganisms
CRC Critical Reviews in Microbiology, 1974AbstractThe purpose of this article is not to review exhaustively all that is known about nitrogen-fixing microbes but to provide a reasonable coverage of more recent discoveries in the field. It is primarily concerned with the microbiology of the free-living nitrogen-fixing organisms, although casual reference to symbiotic systems has been made.
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Some Aspects of the Physiology of Dinitrogen Fixation
1981The physiology of an organism, or of a biological process, results from the integration of its biochemical and genetic features in the living organism. It can be approached descriptively, by a study of the responses of the organism or process to environmental changes, but more sophisticated understanding of physiology requires the integration of ...
J. R. Postgate +8 more
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Dinitrogen Fixation (ARA) in Lobaria Pulmonaria
1991Dinitrogen fixation in lichens has been largely proved (Kershaw and Millbank, 1970; Pike et al., 1972) and the fixing rates in different ecosystems like tundra (Kallio, 1976) and Pseudotsuga menziesii forests (Denison, 1979) are known, although its role in nitrogen retraining is not completely demonstrated.
M. A. Monsalve, F. Bermudez De Castro
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