نتایج جستجو برای: the effect of azotobacter inoculum azotobacter chroococcum
تعداد نتایج: 22819986 فیلتر نتایج به سال:
Methods employed in the study of the fluorescent culture filtrates of Azotobacter are described. The use of a fluorescence meter in the characterization of the fluorescent substances elaborated by Azotobacter agile, Azotobacter vinelandii, and Azotobacter macrocytogenes n. sp. is discussed. A. macrocytogenes, a fluorescent species, is included with the two previously reported fluorescent Azotob...
Vanadium K-edge X-ray-absorption spectra were collected for samples of thionine-oxidized, super-reduced (during enzyme turnover) and dithionite-reduced VFe-protein of the vanadium nitrogenase of Azotobacter chroococcum (Acl*). Both the e.x.a.f.s and the x.a.n.e.s. (X-ray-absorption near-edge structure) are consistent with the vanadium being present as part of a VFeS cluster; the environment of ...
Ferredoxin from Azotobacter chroococcum has been studied by low-temperature magnetic-circular-dichroism and electron-paramagnetic-resonance spectroscopy. When aerobically isolated ferredoxin contains a [3Fe-4S] and [4Fe-4S] cluster. Anaerobic treatment with dithionite in the presence of ethanediol reduces the [3Fe-4S] cluster to give two spectroscopically distinct forms RI and RII which are rev...
Nucleotide sequence was obtained for a region of 7,099 bp spanning the nifU, nifS, nifV, nifW, nifZ, and nifM genes from Azotobacter chroococcum. Chromosomal mutations constructed at several sites within the locus confirmed a requirement for this region for expression of the molybdenum nitrogenase in this organism. The genes are tightly clustered and ordered as in Klebsiella pneumoniae except f...
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