Results 191 to 200 of about 7,054 (243)

Nitrate permease from Azotobacter chroococcum

Physiologia Plantarum, 1993
Active transport systems in bacteria can be divided into two groups: those that are osmotic shock‐resistant with one single membrane protein, and those that are shock‐sensitive and have a membrane‐bound protein complex plus a soluble periplasmic protein.
A. Paneque, M. C. Muñoz‐Centeno, M. T. Ruiz, F. J. Cejudo   +3 more
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Studies on Azotobacter chroococcum

Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Mikrobiologie der Landwirtschaft, der Technologie und des Umweltschutzes, 1981
Summary Seeds of wheat, maize and cotton were inoculated with different strains of A. chroococcum . The performance of the strains was evaluated by conducting sowing experiments with and without basal dressing of fertilizer. Homologous selection of a pigmented strain which established better on roots of that particular crop has shown increase in ...
Rajani Apte, S.T. Shende
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Production of Cyanocobalamine by Azotobacter chroococcum

Zentralblatt für Mikrobiologie, 1984
A strain of Azotobacter chroococcum was found to produce a considerable amount of cyanocobalamine especially when cultivated in a medium enriched with 0.3% ammonium chloride. Maximal production of the vitamin was achieved after six days of incubation in static cultures. The organism required molybdenum, iron (Fe++), cobalt and ascorbic acid for optimal
A A, el-Essawy, M A, el-Sayed, Y A, Mohamed   +2 more
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Phenolic lipid from Azotobacter chroococcum

Chemistry of Natural Compounds, 1977
From the total cell lipids of the nitrogen-fixing bacteriumAzotobacter chroococcum 92 a previously unknown lipid has been isolated which has been identified as a 1-alkyl-3,5-dihydroxybenzene. The alkyl chains of the main components of the lipid fraction have a normal structure and contain 19 and 21 carbon atoms.
S. G. Batrakov, N. N. Pridachina, E. D. Kruglyak, E. D. Novogrudskaya   +3 more
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Nitrite uptake in Azotobacter chroococcum

Archives of Microbiology, 1992
Nitrite uptake is made up of two components in Azotobacter chroococcum, a passive diffusion, presumably of nitrous acid, and an active transport of nitrite which uses the nitrate transport system. Only the active component is under regulatory control.
María T. Ruiz, María C. Muñoz-Centeno, Francisco J. Cejudo, Antonio Paneque   +3 more
openaire   +1 more source

Regulation of Azotobacter chroococcum invertase

Archives of Microbiology, 1991
Synthesis of the Azotobacter chroococcum invertase was found to be dependent on sucrose or raffinose in the growth medium. The activity of this invertase was slightly inhibited by glucose. Fructose, which by itself did not affect the enzyme activity, protected invertase from glucose inhibition.
Mercedes G. de la Vega, Francisco J. Cejudo, Antonio Paneque   +2 more
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Utilization of aromatic substances by Azotobacter chroococcum

Research in Microbiology, 1990
Azotobacter chroococcum utilized catechol, protocatechuic acid and gentisic acid as sole carbon source. Rothera's test indicated the ortho cleavage of phenols. The cells displayed high levels of dioxygenase activity. Catechol was cleaved by the ortho pathway mediated by catechol 1,2-dioxygenase.
S, Balajee, A, Mahadevan
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Sensitivity of Azotobacter Chroococcum to some Antibiotics

Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie, 1973
Summary Low numbers of Azotobacter , and failure of the response of crops to inoculation with organism have been attributed to inhibition by many rhizosphere organisms, like actinomycetes and bacteria which produce toxic substances, including some known antibiotics (Krasil'nikov 1954). Inhibition of Azotobacter chroococcum by penicillin was noted
E, James, S T, Shende, A, Sen
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Biosynthesis of cytokinins by Azotobacter chroococcum

Soil Biology and Biochemistry, 1989
Abstract Cytokinins were detected in culture nitrates of Azotobacter chroococcum, A. beijerinckii, A. vinelandii, Pseudomonas fluorescens and P. putida . The most prolific producer of cytokinins was A. chroococcum . Several purine ring constituents [adenine (ADE), adenosine, adenosine-5′-monophosphate, hypoxanthine, inosine and inosine-5 ...
K.F. Nieto, W.T. Frankenberger
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The hydrogen cycle in nitrogen-fixing Azotobacter chroococcum

Biochimie, 1978
H2 will support nitrogenase activity (C2H2 reduction) in Azotobacter chroococcum with or without added carbon substrate. Results show that H2 is metabolised to transfer electrons to nitrogenase and to the respiratory chain to produce ATP. H2-supported nitrogenase activity is most significant at low carbon substrate concentrations, but also occurs at ...
C C, Walker, M G, Yates
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