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  • Aerobic nitrate reduction  (1)
  • Atomic and molecular processes in external fields, including interactions with strong fields and short pulses  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Aerobic nitrate and nitrite reduction in continuous cultures of Escherichia coli E4 (1990)
    Springer
    Archives of microbiology 153 (1990), S. 531-536 
    Details
    ISSN: 1432-072X
    Keywords: Aerobic nitrate reduction ; Aerobic nitrite reduction ; Growth of E. coli on nitrate ; Nitrate reductase ; Nitrite reductase ; Chemostate culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Nitrate and nitrite was reduced by Escherichia coli E4 in a l-lactate (5 mM) limited culture in a chemostat operated at dissolved oxygen concentrations corresponding to 90–100% air saturation. Nitrate reductase and nitrite reductase activity was regulated by the growth rate, and oxygen and nitrate concentrations. At a low growth rate (0.11 h−1) nitrate and nitrite reductase activities of 200 nmol · mg−1 protein · min−1 and 250 nmol · mg−1 protein · min−1 were measured, respectively. At a high growth rate (0.55 h−1) both enzyme activities were considerably lower (25 and 12 nmol mg−1 · protein · min−1). The steady state nitrite concentration in the chemostat was controlled by the combined action of the nitrate and nitrite reductase. Both nitrate and nitrite reductase activity were inversely proportional to the growth rate. The nitrite reductase activity decreased faster with growth rate than the nitrate reductase. The chemostat biomass concentration of E. coli E4, with ammonium either solely or combined with nitrate as a source of nitrogen, remained constant throughout all growth rates and was not affected by nitrite concentrations. Contrary to batch, E. coli E4 was able to grow in continuous cultures on nitrate as the sole source of nitrogen. When cultivated with nitrate as the sole source of nitrogen the chemostat biomass concentration is related to the activity of nitrate and nitrite reductase and hence, inversely proportional to growth rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00245261
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    Paper (German National Licenses)
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  • 2
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    Redistribution of vibrational population in a molecular ion with nonresonant strong-field laser pulses (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-03-01
    Description: Author(s): W. A. Bryan, C. R. Calvert, R. B. King, G. R. A. J. Nemeth, J. D. Alexander, J. B. Greenwood, C. A. Froud, I. C. E. Turcu, E. Springate, W. R. Newell, and I. D. Williams We present an experimental demonstration of nonresonant manipulation of vibrational states in a molecule by an intense ultrashort laser pulse. A vibrational wave packet is generated in D_{2} ^{+} through tunnel ionization of D_{2} by a few-cycle pump pulse. A similar control pulse is applied as the ... [Phys. Rev. A 83, 021406] Published Mon Feb 28, 2011
    Keywords: Atomic and molecular processes in external fields, including interactions with strong fields and short pulses
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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