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Archives of Microbiology

, Volume 98, Issue 1, pp 127–131 | Cite as

Molar growth yield of Nitrobacter winogradskyi during exponential growth

  • H. Laudelout
  • R. Lambert
  • J. L. Fripiat
Article

Abstract

A numerical analysis of experimental growth curves obtained for Nitrobacter by observing changes in cell numbers, substrate concentration and rate of heat evolution has allowed the calculation of the growth rate constants during the phase of balanced growth. The molar growth yield was smaller during that phase than during the phase preceding it. On the other hand, the rate of heat evolution was larger during exponential growth by a factor of about 1.5 than during the stages up to and including this phase. The two observations being in agreement since, if less efficient synthesis occurs during exponential growth, more free energy must be dissipated as heat.

Key words

Nitrobacter Giowth Thermodynamic Molar Yield 

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References

  1. Dessers, A., Chiang, C., Laudelout, H.: Calorimetric determination of free energy efficiency in Nitrobacter winogradskyi. J. gen. Microbiol. 64, 71–76 (1970)Google Scholar
  2. Edwards, V. H., Wilke, C. R.: Mathematical representation of batch culture data. Biotechnol. Bioeng. X, 205–232 (1968)Google Scholar
  3. Tsien, H. C., Lambert, R., Laudelout, H.: Fine structure and the localization of the nitrite oxidizing system in Nitrobacter winogradskyi. Antonie v. Leeuwenhoek 34, 483–494 (1968)Google Scholar
  4. Tsien, H. C., Laudelout, H.: Changes in cytochrome content and turnover number during growth of Nitrobacter. Arch. Mikrobiol. 75, 266–268 (1971)Google Scholar

Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • H. Laudelout
    • 1
  • R. Lambert
    • 1
  • J. L. Fripiat
    • 1
  1. 1.Laboratoire de Physico-Chimie Biologique, Institut des Sciences de la TerreUniversité de LouvainHeverlee

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