Biotechnology Letters

, Volume 19, Issue 6, pp 499–501 | Cite as

Ethanol stimulates the flocculation of Zymomonas mobilis

  • M.A.P.F. Palha
  • C.E. Lopes
  • N. PereiraJr.
Article

Abstract

When flocculating cells of Zymomonas mobilis were put in contact with increasing concentrations of ethanol, flocculation was intensified. The settling velocity increased 5.3-fold when the ethanol concentration rose from 0 to 12% v/v. Additionally, the percentage of free-cells diminished considerably (from 33 to 10%), denoting an increase on the extent of flocculation. The stress provoked by ethanol possibly leads to the activation of genes responsible for aggregation.

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • M.A.P.F. Palha
    • 1
  • C.E. Lopes
    • 2
  • N. PereiraJr.
    • 3
  1. 1.Departamento de Engenharia QuímicaUniversidade Federal de Pernambuco, Cidade UniversitariaRecife PEBrazil
  2. 2.Departamento de AntibióticosUniversidade Federal de PernambucoPernambucoBrazil
  3. 3.Departamento de Engenharia BioquímicaUniversidade Federal do Rio de JaneiroJaneiroBrazil

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