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Water-in-oil macroemulsions sustain long-term viability of microbial cells in organic solvents.

Authors
  • Stefan, Alessandra
  • Palazzo, Gerardo
  • Ceglie, Andrea
  • Panzavolta, Eleonora
  • Hochkoeppler, Alejandro
Type
Published Article
Journal
Biotechnology and bioengineering
Publication Date
Feb 05, 2003
Volume
81
Issue
3
Pages
323–328
Identifiers
PMID: 12474255
Source
Medline
License
Unknown

Abstract

Extremely stable water-in-oil macroemulsions have been obtained by dispersing water in isooctane in the presence of lecithin. Either prokaryotic (Escherichia coli) and eukaryotic (Saccharomyces cerevisiae and Rhodotorula minuta) cells hosted in these water-in-oil macroemulsions are viable for weeks despite the consistent excess of organic solvent (ranging from 70 to 84%, v/v) in these ternary systems. Conjugation occurs upon mixing macroemulsions containing F(+) or F(-) Escherichia coli strains, indicating consistent mass transfer between the water droplets. Populations of yeasts hosted in water-in-oil macroemulsion feature a higher frequency of cells aggregation when compared with the corresponding populations suspended in homogeneous aqueous media.

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