Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: ethanol tolerance

Sortuj według:

Ogranicz wyniki do:

Selection and adaptation of Saccharomyces cerevisiae to increased ethanol tolerance and production

100%

Fiedurek J., Skowronek M., Gromada A.

Polish Journal of Microbiology

2011

tom 60

nr 1

A total of 24 yeast strains were tested for their capacity to produce ethanol, and of these, 8 were characterized by the best ethanol yields (73.1181.78%). The most active mutant Saccharomyces cerevisiae ER-A, resistant to ethanol stress, was characterized by high resistance to acidic (pH 1.0 and 2.0), oxidative (1 and 2% of H₂O₂), and high temperature (45 and 52°C) stresses. During cultivation under all stress conditions, the mutants showed a considerably increased viability ranging widely from about 1.04 to 3.94-fold in comparison with the parent strain S. cerevisiae ER. At an initial sucrose concentration of 150 g/l in basal medium A containing yeast extract and mineral salts, at 30°C and within 72 h, the most active strain, S. cerevisiae ER-A, reached an ethanol concentration of 80 g/l, ethanol productivity of 1.1 g/l/h, and an ethanol yield (% of theoretical) of 99.13. Those values were significantly higher in comparison with parent strain (ethanol concentration 71 g/l and productivity of 0,99 g/l/h). The present study seems to confirm the high effectiveness of selection of ethanol-resistant yeast strains by adaptation to high ethanol concentrations, for increased ethanol production.

Ograniczanie wyników

1 Polish Journal of Microbiology

1 Fiedurek J.

1 Gromada A.

1 Skowronek M.

1 2011

Wyniki wyszukiwania

Selection and adaptation of Saccharomyces cerevisiae to increased ethanol tolerance and production