4. Conclusions
Argentine molasses and grapes were used to isolate 29 ethanolproducing yeasts, finding three isolates with higher ability to produce ethanol. One of these isolates showed a homogeneous growth (A2) meanwhile the other two presented a flocculent growth (A10 and A11) when they were grown in commercial media. It was also observed that the three isolates presented a percentage of similarity of 100% with the strain S. cerevisiae. The three strains were highly sensitive to changes in temperature, finding an optimal temperature for the production of ethanol at 30 C, and although they could tolerate up to 300 g/L without decreasing the production of ethanol, the best results were achieved using 250 g/L of initial sugar.