S. cerevisiae strains were screened
for their ability to grow and ferment glucose in a temperature range of 35–45 ◦C. All the strains grew (inagar plates) at 35 and 40 ◦C, only two strains grew at 42 ◦C, and no strain grew at 45 ◦C. The yeasts were placed in a liquid medium, and incubated at 35, 40 and 42 ◦C. Glucose-to-ethanol conversion yield was