Researchers used a fungus to make cellulase from corn stalks, then added yeast to turn the cellulase into ethanol. They found that the best conditions for this process were a certain ratio of cellulase to corn stalks, a specific temperature, and pH level. After 48 hours, they got 32.50% of the corn stalks turned into sugar. When yeast was added, they produced 9.3% more ethanol compared to just adding yeast without the cellulase step.