Pasteur's finding showed that there are two types of fermentation: alcoholic and lactic acid. Alcoholic fermentation occurs by the action of yeast; lactic acid fermentation, by the action of bacteria.
But in a very general way, fermentation is microorganisms, like different types of bacteria or yeast, breaking down starches or sugar, turning them into acids or alcohols, and producing carbon ...
Optical density values were maintained around 80 and viability at 88% at 72 hours elapsed fermentation time. Culture broth pH was well maintained at 5.0. We cultured yeast in an aerobic ...