Definition of tae kwon do for English Language Learners. : a style of fighting that originated in Korea and that uses kicks and punches but no weapons. Britannica.com: Encyclopedia article about tae kwon do.
It is also used in the baking process as a leavening agent; yeast releasing gas into their environment results in the spongy-like texture of breads and cakes. Because of its role in fermentation, humans have known about and used Saccharomyces cerevisiae for a long time.
If the temperature is too cool, the fermentation will be sluggish, resulting in an opportunity for the growth of contaminants, such as wild yeast and bacteria. In terms of fermentation, lager yeasts are routinely fermented between 40â54 Â°F (4â12 ÂºC) while ale yeast is used from 55â70 Â°F (13â21 ÂºC). The optimal fermenting temperatures of yeast vary considerably. Some ale yeasts for example, do not perform well below 65 Â°F (18 ÂºC).