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.
Hyrolyzed Yeast Extract (Peptone) & Autolyzed Yeast. Yeast extract is a complex and widely used hydrolysate of yeasts. It provides nitrogenous compounds, carbon, sulfur, trace nutrients, vitamin B complex and other important growth factors, which are essential for the growth of diverse microorganisms. There are two different types of yeast extracts - the hyrolyzed yeast extract, also called yeast peptone, and the autolyzed yeast. The hyrolyzed yeast extract is produced by digestion of exogeneous enzymes or acid to hydrolyze the proteins.