Coitus interruptus, also known as the withdrawal. method, is the oldest form of male contraceptive. method to be practiced.[1] It involves the male partner. pulling out the penis before ejaculation.[1] Even though. it is the oldest method of male contraception to be. practiced, research has given it very little attention.
Updated September 18, 2016. Fermentation is an energy-yielding anaerobic metabolic process in which organisms convert nutrients (typically carbohydrates) to alcohols and acids (lactic acid and acetic acid). Fermentation is perhaps the most ancient biotechnological discovery.
Fermentation is a chemical process in which microorganisms including bacteria, yeast and mould, convert carbohydrate like sugar into an acid or alcohol. Fermentation is a chemical process in which microorganisms including bacteria, yeast and mould, convert carbohydrate like sugar into an acid or alcohol. Fermentation occurs naturally in different foods including a variety of grains, fruits, juices, and other organic liquids.