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: Fermentation is the production of biochemical energy (in the form of ATP) through a process called substrate-level phosphorylation. This process only partially oxidizes glucose, producing mainly ethanol and carbon dioxide as by-products.ermentation: Fermentation is the production of biochemical energy (in the form of ATP) through a process called substrate-level phosphorylation. This process only partially oxidizes glucose, producing mainly ethanol and carbon dioxide as by-products.