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.
In fermentation the reduced NADH produced in glycolysis is converted back to oxidized NAD + . There are two types of fermentation. Both types of fermentation regenerate oxidized NAD + , which is necessary for glycolysis and consequently the continued production of ATP by that pathway.The net energy gain in fermentation is 2 ATP molecules/glucose molecule.n fermentation the reduced NADH produced in glycolysis is converted back to oxidized NAD + . There are two types of fermentation. Both types of fermentation regenerate oxidized NAD + , which is necessary for glycolysis and consequently the continued production of ATP by that pathway.