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 process by which sugars are converted to acids or alcohols (or a number of other metabolites) using a process other than aerobic respiration. A real world example of fermentation in the human body is lactic acid buildup during exercise.Useful books on Amazon.he energy that is subsequently used to produce ATP originates from the oxidation of compounds such as carbohydrates (often, sugars). Fermentation is an important metabolic process that plays a huge role in anaerobic conditions.