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.
1. In cellular respiration, aerobic respiration yields 38 ATP while fermentation yields only 2. 2. In food processing, fermentation is usually an anaerobic type of respiration that converts sugars into alcohol without the involvement of oxygen. 3. Aerobic respiration is a biologic process that involves oxygen.