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.
A scientist draws a sample from a fermentation unit used in the development of the first. Merck Sharp & Dohme. A chemical change in animal and vegetable matter brought about by microscopic yeasts, bacteria, and molds is called fermentation.Examples of fermentation are the souring of milk, the rising of bread dough, and the conversion of sugars and starches to alcohol.Many industrial chemicals and a number of antibiotics used in modern medicine are produced by fermentation. fermentation...xamples of fermentation are the souring of milk, the rising of bread dough, and the conversion of sugars and starches to alcohol. Many industrial chemicals and a number of antibiotics used in modern medicine are produced by fermentation. fermentation...