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 Green biotechnology is biotechnology applied to agricultural processes. 2  An example would be the selection and domestication of plants via micropropagation. 3  Another example is the designing of transgenic plants to grow under specific environments in the presence (or absence) of chemicals. Some examples are the designing of organisms to produce antibiotics, and the engineering of genetic cures through genetic manipulation. 2  White biotechnology, also known as industrial biotechnology, is biotechnology applied to industrial processes.