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 the process of controlling microbes (bacteria, yeast, and moulds) to modify food, producing a desired product. Often we talk about the negative issues caused by microorganisms in food such as food spoilage.1. Fermentation is the process of controlling microbes (bacteria, yeast, and moulds) to modify food, producing a desired product. Often we talk about the negative issues caused by microorganisms in food such as food spoilage. But they can be used as efficient live factories to produce health beneficial food.