Explain about the Asepsis - Methods of Food Processing?

Food is a living system and it has natural protection mechanisms in its raw agricultural state. Just removed once from the field or protective skin or peel (e.g. banana, coconut, vegetables, shell of nuts, husks of grains etc), it begins to deteriorate. Asepsis deals with the prevention of microbial contamination (keeping out microorganisms) of fresh or processed foods. Packaging of foods is a widely used application of asepsis.