LETHBRIDGE, Canada, Sep 22 (IPS) – Food processing extends shelf-life and can transforms raw food into attractive, marketable products. It can also prevent contamination. The transformation can involve numerous physical and chemical processes such as mincing, cooking, canning, liquefaction, pickling, macerating, emulsification, irradiation and lyophilization. Frozen processed and raw food changes transport and storage requirements radically; while the packaging of food, both raw and processed, is an industry unto itself.