Pasteurization and sterilization processes are applied heat treatment is usually in the form of processed products but different application purposes, as well as its impact on the product. Pasteurization is performed at temperatures below 100 degrees C. The main objective is to destroy pathogenic microorganisms to produce safe products. Besides, pasteurization also destroys a large part of spoilage microorganisms and as a result of the product shelf life is extended. Pasteurization does not completely destroy microorganisms, particularly bacteria spores. Therefore, the pasteurized food products are often stored in cold conditions. Sterilization is the process of heat treatment more powerful, destroying all living cells and microbial spores. For example, sterilization is used for the production of canned fish. Canned products have a long shelf life, can be more than 1 year, and does not need to be stored in cold conditions. However, because sterilization is heat treated at a high level should also cause nutrient loss and reduced quality more sense. Table 3. Percentage of vitamin C remains after concentrating at different temperatures
đang được dịch, vui lòng đợi..
