Freezing process is one method used in food preservation. In order to reduce the temperature of the food below the Freezing point and make some water to change the status of crystalline ice. The aftermath is the solute in water the clotting concentration is more and more reduced aw of food down Even though freezing could reduce microbial contamination. But keeping frozen foods at lower than - 10oC can inhibit the growth of bacteria, at a temperature just below the - 12oC. To inhibit the yeast, while low temperature - 18oC inhibited fungal (Kennedy 2000), food through the frozen and stored in frozen have nutritional and organoleptic properties change little. The food frozen solid popular including frozen fruits, seafood, meats, baked, and cooked, etc. However, this type of food production cost is relatively high. Because of the need to keep at the low temperature all the time.
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