الفهرس 
Introductionيوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
food preservation, any of a number of methods by which food is kept from spoliage after harvest or slaughter. such practices date to prehistoric times., and fermentation. modern methods includ canning, pasteurization, freezing , irradiation, and the addition of chemicals. advances in packing materials have played an important role in modern food preservation.