Lowry P D, Fernando T, Gill C O
Appl Environ Microbiol. 1979 Aug;38(2):335-6. doi: 10.1128/aem.38.2.335-336.1979.
Normal batch dry rendering practice does not ensure sterile products, because bacterial spores are protected against thermal denaturation by the high fat-low water content environment which results from drying the materials at temperatures below those required for sterilization.
常规批量干法炼制操作无法确保产品无菌，因为在低于灭菌所需温度下干燥物料会形成高脂肪 - 低水分含量的环境，细菌孢子在这种环境中受到保护而不会发生热变性。
