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Abnormal heat resistance of bacterial spores heated by direct injection into steam


, : Abnormal heat resistance of bacterial spores heated by direct injection into steam. Lait 53(521/522): 23-39

Spores of Clostridium tyrobutyricum, Bacillus cereus and B. stearothermophilus were heated in a pilot-plant UHT sterilizer of the milk-into-steam type. Temp. between 102 and 115 deg C were chosen, and the mean holding time was about 10 s. Working fluids were buffer, whole milk or skim-milk. Distribution function for residence times was determined by means of methylene blue as a tracer.

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