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THERMORESISTANCE OF THE PSYCHROTROPHIC BACTERIA OF RAW MILK AND THEIR PROTEINASES.

THERMORESISTANCE DES BACTERIES PSYCHROTROPHES DU LAIT CRU ET DE LEURS PROTEINASES.

Author(s) : MOTTAR J.

Type of article: Article

Summary

TWO STRAINS OF GRAM-NEGATIVE PSYCHROTROPHIC BACTERIA, PSEUDOMONAS P 104 AND FLAVOBACTERIUM P 108, CAPABLE OF PRODUCING EXTREMELY THERMOSTABLE EXOCELLULAR PROTEINASES, WERE ISOLATED FROM COOLED MIXED MILK. BACTERIA THEMSELVES, VERY SENSITIVE TO HEAT, ARE KILLED BY 30 SEC TREATMENT AT 333 K (60 DEG C), 5 SEC AT 338 K (65 DEG C) OR 1 SEC AT 343 K (70 DEG C). THE THERMORESISTANCE OF PROTEINASES IS SUFFICIENTLY HIGH FOR COMPLETE SURVIVAL TO A UHT TREATMENT.

Details

  • Original title: THERMORESISTANCE DES BACTERIES PSYCHROTROPHES DU LAIT CRU ET DE LEURS PROTEINASES.
  • Record ID : 1985-1150
  • Languages: French
  • Source: Hygiène de la Viande et du Lait - vol. 64 - n. 640-642
  • Publication date: 1984/06
  • Document available for consultation in the library of the IIR headquarters only.

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