6-Control_of_Microorganisms_Feb7

Coli o157h7 flash pasteurization 72c for 15s bulk

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: reduce the microbial load in heat-sensitive liquids –  Does not kill all organisms, it is not a method of sterilization. •  Reduces the microbial load, increases the shelf life of the product. •  Pasteurization reduces significantly the population of many pathogens: •  •  •  •  •  •  Listeria monocytogenes Salmonella enterica Campylobacter E. coli O157:H7 Flash pasteurization: 72°C for 15s. Bulk pasteurization: 65°C, 30min. 1. Physical methods: radia4on •  Microwaves, UV, X-rays, gamma rays, and electrons can reduce microbial growth •  UV has sufficient energy to cause modifications and breaks in DNA, which inhibit replication, transcription and cause death. –  UV is useful for decontamination of surfaces –  Cannot penetrate solid, opaque, or light-absorbing surfaces Brock Biology of Microorganisms, 13th Edition. Radia4on Ionizing radiation –  Electromagnetic radiation that produces ions and other reactive molecules –  Generates electrons,...
View Full Document

This note was uploaded on 03/20/2014 for the course PSYC 101 taught by Professor Catone during the Spring '07 term at CSU Fullerton.

Ask a homework question - tutors are online