BIOL 2303 Lecture Notes - Lecture 19: Ultra-High-Temperature Processing, Nitrocellulose, Desiccation
8 Jul 2020
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Document Summary
Heat is frequently used to eliminate microorganisms. Moist heat (moisture coming out of boiling water) kills microbes. Thermal death point (tdp) is the length of time required to kill. Decimal reduction time (drt ) is the length of time in which all bacteria in a liquid culture at a given temperature. 90% of a bacterial population will be killed at a given temperature. minutes most effective method of moist heat sterilization. Boiling (100c) kills many vegetative cells and viruses within 10. Autoclaving (121c for 15 mins) (steam under pressure) is the. In pasteurization , a high temp is used for a short time (72 c for. 15 sec) to destroy pathogens without altering the flavour of the food. Ultra high temp (uht) treatment (140 c for 3 sec) is used to sterilize dairy products. Methods of dry heat sterilization include direct flaming,
