Predicting Thermophilic Spore Population Dynamics for UHT Sterilization Processes

Autor:	G.H. Smerage, V. Sapru, A.A. Teixeira, J.A. Lindsay
Rok vydání:	1992
Předmět:	Arrhenius equation education.field_of_study Thermophile fungi Population Thermodynamics Biology Sterilization (microbiology) Isothermal process Microbiology Spore symbols.namesake Reaction rate constant symbols education Food Science
Zdroj:	Journal of Food Science. 57:1248-1257
ISSN:	1750-3841 0022-1147
Popis:	A mathematical model of Bacillus stearothermophilus spore populations during lethal heating treats activation of dormant spores and inactivation mechanisms affecting dormant/activated spores. Rate constants of activation/inactivation processes were determined from isothermal survivor curves of experiments in 105, 110, 115, and 120°C and corresponding simulations with the model. Variations of rate constants with temperature were incorporated by Arrhenius equations responding to general temperature regimes. Tests demonstrated high correspondence between experimental survivor curves and those generated by simulations with the model for isothermal and dynamic, lethal heating. Tests also indicated Arrhenius rate constants at low lethal temperatures (105-120°C) and the model may apply to ultra high temperature. The new model was more effective than the traditional model in representing and predicting spore population dynamics during lethal heating.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8f2be560e889e9ab1dfb4651d5c7902a https://doi.org/10.1111/j.1365-2621.1992.tb11310.x Zobrazit plný text záznamu Plný text