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This Demonstration generates an idealized temperature profile in thermal preservation of foods or pharmaceuticals in order to reach a given survival ratio of a targeted microorganism or spore. The process can be conventional or pressure-assisted. The program calculates the time to start cooling in the former and also the holding time under pressure in the latter. It is based on the assumptions that the mortality pattern follows Weibullian kinetics, of which log-linear inactivation is a special case, and that the lethal effect during pressurization is primarily thermal.
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