Abstract
The maximum principle theory (Pontryagin et al., 1962) was used to optimize thiamin retention during sterilization of a conduction-heating canned food. The optimal retort temperature Profile determined by this procedure improved thiamin retention by more than 2%, as Compared with other methods, and showed that a single solution for the temperature profile exists. This optimization method may be applicable to other processes in which retention of nutrients or other characteristics is to be improved.