An evaluation of the kinetics of microwave doneness indicators

Katherine A. Nelson, Theodore P. Labuza

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The kinetics of MicroRite™ microwave doneness indicator (DI) tags were evaluated at six constant temperatures for six tag widths using the relationship: width2 = k∗time. The rate constant results fit the Arrhenius, In k vs. 1/T, relationship very well (r2 = 0.85). The DI tags performed as predicted by the determined kinetic parameters under variable temperature conditions both external and internal to a microwave oven. Microwave foods with three package designs were cooked at 400 to 1000 W while monitoring internal and surface temperatures. The time/temperature profile of the food was used to determine the DI tag width that would indicate the cook time necessary to insure that a seven log cycle reduction in vegetative pathogen number had occurred.

Original languageEnglish (US)
Pages (from-to)203-207
Number of pages5
JournalJournal of food protection
Issue number3
StatePublished - Mar 1992

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