Predictive Microbiology for Monitoring Spoilage of Dairy Products with Time-Temperature Integrators |
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| Authors: | BIN FU PETROS S. TAOUKIS THEODORE P. LABUZA |
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| Affiliation: | Authors Fu and Labuzza are with the Dept. of Food Science and Nutrition, Univ. of Minnesota, 1334 Eckles Ave., St. Paul, MN 55108.;Author Taoukis, formerly with the Univ. of Minnesota, now is in the Greek Army and affiliated with the University of Athens, Greece. |
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| Abstract: | Time/temperature integrators (TTI) have a potential for monitoring time-temperature history of perishable foods, including dairy products. To correlate the end of shelf life of dairy products with different TTI's, kinetic data for growth of a dairy spoilage microorganism was obtained. Both Arrhenius and square root equations were used to model the growth of Pseudomonas fragi. A significant negative history effect was observed for P. fragi growth rate whereas history effect was positive on the lag phase, under certain nonisothermal conditions. A correlation scheme of P. fragi growth was developed with the TTI response. The application of TTI's for dairy products is feasible despite the history effects. |
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