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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Univ Sao Paulo, Dept Chem Engn, Escola Politecn, BR-05424970 Sao Paulo, BrazilUniv Sao Paulo, Dept Chem Engn, Escola Politecn, BR-05424970 Sao Paulo, Brazil
Aguiar, Helena de Fazio
Yamashita, Andre Shigueo
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Univ Sao Paulo, Dept Chem Engn, Escola Politecn, BR-05424970 Sao Paulo, BrazilUniv Sao Paulo, Dept Chem Engn, Escola Politecn, BR-05424970 Sao Paulo, Brazil
Yamashita, Andre Shigueo
Wilhelms Gut, Jorge Andrey
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Univ Sao Paulo, Dept Chem Engn, Escola Politecn, BR-05424970 Sao Paulo, BrazilUniv Sao Paulo, Dept Chem Engn, Escola Politecn, BR-05424970 Sao Paulo, Brazil
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Hokkaido Univ, Grad Sch Agr Sci, Kita Ku, Kita 9,Nishi 9, Sapporo, Hokkaido 0608589, JapanHokkaido Univ, Grad Sch Agr Sci, Kita Ku, Kita 9,Nishi 9, Sapporo, Hokkaido 0608589, Japan
Lee, Jung-Hyun
Kawamura, Shuso
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Hokkaido Univ, Grad Sch Agr Sci, Kita Ku, Kita 9,Nishi 9, Sapporo, Hokkaido 0608589, JapanHokkaido Univ, Grad Sch Agr Sci, Kita Ku, Kita 9,Nishi 9, Sapporo, Hokkaido 0608589, Japan