Artículos de revistas
Microbial Modeling Of Thermal Resistance Of Alicyclobacillus Acidoterrestris Cra7152 Spores In Concentrated Orange Juice With Nisin Addition [modelagem Microbiana Da Resistência Térmica De Esporos De Alicyclobacillus Acidoterrestris Cra7152 Em Suco De Laranja Concentrado Com Adição De Nisina]
Registro en:
Brazilian Journal Of Microbiology. , v. 40, n. 3, p. 601 - 611, 2009.
15178382
2-s2.0-70349487488
Autor
Pena W.E.L.
de Massaguer P.R.
Teixeira L.Q.
Institución
Resumen
The nisin effect on thermal death of Alicyclobacillus acidoterrestris CRA 7152 spores in concentrated orange juice (64°Brix) was studied. Concentrations of 0, 50, 75 and 100 IU of nisin/ml juice, at temperatures of 92, 95, 98 and 102°C were evaluated. The quadratic polynomial model was used to analyze the effects of the factors and their interaction. Verification of surviving spores was carried out through plating in K medium (pH 3.7). The results showed that the D values without nisin addition were 25.5, 12.9, 6.1 and 2.3 min for 92, 95, 98 and 102°C respectively. With addition of nisin into the juice there was a drop of heat resistance as the concentration was increased at a same temperature. With 30, 50, 75, 100 and 150 IU/ml at 95°C, the D values were 12.34, 11.38, 10.49, 9.49 and 9.42 min respectively, showing that a decrease in the D value up to 27% can be obtained. 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