Calculating Salmonella inactivation in nonisothermal heat treatments from isothermal nonlinear survival curves.

摘要: Salmonella cells in two sugar-rich media were heat treated at various constant temperatures the range of 55 to 80°C and their survival ratios determined time intervals. The resulting nonlinear semilogarithmic curves are described by model log10S(t) = −b(T)tn(T), where S(t) is momentary ratio N(t)/N0, b(T) n(T) coefficients whose temperature dependence empirical mathematical models. When profile, T(t), a nonisothermal treatment can also be expressed algebraically, transformed into function time, i.e., b[T(t)] n[T(t)]. If inactivation rate primarily depends on ratio, then curve under conditions constructed solving differential equation, previously suggested Peleg Penchina, expressions that contain corresponding n[T(t)] terms. applicability t...