Evaluation of a static treatment chamber to investigate kinetics of microbial inactivation by pulsed electric fields at different temperatures at quasi-isothermal conditions

Fundamental and Applied Aspects of Pulsed Electric Fields for Microbial Inactivation

“…Therefore to a precise characterization of PEF treatments both specific energy and electric field strength should be reported. Microbial inactivation by PEF is usually enhanced when the temperature of the treatment medium is increased, even in ranges of temperatures that are not lethal for microorganisms [10]. This effect has been attributed to changes in the phospholipid bilayer structure of the cell membranes, from a gel-like consistency to a liquid crystalline state that is caused by the temperature increase.…”

Aplicación industrial de los pulsos eléctricos de alto voltaje para la pasteurización de alimentos: revisión de su viabilidad técnica y comercial

“…Paralelamente al progreso tecnolo´gico, en los u´ltimos an˜os se ha puesto de manifiesto el importante efecto sine´rgico de los PEAV y la temperatura, incluso a temperaturas no letales (Heinz, Toepfl, & Knorr, 2003;Saldan˜a et al, 2010Saldan˜a et al, , 2011Sepu´lveda, Go´ngora-Nieto, San-Martı´n, & BarbosaCa´novas, 2005;. Segu´n los datos publicados hasta la fecha, el uso combinado de temperaturas y tratamientos de PEAV moderados (50-708C; 20-25 kV/ cm, 5150 kJ/kg) podrı´a ser suficiente para garantizar la pasteurizacio´n de alimentos lı´quidos (Saldan˜a et al, 2011).…”

Inactivation kinetics of Salmonella spp. under thermal and emerging treatments: A review

“…This non-uniformity must be considered during mathematical modeling (Álvarez, Condón, & Raso, 2006) which can be estimated using finite element models or other numerical simulations and should be reported together with the inactivation kinetics (Fox, 2007;Rauh, 2009;Roodenburg et al, 2010;Saldaña et al, 2010). …”

“…However, a scrutiny of the available survival data on Salmonella spp. exposed to emerging thermal and nonthermal treatments demonstrates that departure from non-linearity is highly prevalent as many references show (Álvarez, Mañas, Virto, & Condón, 2006;Erkmen, 2009;Liao, Kong, Zhang, Liao, & Hu, 2010;Monfort, Gayán, Raso, Condón, & Álvarez, 2010;Monfort, Gayán, Saldaña, et al, 2010;Niemira & Sites, 2008;Saldaña et al, 2010;Sampedro, Rodrigo, & Martínez, 2011;Wong, Linton, & Gerrard, 1998). Besides survival curves with upward or downward concavities, extreme tailing and sigmoidal behaviors have been often observed.…”