Inactivation Kinetics of Listeria innocua ATCC 33090 at Various Temperature Heating-up and Pressure Building-up Rates

다국어 초록 (Multilingual Abstract)

The effects of temperature heating-up rate and pressure building~up phase on the inactivation of Listeria innocua
ATCC 33090 were evaluated in buffered peptone water. The number of 1. znnocua was reduced by 5.57 and 6.52 log CFUI
mL during the nonisothermal treatment (the come-up time followed by isothermal process) and i?e Isothermal treatme~t,
res ectivel at 60°C. When compared to the isothermal treatment (0.76<D value<0.9?), 1. znn~cua. exposed at t e no~sothe~al treatment (1.58<D value<2.31) became more resistant to heat. The come-up tune r~ductIons m numbers of 1.
innocua significantly increased with increasing the heating rates (p<0.05). The pronounced ~eductI?n was observed by more
than 5 log CFU/mL at 33.2°C/min of temperature heat!ng-~ate. T.he effect of the combmed high pressure and thermal
processing on the inactivation of 1. innocua increased WIth mcreas~g pressure and temperature. ~t all temperature levels
from 40 to 60°C under 700 MPa,1. innocua was not detected by ennchment culture (>7 log reduction).

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