Building of Pressure-Assisted Ultra-High Temperature System and Its Inactivation of Bacterial Spores.

ABSTRACT: The pressure-assisted ultra-high temperature (PAUHT) system was built by using soybean oil as pressure-transmitting medium, and the multiple regression equation of soybean oil temperature change (ΔT_P ) during pressurization as a function of initial temperature (T_i ) and set pressure (P) was developed: ΔT_P = -13.45 + 0.46 T_i + 0.0799 P - 0.0037 T i 2 - 2.83 × 10^-5 P². The fitted model indicated that the temperature of the system would achieve ≥121°C at 600 MPa when the initial temperature of soybean oil was ≥84°C. The PAUHT system could effectively inactivate spores of Bacillus subtilis 168 and Clostridium sporogenes PA3679 (less than 1 min). Treatment of 600 MPa and 121°C w

SUBMITTER: Liang D 

PROVIDER: S-EPMC6579918 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature