高压脉冲电场对蛋清单增李斯特菌的杀灭效
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Effect of Pulsed Electric Fields on the Inactivation of Listeria innocua in Egg White
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    摘要:

    研究了高压脉冲电场(PEF)与温和热协同处理对蛋清中嗜冷菌——单增李斯特菌的杀灭效果。结果表明,当处理温度为15℃时,20、25、30和35kV/cm电场强度作用400μs,每1mL蛋清所含李斯特菌数分别降低了0.8、1.4、2.3和3.8个数量级。当处理温度升至55℃时,每1mL蛋清总菌数分别降低了1.3、2.5、4.9和6.4个数量级。当处理温度为15℃,35kV/cm作用100、200、300和400μs时,每1mL蛋清总菌数分别下降了1.8、2.7、3.5和3.8个数量级,当处理温度升至55℃时,每1mL蛋清总菌数分别降低了2.7、3.8、5.4和6.4个数量级,表明温和热处理与PEF具有协同杀菌作用。PEF施加能量与杀菌效果呈一定的正相关性,PEF施加能量越大,杀菌效果越好。

    Abstract:

    The synergistic lethal effect of pulsed electric fields (PEF) combined with mild heat on Listeria innocua in egg white was evaluated. The results show that 0.8, 1.4, 2.3 and 3.8 log reductions of Listeria innocua inoculated in egg white were achieved by 20, 25, 30 and 35kV/cm for 400μs at 15℃, respectively. The reductions increased to 1.3, 2.5, 4.9 and 6.4 logs when the temperature was 55℃. Approximately 1.8, 2.7, 3.5 and 3.8 log reductions of Listeria innocua were induced by 35kV/cm for 100, 200, 300 and 400μs at 15℃ respectively. The reductions increased to 2.7, 3.8, 5.4 and 6.4 logs when the temperature was 55℃. The results demonstrate the synergistic effect of PEF and mild heat on the inactivation of Listeria innocua in egg white. There is a linear relationship between inactivation of Listeria innocua and PEF applied energy.

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赵伟,杨瑞金,崔倩.高压脉冲电场对蛋清单增李斯特菌的杀灭效[J].农业机械学报,2009,40(5):100-104. Effect of Pulsed Electric Fields on the Inactivation of Listeria innocua in Egg White[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(5):100-104.

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