单核细胞增生李斯特菌热休克细胞对压力超声处理和压力热超声处理的抗性。
Resistance of heat-shocked cells of Listeria monocytogenes to mano-sonication and mano-thermo-sonication.
作者信息
Pagán R, Mañas P, Palop A, Sala F J
机构信息
Tecnología de los Alimentos, Facultad de Veterinaria, Universidad de Zaragoza, Spain.
出版信息
Lett Appl Microbiol. 1999 Jan;28(1):71-5. doi: 10.1046/j.1365-2672.1999.00465.x.
Heat shocks did not increase the resistance of Listeria monocytogenes to an ultrasonication treatment under pressure (Mano-Sonication; MS). While heat-shocked cells (180 min, 45 degrees C) became sixfold more heat resistant than native cells (D62 = 1.8 min vs D62 = 0.24 min), the resistance of native and heat-shocked cells to MS (200 kPa, 117 microns) was the same (DMS = 1.6 min). The inactivation rate of non-heat-shocked cells of L monocytogenes by a combined heat/ultrasonication treatment under pressure (Mano-Thermo-Sonication; MTS) was an additive effect. On the contrary, on heat-shocked cells, the inactivation rate of MTS was greater than that of heat added to the inactivation rate of MS (synergistic effect) in the range 62-68 degrees C.
热休克并未增加单核细胞增生李斯特菌对压力下超声处理（压力辅助超声处理；MS）的抗性。虽然热休克细胞（180分钟，45摄氏度）的耐热性比天然细胞提高了六倍（D62 = 1.8分钟对D62 = 0.24分钟），但天然细胞和热休克细胞对MS（200千帕，117微米）的抗性相同（DMS = 1.6分钟）。压力下热/超声联合处理（压力辅助热超声处理；MTS）对非热休克单核细胞增生李斯特菌的失活率具有累加效应。相反，在62 - 68摄氏度范围内，对于热休克细胞，MTS的失活率大于热与MS失活率之和（协同效应）。
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