Thermal resistance of Ailicyclobacillus acidoterrestris pores in different buffers and pH

摘要

The influence of buffers and pH on the thermal resistance of a novel flat sour-type of spoilage bacterium, Alicylobacillus acidoterrestris, was investigated. At a low concentration (20 mM), decimal reduction times (D-values) in citrate and phosphate buffers were 13.6 and 12.9 min. respectively, showing little variation. At high concentration (100 mM), however, the D-value in citrate buffer, 14.4 min, was significantly higher than that in the phosphate buffer, 12.3 min. D-values in Mcllvaline buffers did not vary widely within the pH range of 3.0 to 8.0. At 88, 90,92 and 95 deg.C in Mcllvaine buffers, D-values were 24.1-29.1, 14.8-16.8, 5.7-7.1 and 2.2-2.8 min, respectively.