1989 Volume 36 Issue 7 Pages 551-556
hydrochloric acid or citric acid. Growth inhibitory pH value of adipic acid for Clostridium botulinum 62 A and 213 B was 5.5. The minimum growth inhibitory concentrations of adipic acid for theses trains at pH 5.0 and 5.5 were 0.08 and 0.5%, respectively. The concentration of undissociated adipic acid required to inhibit their growth completely was calculated as about 12-15mg/100ml. Adipic acid lowered thermal resistance of Clostridium spores in the solutions of pH 7.0. Thermal resistance of the spores of C. botulinum 62 A, 213 B and C. perfringens was decreased by about 50 and 90% by adding 0.2 and 0.5% adipic acid, respectively. Similarly that of the spores of C. sporogenes was decreased by about 90% by addition of 0.6% adipic acid.
