title: Effect of ultrasonic waves on the heat resistance of Bacillus cereus and Bacillus licheniformis spores.
abstract: Heat resistance of Bacillus cereus and Bacillus licheniformis spores in quarter-strength Ringer solution decreases markedly after ultrasonic treatments which are unable to kill a significant proportion of the spore population. This effect does not seem to be caused by a loss of Ca(2+) or dipicolinic acid. The use of ultrasonics to eliminate vegetative cells or to break aggregates in Bacillus spore suspensions to be used subsequently in heat resistance experiments appears to be unadvisable.
mesh_terms: D001407:Bacillus / Q000378:metabolism; D001409:Bacillus cereus / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D002470:Cell Survival; D006358:Hot Temperature; D010848:Picolinic Acids / Q000378:metabolism; D013170:Spores; D013171:Spores, Bacterial / Q000378:metabolism; D014465:Ultrasonics
chemical_list: D010848:Picolinic Acids; D002118:Calcium