Rhythmic changes in dry heat resistance of Bacillus subtilis spores after rapid changes in pH.
Heat resistance of freeze-dried Bacillus subtilis spores varied in a rhythmic manner as a function of time between acidification to about pH 1.5 and freezing. A comparable rapid shift to pH 11 produced little change in resistance to heat.
D001412:Bacillus subtilis / Q000254:growth & development; D005612:Freeze Drying; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D010507:Periodicity; D013171:Spores, Bacterial / Q000254:growth & development