1.
Nouv Presse Med
; 4(22): 1660, 1975 May 31.
Article
in French
| MEDLINE
| ID: mdl-1215186
2.
Appl Microbiol
; 29(4): 565-6, 1975 Apr.
Article
in English
| MEDLINE
| ID: mdl-235883
ABSTRACT
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.