Table 3 Inactivation of protease from microorganisms by heat treatment (Christophersen, 1980)

Source of protease Heat treatment Residual activity
Pseudomonas fluorescens 60℃/ 30min 0
Pseudomonas aeruginosa 63℃/ 30min 94%
72℃/ 15sec 64%
100℃/ 2min 0
Pseudomonas P 26 62.8℃/ 15h 0
71.4℃/ 8h 0
121℃/ 9min 0
149℃/ 90sec 10%
Pseudomonas MC 60 55℃/ 60min 3%
70℃/ 60min 33%
75℃/ 60min 26%
149℃/ 30sec 0
Pseudomonas Nr.12 50℃/ 20min 0
60℃/ 20min 42%
70℃/ 20min 65%
100℃/ 20min 32%
Pseudomonas fluorescens 150℃/ 1min +
142℃/ 2sec 1%
Streptococcus lactic 98℃/ 60min 28%
Bacillus subtilis 60℃/ 15min 40%
Bacillus thermoproteolyticus 85℃/ 15min 40%