thermal resistance Flashcards
1
Q
water
A
Heat resistance of microorganism increases
with decrease in moisture or humidity.
2
Q
FAT
A
General increase in the heat resolution
3
Q
SALT
A
alt decrease water activity, and increase heat
resistance, or
4
Q
CHO
A
Presence of sugars cause increase in Heat
Resistance. Probably due to decrease in aw
5
Q
PH
A
Maximum heat resistance at optimum growth
pH (close to neutral)
Move away from optimum growth pH, heat
resistance decreases.
6
Q
GROWTH PHASE
A
Stationary phase cells are more heat resistant
than log phase (exponential) cells
7
Q
PRESENCE OF
INHIBITORY SUBSTANCE
A
Heat resistance decreases in the presence of
antibiotics, SO2
and other microbial inhibitors
Heat in combination with antibiotics or nitrite is more effective in controlling microbes
8
Q
A
