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EXTRINSIC FACTORS - Coggle Diagram
EXTRINSIC FACTORS
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TEMPERATURE OF STORAGE
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Enzymatic reaction depend on temperature. If rise 10 degree celcius will double the catalytic rate of enzyme whereas every 10 degree decrease will reduce only half of the rate.
Bacteria involved:
Mesophilic
- Grow between 25 and 40 degree celcius with an optimum temperature 37 degree celcius.
- Pseudomonas aeroginosa grow at 5-43 degree celcius.
- Zero grow below 5 degree celcius or above 45 degree celcius.
Thermophilic
- Grow above 45 degree celcius, optimum between 50 & 70 degree celcius and some occur at 80 degree celcius.
- Spore formers and involve a lot in processed foods.
Psychrophilic
- Best grow at 20 degree celcius nd down to -20 degree celcius (unfrozen)
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