Unformatted text preview: enclosed vessel and steam builds up inside creating pressure High pressure allows higher temperature than boiling to be achieved Commercial food canning designed to destroy endospores of Clostridium botulinum Physical Methods Heat Physical Methods Heat Pasteurization: Ultrahigh temperature (UHT) method used for some milk and juice products
Long shelflife of product: 140150°C for 13 sec Milk and milk products Flash pasteurization (high temperature short term HTST) also used
72°C for 15 sec Used with things like eggs (i.e. Eggbeaters) Refrigeration: Physical Methods Low Physical Methods Low Temperatures 4°C retards growth of nonpsychrophiles If materials left at room temperature or warmer, mesophiles can then begin growing causing spoilage Freezing: 0°C retards growth of most organisms When warmer temps are provided, growth resumes does no...
View Full Document
- Fall '09
- Bacteria, Methods Chemical Methods, Chemical Methods Chemical, Antimicrobial Treatments