Refrigeration

Definition

Refrigeration is the process of lowering the temperature of an environment or substance to slow down microbial growth. It is commonly used for preserving food and biological samples.

5 Must Know Facts For Your Next Test

1. Refrigeration slows microbial metabolism, thereby delaying spoilage and extending shelf life.
2. Most pathogenic bacteria are unable to grow at refrigeration temperatures (0-4°C).
3. Psychrotrophs are a type of bacteria that can still grow at refrigeration temperatures, but their growth rate is significantly reduced.
4. Refrigeration does not kill microorganisms; it only inhibits their activity and reproduction.
5. Regular monitoring and maintaining appropriate refrigeration temperatures are crucial for effective microbial control.

Review Questions

• How does refrigeration affect microbial metabolism?
• What is the typical temperature range for effective refrigeration?
• Why doesn't refrigeration kill microorganisms?

Related terms

Freezing:

A method that lowers temperatures below freezing point to halt all microbial activity.

Pasteurization:

A process that uses controlled heat to reduce the number of pathogens in food and beverages.

Sterilization:

A method that completely eliminates all forms of microbial life, including spores.