Cooling Processes

What is the main reason for quality deterioration in frozen foods?

• Increased microbial activity

• Formation of large ice crystals

• Concentration of solutes in the unfrozen phase

• Loss of fat-soluble vitamins

What is the primary purpose of supercooling in food preservation?

• Enhance enzymatic activity

• Reduce the formation of ice crystals

• Accelerate freezing processes

• Increase oxygen solubility

Which vitamin is particularly sensitive to temperature changes during freezing?

• Vitamin D

• Vitamin E

• Vitamin C

• Vitamin K

What happens if the cooling rate during freezing is too slow?

• Formation of tiny, uniform ice crystals

• Reduced enzyme activation

• Formation of large, irregular ice crystals

• Improved nutrient retention

What is a major disadvantage of the supercooled state in foods?

• Enhanced nutrient retention

• Increased stability

• Unstable and prone to nucleation

• Extended shelf life

What does controlled nucleation during freezing help to achieve?

• Enhanced enzyme activation

• Formation of smaller ice crystals

• Increased oxygen solubility

• Accelerated lipid oxidation

What technique uses a high-voltage electric field to maintain a supercooled state?

• Inazuma freshness preservation

• Cryoprotective freezing

• Stepwise cooling algorithm

• Vacuum sealing

How does stepwise cooling reduce structural damage in frozen fish?

• By accelerating freezing rates

• By reducing ice crystal growth

• By enhancing enzyme activity

• By increasing oxygen solubility

What is the effect of cryoprotectants in food preservation?

• Improve enzyme activity

• Safeguard cellular structures

• Accelerate lipid oxidation

• Reduce storage time

What storage technique helps mitigate oxidation-related nutrient losses?

• Stepwise cooling

• Vacuum-sealed environments

• High-temperature freezing

• Rapid cooling rates