Refrigeration and Freezing

Front

What method of food storage likely began with prehistoric humans?

Back

FREEZING and refrigeration

Front

Who pioneered mechanical refrigeration and in what year?

Back

John Gorrie in 1842.

Front

What innovation did Clarence Birdseye develop in the 1920s?

Back

Equipment and packaging for quick-freezing.

Front

What did C.A. Swansons and Sons introduce?

Back

Frozen TV dinners.

Front

What temperature should refrigerators be kept at?

Back

0°C to 4°C (32°F to 40°F).

Front

What temperature should freezers be kept at?

Back

At or below 0°C (32°F).

Front

What is one advantage of refrigeration and freezing?

Back

Does not cause chemical or physical change to food.

Front

Why does freezing allow food to be stored longer than refrigeration?

Back

It inhibits enzyme activity and microbial growth to a greater degree.

Front

What is a disadvantage of freezing food?

Back

Water in food expands and forms ice crystals.

Front

What effect does ice crystal formation have on food?

Back

It disrupts the structure of plant and animal cells, resulting in a softer texture after thawing.