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Food Preservation Methods

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Questions and Answers

What is the primary mechanism by which freezer burn occurs on frozen food?

Microorganisms breaking down the food's fatty acids

Water condensing onto the surface of the food

Electrical currents being passed through the food

Water evaporating into the package's air spaces (correct)

Which preservation method involves the use of low doses of gamma rays, x-rays, or electrons?

Freezing

Ohmic heating

Pasteurization

Irradiation (correct)

What is the primary purpose of pasteurization?

To change the texture of food

To destroy microorganisms and extend shelf life (correct)

To add flavor and aroma to food

To create a sterile environment for food processing

What is the result of the breakdown of polyunsaturated fatty acids in fats?

Development of rancid flavors and odors Signup and view all the answers

What is the principle behind ohmic heating?

Passing an electrical current through food to generate heat Signup and view all the answers

What is the primary mechanism of water removal in osmotic drying?

Osmosis Signup and view all the answers

What is the term for the process in which a solid changes directly to a vapor without passing through the liquid phase?

Sublimation Signup and view all the answers

What is the purpose of adding salt, sugar, spices, or nitrates in food preservation?

To prevent spoilage Signup and view all the answers

In which region of the world is fermentation still a common method of food preservation?

Asia Signup and view all the answers

What is the primary function of edible coatings in food preservation?

To prevent moisture and gas transfer Signup and view all the answers

What is the process of preserving food through the use of salt and drying?

Curing Signup and view all the answers

What is the primary mechanism of pulsed light food preservation?

Disrupting the cell membranes of bacterial cells Signup and view all the answers

What is the main purpose of irradiation in food preservation?

To sterilize medical equipment and consumer products Signup and view all the answers

What is the process of using ultrahigh pressures to inhibit the chemical processes of food deterioration?

Pascalization Signup and view all the answers

What is the primary advantage of high-pressure processing of foods?

It inactivates foodborne microorganisms at low temperatures Signup and view all the answers

What is the role of ozone in food preservation?

To disinfect and sanitize food products Signup and view all the answers

What is the primary difference between pulsed light and irradiation in food preservation?

Pulsed light is a non-thermal method, while irradiation is a thermal method Signup and view all the answers