Food Processing and Storage

Drying, or dehydration, removes moisture from food, which prevents bacteria, yeast, and mold from growing since they need water to survive. Freezing slows down growth using cold temperatures, while pasteurization uses heat.

Canning involves placing food in jars or cans and heating them to a temperature that destroys microorganisms, then sealing them to prevent new bacteria from entering. This creates an airtight vacuum seal.

Refrigeration keeps food cold (typically between 32 and 40 degrees Fahrenheit, though the broader range of 28 to 65 degrees covers cool storage) to slow down the growth of bacteria. Pasteurization and irradiation use heat and radiation, respectively, to preserve food.

Pasteurization is a process named after Louis Pasteur that applies mild heat to liquids, like milk or juice, to eliminate pathogens and extend shelf life without significantly altering the food's composition. Canning also uses heat but specifically involves sealing food in airtight containers.

Food irradiation exposes food to ionizing radiation, such as gamma rays or electron beams, to kill bacteria, parasites, and insects. This process extends shelf life and improves food safety without making the food radioactive.

Freezing is the preservation method where water within the food cells is turned into ice, which effectively stops microbial growth and slows down chemical reactions. Other options like pasteurization use heat, while drying removes water entirely.

Food additives are substances added to food to preserve flavor, enhance taste, or extend shelf life. Other methods like canning or irradiation do not primarily rely on adding external substances to the food.

Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes from bacteria or yeasts. This chemically alters the food, unlike physical preservation methods like drying or canning.

The standard 3 P's of food safety typically refer to preventing contamination, proper storage, and preparation. Preservation is a method of extending shelf life rather than a core daily food safety handling pillar.

Food preservation refers to any method used to prevent food from spoiling, thereby extending its shelf life and keeping it safe for consumption over a longer period.

Pasteurization is a process of heat treatment that kills pathogenic microorganisms in certain foods and beverages, such as milk and juice, without significantly altering their nutritional value.

In food science, drying methods can be categorized into chemical drying (using desiccant agents), freezing (freeze-drying or lyophilization), and mechanical drying (using hot air or dehydrators). These three methods are primary mechanisms used to remove moisture from food.

Diazonium salts are light sensitive and break down under near UV or violet light.This is why it is used immedietly after being prepared so that it does not loses its properties.

Both High-Pressure Processing (HPP) and irradiation are effective food safety technologies used to reduce or eliminate pathogenic microbial contamination in raw pet foods without cooking them.

Canned goods are shelf-stable and processed to last for long periods, often several years if stored properly. Frozen meats, bottled water, and potato chips have shorter shelf lives or quality degradation periods.