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In physics and chemistry, flash freezing is the process whereby objects are rapidly frozen. [1] This is done by subjecting them to cryogenic temperatures , or it can be done through direct contact with liquid nitrogen at −196 °C (−320.8 °F).
Rapid freezing, at lower temperatures, gives crystals less time to form and thus does less damage. [12] In 1922, Birdseye conducted fish-freezing experiments at the Clothel Refrigerating Company, and then established his own company, Birdseye Seafoods Inc., to freeze fish fillets with chilled air at −43 °C (−45 °F). In 1924, his company ...
Fluidized bed freezing is a variant of air-blast freezing where pelletized food is blown by fast-moving cold air from below, forming a fluidized bed. The small size of the food combined with the fast-flowing air provides good heat transfer and therefore quicker freezing. Contact freezing uses physical contact other than air to transfer the heat.
His curiosity piqued, and Clarence wondered if this method, called flash freezing, could also be applied to other foods. This 1920s hunting trip to Canada inspired Birdseye's food preserving method. [2] Birdseye conducted experiments and received patents for the development of greatly improved methods to freeze fish for commercial production.
One of the main advantages of this method of preparing frozen food is that the freezing process takes only a few minutes. The exact time depends on the type of IQF freezer and the product. The short freezing prevents formation of large ice crystals in the product's cells, which destroys the membrane structures at the molecular level.
Freezing is a common method of food preservation that slows both food decay and the growth of micro-organisms. Besides the effect of lower temperatures on reaction rates, freezing makes water less available for bacteria growth. Freezing is a widely used method of food preservation. Freezing generally preserves flavours, smell and nutritional ...
The food undergoes a process of cryogenic freezing with liquid nitrogen. After the food is placed on the conveyor belt, it is sprayed with liquid nitrogen that boils on contact with the freezing food. This method of flash-freezing fresh foods is used to retain natural quality of the food.
A factory ship, also known as a fish processing vessel, is a large ocean-going vessel with extensive on-board facilities for processing and freezing caught fish or whales. Modern factory ships are automated and enlarged versions of the earlier whalers , and their use for fishing has grown dramatically.