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Tunnel freezing is a variant of air-blast freezing where food is put onto trolley racks and sent into a tunnel where cold air is continuously circulated. 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 ...
BISE Peshawar was established in 1961 by the Government of Khyber Pakhtunkhwa.Previously, it was conducting the examination of intermediate and secondary education for the whole Khyber Pakhtunkhwa province but later, new educational boards were established in Khyber Pakhtunkhwa by the government and now its jurisdiction is Peshawar Division.
This technology has seen impressive improvements and developments during the past 20 years, being suited for an increasing range of products. [ 5 ] Cryogenic IQF freezers immerse the product in liquid nitrogen at very low temperatures, freezing it rapidly while continuously moving the product to avoid block or lump formation. [ 5 ]
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 primary purpose of freeze drying within the food industry is to extend the shelf-life of the food while maintaining the quality. [1] Freeze-drying is known to result in the highest quality of foods of all drying techniques because structural integrity is maintained along with preservation of flavors. [ 1 ]
Snap freezing (or cook-chill or blast freezing) is the process of rapid cooling of a substance for the purpose of preservation. It is widely used in the culinary and scientific industries. It is widely used in the culinary and scientific industries.
Fractional freezing is a process used in process engineering and chemistry to separate substances with different melting points. It can be done by partial melting of a solid, for example in zone refining of silicon or metals , or by partial crystallization of a liquid, as in freeze distillation , also called normal freezing or progressive ...
Food preservation includes processes that make food more resistant to microorganism growth and slow the oxidation of fats. This slows down the decomposition and rancidification process. Food preservation may also include processes that inhibit visual deterioration, such as the enzymatic browning reaction in apples after they are cut during food ...