Explain teh term cryogenic freezing, Science

Assignment Help:

Cryogenic Freezing, as you would realize, is one of the fast, flexible and cheap method of freezing. In this, the liquefied gases are placed in direct contact with the foods. Food is exposed to an atmosphere below - 60°C  through direct contact with liquid nitrogen or liquid carbon dioxide or their vapor. This is a very fast method of freezing, thus adequate control is necessary for achieving quality products. It also provides flexibility by being compatible with various types of food products and having a low capital cost. The rapid formation of small ice crystals greatly reduces the damage caused by cell rupture, preserving color, texture, flavor and
nutritional value. The rapid freezing also reduces the evaporative weight loss from the products, provides high product throughput and has low floor space requirements.  
 
The cryo-mechanical technique utilizes a cryogenic gas to create a frozen crust on a fluid product, after which the product may be conveyed to a conventional mechanical freezer. The advantages of liquid nitrogen are that it is colorless, odorless and is chemically inert and boils at 195.8°C. It is usually used for high-value products due to the high  capital cost for gas compression. The product can be exposed to a cryogenic medium in three was: 

(a) The cryogenic liquid is directly sprayed on the product in a tunnel freezer.
(b) The cryogenic liquid is vaporized and blown over the food in a spiral freezer or batch freezer.
(c) The product is immersed in the cryogenic liquid in an immersion freezer.


Related Discussions:- Explain teh term cryogenic freezing

Heterotrophic nutrition, how many types of heterotrophic nutrition in plant...

how many types of heterotrophic nutrition in plants?..

Transformation of medieval economy, The Transformation of Medieval Economy:...

The Transformation of Medieval Economy: The new techniques led to greater production in  agriculture and, therefore, a surplus from the needs of  people. Increased productivi

White lipped tree frog, how does reproduction help the white lipped tree fr...

how does reproduction help the white lipped tree frog survive

State the meaning of low tensile strength, State the meaning of Low tensile...

State the meaning of Low tensile strength Low tensile strength and chances of consequent cracking and deterioration of  load bearing capacity of  structural components, we wis

ATOMS AND MOLECULES, in a reaction 5.3g of sodium carbonate reacted with 6g...

in a reaction 5.3g of sodium carbonate reacted with 6g of ethanic acid. theproducts were 2.2 g of carbon dioxide , 0.9g water and 8.2 g of sodium ethanoate, show that these observa

Friction, essay on friction is a necessary evil

essay on friction is a necessary evil

Determine the most important soil animals, Explain why earthworms are said ...

Explain why earthworms are said to be the most important soil animals. Earthworms ingest organic matter as well as soil where they mix, granulate and excrete to increase stabil

Determine about the chemical weathering, Determine about the Chemical weath...

Determine about the Chemical weathering Chemical weathering is accelerated by the presence of oxygen, and organic and inorganic acids resulting from the microbial breakdown of p

State about the soil aggregation and soil structure, State about the Soil A...

State about the Soil Aggregation and Soil Structure In the context of soils the term 'structure' refers to the shape that the soil takes. It may exist as individual particle or

What is the rock cycle explain briefly, What is the rock cycle explain brei...

What is the rock cycle explain breifly? The rock cycle is the full "life" of a rock from its original formation to its demise through weathering, and rebirth through recrystall

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd