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

Six forms of prejudice, Name the six forms of prejudice that Brislin discus...

Name the six forms of prejudice that Brislin discusses and illustrate each with a South Africa example; 1.  Red-neck racism - a typical form of this prejudice is Julius Malema

Safety spectacles in personal protective devices, Safety spectacles : Safe...

Safety spectacles : Safety spectacles need to be used where there is the slightest risk of splashes of chemicals or fragments of dust, glass, etc. getting into the eyes.

Turing Machine, How do i make the simulator write a program for a Turing Ma...

How do i make the simulator write a program for a Turing Machine to detect sequences of 1s and 0s that ends in “0”?

Explain the hyperinsulinism - insulin, Explain the Hyperinsulinism - Insuli...

Explain the Hyperinsulinism - Insulin Too much secretion of insulin or over treatment of a diabetic person with insulin may cause hyperinsulinism. In this condition, the blood

Physical Science, If more of substance b dissolves b has a higher what than...

If more of substance b dissolves b has a higher what than substance a

Social scientists, Write an essay to answer the following question: How ca...

Write an essay to answer the following question: How can social scientists explain human behaviour scientifically?Discuss the merits and limitations of the applications of the sci

Conversion of oxaloacetate to phosphoenolpyruvate, Conversion  of  oxaloa...

Conversion  of  oxaloacetate to phosphoenolpyruvate Conversion  of  oxaloacetate to phosphoenolpyruvate:  In  this  reaction, oxaloacetate and guanosine triphosphate (GTP) are

Explain immunoassay - antigen-antibody interaction, Explain Immunoassay - a...

Explain Immunoassay - antigen-antibody interaction Immunoassay : This helps us to measure concentration of Ag derived from infectious organism or to measure specific Ab bound

Explain teh term cryogenic freezing, Cryogenic Freezing, as you would reali...

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

Procedure of disposal of microbial cultures, Procedure : Steps 1 to 3 and ...

Procedure : Steps 1 to 3 and step 5 are demonstration steps and will be performed by your counsellor. Observe these steps carefully. 1. The cotton plugs/caps of the test tubes,

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