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

Introduction to personal safeties, INTRODUCTION : In this unit, we introdu...

INTRODUCTION : In this unit, we introduce you to the fundamental of personal safety code in a laboratory. If you do not have safe laboratory practice, your life and those of your

Advantages of water in chemical weathering, Advantages of water in chemical...

Advantages of water in chemical weathering Water is an essential factor of chemical weathering  and when it contains dissolved salts and acids it is all the more effective. It

Explain adventitia or outer covering, Explain Adventitia or Outer Covering ...

Explain Adventitia or Outer Covering In the thorax, the outer covering is made up of loose fibrous tissue and in the abdomen, the organs are covered through a serous membrane k

How do microbes enter our body?, How do Microbes Enter Our Body? You ha...

How do Microbes Enter Our Body? You have learnt that microbes exist virtually everywhere,  and hence our body is constantly exposed to them. They gain access  to our body throu

Coal & petroleum, write the structure having 7 carbon compound with 3 alt. ...

write the structure having 7 carbon compound with 3 alt. bonds

Determine the quantity of leachate that generated each year, 1. If the land...

1. If the landfill had a compacted density of 600 Kg/m3 a refuse  depth of 9 m (29.5 ft), a moisture content of 20% by volume, and a 1-m  (3.25-ft)-thick clay cover with a 2% slope

Observing the phases of the moon, Observing the phases of the moon Over...

Observing the phases of the moon Over the time of a lunar month have the children make nightly observations and illustrate drawings of the moon. Start at new moon and continue

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