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

Explain change of posture - decreased cardiac output, Explain Change of pos...

Explain Change of posture - Decreased Cardiac Output When a person stands up from lying down posture, there is an immediate but transient fall in systolic blood pressure. This

Determine if flow will choke and downstream and upstream, A nearly horizont...

A nearly horizontal,12 ft wide rectangular channel carries 60cfs at a depth of 3.0ft.The width of the channel is smoothly contracted to 6 ft at the downstream section. (a) Deter

Explain the physiology of lactation, Explain the Physiology of Lactation ...

Explain the Physiology of Lactation Lactogenesis is the onset of copious milk secretion around parturition, triggered by a fall in plasma progesterone levels. Although some col

Chemicals in medicines., I want conclusion for the above topic. please help...

I want conclusion for the above topic. please help me out.

Eye injuries-first aid treatment of localized injuries, Eye Injuries : The...

Eye Injuries : The eyes are a particularly vulnerable part of your body. Safety glasses, goggles or a face shield are a 'must' for any experiment where there is any , danger of sp

How you can observe the buoyancy of water, You can observe the buoyancy of ...

You can observe the buoyancy of water Make an equivalent arm balance. Secure two soda water-bottles and suspend them with loops of string from either side of the arm. Unless th

Assingment, how to do assingment phylum annelida

how to do assingment phylum annelida

Define the functions of platelets, Define the functions of platelets Th...

Define the functions of platelets The main function of platelets, or thrombocytes, is to stop the loss of blood from wounds, i.e. haemostasis. Let us learn about this function.

Classification of fires, Classification of Fires As explained also. W...

Classification of Fires As explained also. We can say that the four main sources of fire risk in the science laboratory are: i) flammable substances, ii) compressed and

Explain the types of sedimentary rocks, Explain the Types of sedimentary ro...

Explain the Types of sedimentary rocks? What is a sedimentary rock? The word sedimentary is derived from the Latin word sedimentum which means "settling", which refers to a so

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