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

AQA Additional Science, Whats an easy way to work out force, mass and accel...

Whats an easy way to work out force, mass and acceleration

Laser, LASER stands for Light Amplification by Stimulated Emission of Radia...

LASER stands for Light Amplification by Stimulated Emission of Radiation: It's a fairly long string of words. Well, don't  let it stop you  from reading further. What we wish t

Experiment of sinking bodies, Sinking bodies Fill the overflow can with...

Sinking bodies Fill the overflow can with water to the level of the spout. Select a stone that will go inside the overflow can. Attach a string to the stone and weigh it with a

Explain the urine creatinine test, Explain the Urine Creatinine Test Th...

Explain the Urine Creatinine Test This test measures the amount of creatinine in urine. A measurement of the serum creatinine level is often used to evaluate kidney function. U

#titleAI, I need to write a research paper on AI

I need to write a research paper on AI

Calculate the volume of paper wastes and miscellaneous waste, 1. The solid ...

1. The solid wastes from a summer camp with 100 children and a staff of 25 are to be collected once per week. If bottles and cans (representing 20% of the weight) are removed, pape

The industrial revolution (1760-1830), We will first give a brief descript...

We will first give a brief description of  the qocial and economic changes of  this period so  that developments in science can be seen in the proper perspective. Already, by  the

Compare and contrast the different types of igneous rocks, 1.) Referring di...

1.) Referring directly to the locations of igneous activity identified on the below diagram (figure 5), and restricting yourself to any of the following terms and rocks (sedimentar

Define inzmunoglobulin d - classification of antibodies, Define Inzmunoglob...

Define Inzmunoglobulin D - classification of antibodies Present on surface of B lymphocytes, along with IgM plays a role in Ag recognition.

Define aquaculture, QUESTION 1 (a) Define aquaculture (b) What is th...

QUESTION 1 (a) Define aquaculture (b) What is the importance of aquaculture? (c) Name 4 aquaculture species cultured in Mauritius. (d) List down the criteria for selec

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