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

Estimate the moisture content and density, 1. The composition of solid wast...

1. The composition of solid waste from a residential community is as follows: Component Percent by weight Combustibles ---

Fractures-first aid treatment of localized injuries, Fractures : It is not...

Fractures : It is not our intention to introduce you to many types of fractures that can occur or all the ways a first aider might deal with them. The essential thing is that you

Land use planning and management, Land Use Planning and Management: P...

Land Use Planning and Management: People see land everywhere and get an impression that plenty of it  is available. Besides,  they do not care how  it is being used, unless o

Explain the process of filtration - formation of urine, Explain the Process...

Explain the Process of Filtration - Formation of Urine The kidneys form urine in three phases: simple filtration, selective re-absorption and secretion. Let us begin with the p

Define minerals - calcium, Define Minerals - Calcium, Phosphorous and Iron?...

Define Minerals - Calcium, Phosphorous and Iron? Minerals are inorganic substances. This means they are not formed by living matter and contain no carbon. Minerals used in the

Enumerate in brief about the earthworms, Enumerate in brief about the Earth...

Enumerate in brief about the Earthworms There are several species of earthworms, having slender cylindrical bodies with varying diameters. These organisms ingest the dead organ

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

Stars in the limelight , Stars in  the Limelight: Among Galilee's my di...

Stars in  the Limelight: Among Galilee's my discoveries with the telescope was his observation that the white nebulous band  In  the sky known as the Milky Way (Akash cranga) w

Kind of flowers, how do some flower make there own food

how do some flower make there own food

To show that liquids exert pressure, To show that liquids exert pressure ...

To show that liquids exert pressure Connect two 15 cm lengths of glass tubing or two transparent plastic soda straws with a short length of rubber tubing and attach them to an

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