Explain about the drying - methods of food processing, Biology

Assignment Help:

Explain about the Drying - methods of food processing?

Drying is the oldest and probably the simplest way of preserving food. It is usually accomplished by the removal of water. Dried foods are preserved because the available moisture level is so low that the microorganisms cannot grow and enzyme activity is controlled. Moisture from food may be removed by a number of methods: drying by the Sun's rays and by the modern artificial ones. Grains and nuts were the first foods to be dried under the sun and air. However, sun-drying is a slow process, risk of contamination and spoilage and is limited to climates with a hot Sun and a dry atmosphere and to certain fruits such as grapes (raisins), figs, dates, apricots, raw mangoes (amchur), pears and peaches.

Vegetables like beans, peas, cabbage, cauliflower, lady fingers, garlic, onions, chillies, turmeric and all leafy vegetables can also be dried by sun-drying. Drying of fruits and vegetables involves washing, peeling, preparing and spreading on flat bottom trays and drying under Sun. Fish (Bombay duck) and shrimps are dried by exposing them to the Sun on the seashore. The word dehydration usually implies the use of controlled conditions of heating, with the forced circulation of air or artificial drying (mechanical drier) as compared with the use of sun-drying. Using mechanical driers, fruits, fruit leathers, banana chips, tea, coffee, milk, soups, fish, meat, eggs and vegetables can all be dried year-round. Dried foods are compact and lightweight; do not require refrigeration and last much longer than the fresh foods. Dried foods should be stored in airtight containers to prevent moisture from rehydrating the products and allowing microbial growth.


Related Discussions:- Explain about the drying - methods of food processing

Show very low level of lactase activity, Q. Show Very low level of lactase ...

Q. Show Very low level of lactase activity? Very low level of lactase activity: at very low level of lactase activity all milk products must be eliminated, substitutes of milk

What is the difference between taeniasis and cysticercosis, Q. What is the ...

Q. What is the difference between taeniasis and cysticercosis? The Taeniasis is the parasitic disease caused by the adult tapeworm installed within the human intestine. The

VIRUSES, WHAT IS THE TYPICAL REPRODUCTION CYCLE OF A DNA VIRUS

WHAT IS THE TYPICAL REPRODUCTION CYCLE OF A DNA VIRUS

Engler and prantls system of classification, Q. Engler and Prantl's System ...

Q. Engler and Prantl's System of Classification? Adolf Engler, Professor of Botany, University of Berlin, Germany, proposed a phylogenetic system of classification in a book en

Knock-out experiment, Knock-out experiment  is a method for deleting, mutat...

Knock-out experiment  is a method for deleting, mutating or otherwise inactivating the gene in a mouse. This laborious technique involves transfecting a crippled gene into cultured

What do you mean by ulcerative colitis, Q. What do you mean by Ulcerative C...

Q. What do you mean by Ulcerative Colitis? Let us understand clearly about ulcerative colitis by reading the following case. Varun, a 48-year-old male, had a very successful

Explain glucose molecule runs the krebs cycle twice, Why can it be said tha...

Why can it be said that each glucose molecule runs the Krebs cycle twice? Every glucose molecule "cycles" the Krebs cycle twice because after glycolysis each used glucose has g

How are the antibodies against the rh factor formed, How are the antibodies...

How are the antibodies against the Rh factor formed? Anti-Rh antibodies are made by humoral immune response. When an Rh- individual makes contact with the Rh factor this is rec

Describe the implant in an infected socket, Placement of the Implant in an ...

Placement of the Implant in an Infected Socket or a Pathologic Lesion Dental implants may fail due to: 1) Placement of the implant fixture into an infected socket (during im

Class of crustacea - branchiopoda, Class of Crustacea - Branchiopoda ...

Class of Crustacea - Branchiopoda These are small fresh water crustaceans. The trunk appendages are flattened and leaf like and are helpful for locomotion also respiration he

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