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

Is it possible x chromosome of women come from father, Is it possible that ...

Is it possible that an X chromosome of a woman can have come from her father? It isn't only possible that an X chromosome of a woman is from her father, it is certain. Each wom

List various type of insulin, Q. List various type of insulin? Types of...

Q. List various type of insulin? Types of insulin: a) Rapid or Short acting b) Intermediate c) Combination d) Long acting

Chordates, what are the general characters of chordates? At least 10 charac...

what are the general characters of chordates? At least 10 characters.

How to prevent hiv-infection, HIV-Infected patients Because TB therapy ...

HIV-Infected patients Because TB therapy is complicated by co-infection with HIV, testing for HIV infection is recommended for all patients with active tuberculosis. To minimiz

Explain assessment of iron status - serum ferritin, Explain assessment of i...

Explain assessment of iron status - Serum Ferritin? Serum Ferritin: This method is indicative of iron stores. As we know, a long term negative iron balance first results in dep

Explain the procedure for morphological study of fungi, Explain the Procedu...

Explain the Procedure for Morphological Study of Fungi? Now carry out the exercise, following the steps enumerated herewith: 1. Prepare a humid chamber by placing two-three

Ovule, Ovule The ovule, also known as the megasporangium is the forer...

Ovule The ovule, also known as the megasporangium is the forerunner of the seed. It consists of a central mound of tissue called the nucellus, which is enveloped by one or tw

Advances in mineral and vitamin nutrition of livestock, Advances in Mineral...

Advances in Mineral and Vitamin Nutrition of Livestock Even though, minerals and vitamins as nutrients are as essential as energy and protein, general negligence occurs primari

Briefly explain what is the leaf, Briefly explain what is The Leaf? In a ...

Briefly explain what is The Leaf? In a typical dicot, leaf primordia arise from the apical meristem, which is housed within the terminal bud on a shoot. The leaf cells are produc

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