How did "dehydrated vegetables" come about?

Originally titled: "Dehydrated Vegetables" How Did You Get It?
life, when we eat bubble noodles, there is often a packet of dehydrated vegetables, then, do you know how dehydrated vegetables are made?
dehydrated vegetables are dried vegetables made after artificial heating to dehydrat most of the vegetables. Common dehydrated vegetables include algae, beans, celery, green peppers, cucumbers, etc. , usually soaked in hot water for a few minutes, can be eaten. So, what are the ways to make dehydrated vegetables?
dehydrated vegetables according to its dehydration method can be divided into natural drying, hot air dry dehydration and frozen vacuum dry dehydration.
drying is the use of natural conditions to dehydrat vegetables, in ancient times, people have begun to apply this method. The principle of hot air drying dewatering technology is to vaporize the moisture of vegetable surface into the air by dry hot air, improve the concentration of vegetable surface contents, form the osmotic pressure difference of connected inner cells, and make the water of the inner layer diffuse to the outer layer flow, so that moisture continues to vaporize. The principle of frozen vacuum dry dehydration technology is to quickly freeze the drained material, so that the remaining moisture in the material is converted into ice, and then under vacuum conditions, the water molecules are directly sublimation from solid state to Huawei gas state, thus completing dehydration.
Natural drying and hot air dry dehydration in the processing process, will lose a lot of water-soluble vitamins and biological active ingredients, vegetable color is also easy to darken;
Dehydrated vegetables are widely used in almost all areas of food processing, it can not only be used to improve the nutritional content of products, increase product color and flavor, but also to make the variety of products more abundant, greatly improve the food structure of the vast number of consumers.
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