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one. During the freeze-drying process, the growth of microorganisms and the action of the enzyme cannot be carried out, so that the original sexual appearance can be maintained. Since the drying is carried out in a frozen state, the volume is almost constant, the original structure is maintained, and concentration does not occur.
two. Since drying is carried out under vacuum, there is very little oxygen, so some oxidizable substances are protected.
three. Drying can eliminate more than 95-99% of water, so that the dried product can be preserved for a long time without deterioration.
four. The dried material is porous and spongy. After adding water, it dissolves quickly and completely, and the original trait is almost immediately restored.
Fives. Freeze drying is carried out at low temperatures and is therefore particularly suitable for many heat sensitive materials. Such as protein, microorganisms and the like will not degenerate or lose biological vitality. Therefore, it is widely used in medicine.
six. When drying at low temperatures, some of the volatile components in the material are lost, suitable for some chemical products, pharmaceuticals and food drying.
Application examples of freeze dryer technology
Freeze dryer technology has a wide range of applications in the fields of bioengineering, pharmaceutical industry, food industry, materials science and deep processing of agricultural and sideline products. Freeze drying has the following advantages: