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冷冻升华干燥
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冷冻升华干燥
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冷冻升华干燥
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freeze drying
冷冻升华干燥
先将物料冷冻至水的冰点以下,并置于高真空(操作压力10~40帕)的容器中,通过供热使物料中的水分直接从固态冰升华为水汽,再经真空泵排出干燥室而使物料干燥的方法。又称真空冷冻干燥。
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Lawrence Vambe
Lawrencium
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Lawren Stewart Harris
Laws about Library of Congress
laws amendment during Late Qing Dynasty
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