a method of drying food or blood plasma or pharmaceuticals or tissue without destroying their physical structure; material is frozen and then warmed in a vacuum so that the ice sublimes
Viability of freeze dry method microbial strains by using different concentrate of protectant and different freeze temperature was examined. 研究了微生物菌株在真空冷冻干燥保藏中，不同浓度的保护剂和不同冻干温度对存活性的影响。
So the critical point drying method is better than the natural drying method for palynology research. 进行孢粉学研究，临界点干燥法优于自然干燥法。
In spray drying, a droplet of slurry of CaOH is introduced from the top, and a dry product results, after its contact with flue gas. 在喷淋干燥法中，氢氧化钙浆状物的液滴从燃烧炉的顶部加入，与燃烧废气接触后，变为干燥物。
