Flosdorf Demonstrates Freeze-Drying of Food
At a glance:
- Series: Great Events: 1900-2001
- Categories: Science, Technology, Inventions, Economics
- Subcategories: Doctors, Physicians, Nurses, Food, Cooking, Cuisine
- Curriculum: American History 1901-1950
- Geographical Location: Pennsylvania
- Date: 1933-1954
Article abstract: Flosdorf developed commercial applications of the freeze-drying of foods.
Freeze-Drying for Preservation
Drying, or desiccation, is known to preserve biomaterials, including foods. In freeze-drying, water is evaporated in a frozen state in a vacuum, by means of sublimation (the process of changing a solid to a vapor without first changing it to a liquid).
In 1811, John Leslie had first caused freezing by means of the evaporation and sublimation of ice. In 1813, William Wollaston demonstrated this process to the Royal Society of...
[The entire page is 968 words long]
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