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  • Title: Density, porosity, and structure of dried cell walls isolated from Bacillus megaterium and Saccharomyces cerevisiae.
    Author: Scherrer R, Berlin E, Gerhardt.
    Journal: J Bacteriol; 1977 Feb; 129(2):1162-4. PubMed ID: 402351.
    Abstract:
    Helium displacement and nitrogen adsorption techniques were used to determine the density and porosity, respectively, of freeze-dried cell walls isolated from Bacillus megaterium KM and Saccharomyces cerevisiae. The densities were 1.302 and 1.180 g/cm3, respectively, suggesting noncrystalline solids. The porosities were extremely small, indicating that the cell walls had collapsed and become essentially impervious upon lyophilization.
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