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Density, porosity, and structure of dried cell walls isolated from Bacillus megaterium and Saccharomyces cerevisiae
- Scherrer, R., Berlin, E., Gerhardt, P.
- Journal of bacteriology 1977 v.129 no.2 pp. 1162
- yeasts, Saccharomyces cerevisiae, Bacillus megaterium, cell walls, density, porosity, freeze drying
- 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.