Letter | Published:

The Cement Block, an Improved Block for Spore-formation in Yeast

Naturevolume 168page385 (1951) | Download Citation

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Abstract

THE gypsum blocks generally used for the production of yeast spores1 often become infected, on repeated use, with spore-forming bacteria, since they will not tolerate the strong heating necessary for adequate sterilization. We have attempted to prepare a block which can stand such sterilization. After trials with various materials, we finally chose a block cast of Portland cement and kieselguhr, which after hardening in carbon dioxide is sufficiently porous.

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References

  1. 1

    Engel, L., “Les ferments alcooliques”, 16 (Paris, 1872).

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Affiliations

  1. Physiological Department, Carlsberg Laboratorium, Copenhagen

    • V. HARTELIUS
    •  & E. DITLEVSEN

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https://doi.org/10.1038/168385a0

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