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Microbial spoilage of dried prunes: III. Relation of equilibrium relative humidity to potential spoilage

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  • Tanaka, Hirosato
  • Miller, M. W.

Abstract

Dried prunes equilibrated in atmospheres of various relative humidities were inoculated with selected strains of Aspergillus glaucus, A. niger, Penicillium sp., and Saccharomyces rouxii. At 20° C the strains of A. glaucus and S. rouxii grew on prunes equilibrated at relative humidities as low as 76 per cent, but not at 69 per cent, in a four-month period. The strains of A. niger and of Penicillium sp. grew well on prunes equilibrated at 93 per cent relative humidity but failed to grow on those equilibrated at 87 per cent. At 30° C, only the strain of S. rouxii grew on prunes equilibrated at 85 per cent relative humidity. All strains tested, however, grew at 97 per cent.

Suggested Citation

  • Tanaka, Hirosato & Miller, M. W., 1963. "Microbial spoilage of dried prunes: III. Relation of equilibrium relative humidity to potential spoilage," Hilgardia, California Agricultural Experiment Station, vol. 34(6).
    • Handle: RePEc:ags:hilgar:381709
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    File URL: https://ageconsearch.umn.edu/record/381709/files/v34n06p183.pdf
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