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Effect of Radiolytic Products on Bacteria in a Food System
Author(s) -
DICKSON J. S.,
MAXCY R. B.
Publication year - 1984
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1984.tb12472.x
Subject(s) - escherichia coli , food science , micrococcus , bacteria , chemistry , nutrient agar , agar , microbiology and biotechnology , acinetobacter , biology , biochemistry , antibiotics , genetics , gene
Inhibitory effects of radiolytic products were studied using Escherichia coli, Pediococcus cerevisiae , and two radiation‐resistant micro‐ organisms, an isolate of Moraxella‐Acinetobacter and a Micrococcus sp. End products of an irradiation dose of 300 Krads completely inhibited resistant organisms on an experimental medium with a very low concentration of nutrients. Plate count agar, with higher nutrient concentration, required 600 Krads to produce the same inhibition. On the same medium, radiation‐sensitive organisms could tolerate products generated by a 1000 Krad dose. However, no inhibition could be detected when either Escherichia coli or Morax‐ella‐Acinetobacter was incubated at 5°C on the surface of fresh meat irradiated to 1500 Krad. The effects of inhibitory products in culture media could be mitigated by the addition of catalase or sodium pyruvate.