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. 1967 Jan;15(1):178–185. doi: 10.1128/am.15.1.178-185.1967

Influence of Culture Media on the Radiation Resistance of Micrococcus radiodurans

K L Krabbenhoft 1,1, A W Anderson 1, P R Elliker 1
PMCID: PMC546865  PMID: 5340165

Abstract

The addition of NZ-case (a tryptic digest of casein) to a growth medium (PC) consisting of tryptone, glucose, and yeast extract caused a significant decrease in γ radiation resistance of Micrococcus radiodurans. The level of radiation resistance was inversely related to the concentration of NZ-case. The ld50 for this organism was approximately 700 krad when grown in tryptone, glucose, yeast extract, and dl-methionine (TGYM) broth, but it was approximately one-half as resistant when grown in a PC medium containing 0.5% NZ-case (PCNZ). The resistance to ultraviolet light was also reduced. Cultures transferred from PCNZ to TGYM media regained the high level of resistance.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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