| Literature DB >> 5340165 |
K L Krabbenhoft, A W Anderson, P R Elliker.
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 gamma radiation resistance of Micrococcus radiodurans. The level of radiation resistance was inversely related to the concentration of NZ-case. The ld(50) 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.Entities:
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Year: 1967 PMID： 5340165 PMCID： PMC546865 DOI： 10.1128/am.15.1.178-185.1967
Source DB: PubMed Journal: Appl Microbiol ISSN： 0003-6919