AbstractAbstract
[en] Growth rates and total population of E. coli were reduced fourfold when natural KCl (/sup N/KCl) in the medium was replaced by 39KCl from a particular source. A prolonged lag period was noted in cultures containing either /sup N/KCl or 39KCl when inoculated with bacteria adapted to 39KCl. These changes were not due to endogenous radiation because these differences were not observed when (a) the KCl concentrations were reduced from 50 to 5 mM and (b) the 39KCl from the prime source was replaced with 39KCl from a second source; also the addition of 40KCl to 39KCl did not improve growth. These results suggest that the 39KCl from the primary source contained an unidentified inhibitor that is not readily detected by physical and chemical analyses. 8 references, 3 figures, 2 tables
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Argonne National Lab., IL (USA); p. 70-76; Mar 1984; p. 70-76; Available from NTIS, PC A09/MF A01 as TI84008870
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