Heavy-Ion Effects on Yeast: Survival and Recovery in Vegetative Cells of Different Sensitivity

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Abstract
Wild-type haploid and diploid and radiosensitive haploid yeast strains were exposed to beams of Ar, Kr, Xe, Pb and U ions of different energies (0.3 MeV/u .ltoreq. E/m .ltoreq. 8.5 MeV/u) obtained from the UNILAC, Gesellschaft fur Schwerionenforschung (GSI), Darmstadt, West Germany. The LET.infin. [complete energy transfer] ranged from 2000-14,000 keV/.mu.m. The colony-forming ability after immediate plating and after recovery from potentially lethal damage was investigated. Effects of the central and peripheral regions of the particle tracks could be considered separately. For very heavy particles delayed plating recovery increased with increasing particle speed.

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