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An identification of Pile dipeptide from L-phenylalanine mononlers after keV nitro-gen and argon ion implantation,by using the HPLC (high performance liquid chromatography)and LC-MS(liquid chromatography mass spectrometer) methods is reported.The results showeda similar yield behavior for both ion species,namely:1) the yield of dipeptides under alkalescentconditions was distinctly higher than that under acidic or neutral conditions;2) for different ionspecies,the dose-yield curves tracked a similar trend which was called a counter-saddle curve.Thedipeptide formation may implicate a recombination repair mechanism of damaged biomoleculesthat energetic ions have left,in their wake.Accordingly a physicochemical self-repair mechanismby radiation itself for the ion-beam radiobiological effects is proposed.
An identification of Pile dipeptide from L-phenylalanine mononlers after keV nitro-gen and argon ion implantation, by using the HPLC (high performance liquid chromatography) and LC-MS (liquid chromatography mass spectrometer) methods is reported. Results showed a similar yield behavior for both ion species, namely: 1) the yield of dipeptides under alkalescent conditions is distinctly higher than that under acidic or neutral conditions; 2) for different ionspecies, the dose-yield curves tracked a similar trend which was called a counter-saddle curve. Thedipeptide formation may implicate a recombination repair mechanism of damaged biomoleculesthat energetic ions have left, in their wake. Accredited a physicochemical self-repair mechanismby radiation itself for the ion-beam radiobiological effects is proposed.