Abstract

In the past cellular fast-mixing techniques have been used to investigate the time resolution of radiation processes that lead to modification of radiation response in bacterial and mammalian cellular systems. So far, published studies have been confined to effects with low-LET electron beams. The brief for this paper was to discuss where, and under what conditions, such a technique could be used to advantage with high-LET particle beams. Criteria for the experimental design, including conditions of flow rate, dose rate, and mixing times, are discussed. Radiobiological problems appropriate for applications of fast-particle beams are also discussed. These include studies to reveal possible multicomponents in cellular sensitization by oxygen and electron-affinic radiation sensitizers, studies designed to assist in the resolution of direct and indirect effects, and resolution of intracellular DNA damage.

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