Mathematical Model of DSB formation by Ionizing Radiation
  The understanding of inactivation radiobiological mechanism in individual cells is important when from one side the application of ionizing radiation to tumour therapy and from the other side the protection against radiation are to be effectively improved. Important part of this mechanism is double-strand break (DSB) formation; these DSB may be formed directly by impacting ionizing particles or indirectly by different secondary radicals. The latter kind of formation is much more frequent when cells contain normal water content. Mathematical model of the corresponding chemical stage will be presented with the aim to demonstrate how the individual radicals, but also other chemical agents present in the water during irradiation may influence DSB formation. 
J. Barilla, M. Lokaj\'i\v{c}ek, P. Simr