Abstract
Kyoto University Radiation Biology Center possesses "Low Dose and Low Dose-rate Irradiation System", "Cs-137 Gammacell 40 Exactor", "High Dose-rate Orthovoltage X-ray Irradiator" and "Alpha-particle Irradiator". So far, cooperative researches has been carried our to use these machines. Currently, about forty cooperative researches were accepted in each year. Moreover, new kinds of cooperative researches, which use experimental techniques and knowledge of the staffs in Radiation Biology Center, are being carried out and many important results are expected in these researches.