June 21, 2022 We held an IER Special Seminar online.<Dr. WATANABE>

Date & Time

Tue. June 21, 2021, 10:20 am ‒ 11:50 pm JST


Online (Zoom)

Guest Lecturer

Dr. Yoshito Watanabe, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and technology (QST NIRS)

Lecture Title

Biological effects of radiation in Fukushima

In some of the classes of the Master’s Program of Major in Environmental Radioactivity, distinguished external researchers are invited as guest lecturers, and their classes are open to other faculty members on campus as “Special Seminars”.

On June 21, the lecture on the subject “Effects of Radiation Exposure” by Dr. Yoshito Watanabe was attended by five IER graduate school students, and four IER members. Dr. Watanabe explained the basic mechanisms of radiation effects, external and internal exposures formed by radiation of different types (a-, b-, g-), deterministic and stochastic effects in humans, and the dependence of the species radiosensitivity on the interphase chromosome volume based on the results of the long-term g-field experiments. Further, Dr. Watanabe gave examples of radiation damages observed in plant and animal species in Chornobyl and Fukushima (Scots pine, Japanese red pine, Japanese fir, medaka fish, mice, etc.) and analyzed the dose dependencies of their chromosome aberration frequencies. In the Q&A sections, the details of the observations of radiation effects in mice in the Fukushima evacuation zones were discussed. Click here to read the June 28 seminar article.