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1 янв 1941 г. - Glenn Seaborg discovers plutonium. The U.S. Committee on X‑ray Protection recommends adoption of maximum body burden of 0.1 microCurie for radium. L.S. Taylor recommends lowering the x‑ray exposure dose to 0.02 Roentgens/day.
Добавлено на ленту времени:
Radiation Timeline
By
Joshua Ha
8 июн 2018
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522
Дата:
1 янв 1941 г.
Сейчас
~ 84 г назад
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