3 results match your criteria: "The Center for Peace Hiroshima University[Affiliation]"
Effects of internal exposure to neutron-activated 56MnO2 powder on locomotor activity in rats.
J Radiat Res
August 2022
The Center for Peace Hiroshima University, 730-0053, Hiroshima, Japan.
At the detonation of the atomic bombing in Hiroshima and Nagasaki, a significant amount of radionuclides was produced by the neutron induced activation. The residual radiation from the explosion is crucial to the health risk of the people who entered these cities after the bombing and might have inhaled these radioactive materials. Because 56Mn is one of the major radionuclides produced in soil and have not been studied until now, we had conducted a series of experiments using rats to investigate the biological impacts of exposure of 56MnO2 particles.
View Article and Find Full Text PDFEstimation of 'dose-depth' profile in the surface layers of a quartz-containing tile from the former Hiroshima University building indicates the possible presence of beta-irradiation from residual radioactivity after A-bombing.
J Radiat Res
August 2022
Research Institute for Radiation Biology and Medicine Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
The problem of differentiating between primary irradiation and exposure due to residual radioactivity following A-bombing (including beta-exposure), is the subject of special attention and discussions in order to understand the health effects following the Hiroshima and Nagasaki A-bombings, especially among newcomers to cities soon after the detonations. In this work, the method of single quartz grain luminescence retrospective dosimetry was applied for a retrospective estimation of the 'dose-depth' profile in a quartz-containing tile extracted from the building of former Hiroshima University (HU), which was a 'witness' of the Hiroshima atomic bombing on the 6 August 1945. It has been shown that results of retrospective estimates of the 'dose-depth' profile using the method of optically stimulated luminescence (OSL) from inclusions of quartz grains in very thin layers of the sample, in combination with the calculations of the 'dose-depth' profile using the Monte Carlo method, indicates the possible presence of beta irradiation of thin layers of the sample located near the surface of the tile facing the air, where there is no electronic equilibrium from gamma radiation.
View Article and Find Full Text PDFMicrodistribution of internal radiation dose in biological tissues exposed to 56Mn dioxide microparticles.
J Radiat Res
August 2022
Research Institute for Radiation Biology and Medicine Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
Article Synopsis
- Manganese-56 was a significant neutron-activated radionuclide released during the atomic bombings, contributing to radiation exposure in nearby areas.
- The study focused on the spatial microdistribution of radiation doses in lung tissues exposed to 56Mn, highlighting the potential for elevated irradiation of alveoli and ducts.
- Using the Monte Carlo simulation, researchers found a significant gradient in the absorbed dose in lung epithelial cells, indicating that low-energy electrons from 56Mn decay preferentially irradiate these cells.