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Abstract  

The volatilization losses of mercury before, during and after neutron irradiation were studied. To minimize the losses, respectively, were added to the standards, thiourea, L-cysteine, thioacetamide and ammonium sulfide. It was possible to minimize the losses by preserving the standard at −20°C after irradiation. No loss was seen in the biological materials after irradiation.

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Journal of Radioanalytical and Nuclear Chemistry
Authors: Y. Yasuoka, T. Ishikawa, S. Tokonami, H. Takahashi, A. Sorimachi, and M. Shinogi

Abstract  

Room experiments were conducted to investigate the effects of an air cleaner on radon mitigation. Radon concentration, equilibrium equivalent radon concentration and unattached fraction were measured during the experiments. Two types of filtration were tested using the air cleaner which has a high efficiency particulate air filter (HEPA-filter) and a deodorizing activated carbon (carbon-filter). One is the filtration with the HEPA-filter plus carbon-filter and the other is the filtration with only the HEPA-filter. The effective doses from radon progeny were significantly decreased. Both filtration methods were effective for the mitigation of effective dose due to radon progeny.

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Journal of Radioanalytical and Nuclear Chemistry
Authors: S. Ohmori, H. Tsuji, Y. Kusaka, T. Takeuchi, T. Hayashi, J. Takada, M. Koyama, H. Kozuka, M. Shinogi, A. Aoki, K. Katayama, and T. Tomiyama

Abstract  

With the aim of indicating environmental pollution effects by heavy metals on humans using hair, nondestructive activation analysis was applied to 382 normal Japanese hair samples (background level). Elemental contents of hair could be determined for Ag, Al, As, Br, Ca, Cd, Cl, Co, Cr, Cu, Fe, Hg, I, K, La, Mg, Mn, Na, S, Sb, Sc, Se, Sm, Ti, V and Zn. As these elements in hair have wide concentration ranges, the differences in concentrations distribution between groups (sex, age, permanent treatment and regional difference) are discussed. A method for hair sampling is presented.

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