量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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The health effects of low dose radiation is the most important subject in the field of radiation biology now. In the south of China there is a high background radiation area (HBRA) where the level of environmental natural radiation is about 3 to 5 times higher than that in a control area (CA). Major sources of higher background radiation in this area are nuclides of Th-232 and U-238 decay products in the soil and in the building materials. An epidemiological study conducted in HBRA and control area showed no statistically significant increase in either cancer morbidity or mortality. On the other hand, frequency of dicentrics plus rings, which are known to be radiation specific chromosome aberrations, in the lymphocytes of the residents in HBRA was higher than that in CA. Study of translocations could not detect difference in the frequencies between those two areas.
In the present paper we describe the results of the study on the effect of smoking on chromosomes compared with that of radiation in those areas.
会議概要（会議名, 開催地, 会期, 主催者等）
International Workshop on High Background Radiation Area (HBRA) Studies in China, India, and Iran 中国、インド、イランの高自然放射線地域研究国際ワークショップ
Effect of Smoking on Chromosomes Compared with That of Radiation in the Residents of High Background Radiation Area in China
