著者

河野 貴美子 櫛田 浩平

出版者

国際生命情報科学会

雑誌

Journal of International Society of Life Information Science (ISSN:13419226)

巻号頁・発行日

vol.14, no.1, pp.91-96, 1996-03-01

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強制的な瞑想誘導による脳への影響を調べるべく、通常は半眼・腹式長呼吸にて行う坐禅瞑想を、あえてアイマスク着用、強圧的呼吸負荷のもとに行った。目隠しにより、α波は増大し(脳活動抑制)、後頭から前頭にかけ、全汎性に出現した。後頭-前頭間のα波lag time (τm)は、目隠しと共に強圧的な呼吸負荷により、長くなる傾向が見られ、一見深い瞑想を思わせた。α波の周波数は、強圧短息呼吸を続ける内、徐々に低くなった。これも曹洞禅などの、深い禅定に見られる傾向である。しかし、このとき眼球の激しい動きに伴うδからθ帯域に属する3〜5Hzの波が頻発し、極度な大脳抑制状態を強引に生み出す危険性を暗示していた。

著者

河野 貴美子 櫛田 浩平

出版者

人体科学会

雑誌

人体科学 (ISSN:09182489)

巻号頁・発行日

vol.5, no.1, pp.39-45, 1996-05-30

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Electroencephalograms (EEGs) during Japanese Zen-meditation (Zazen) and Chinese Qi-gong and also while training Japanese Archery on image were measured from one subject, who has been training Zen and archery for about 22 years and Qi-gong for about 10 years. The author, Kawano, has previously reported the differences of EEGs among Qi-gong and two types of Zazen, Soto and Rinzai. Those subjects had been different for each, therefore, the results could have been caused by the personal difference. However, the present data by one trainee gave almost similar results. The indicator of concentration, τm (alpha phase difference between O_1 and Fp_1, became smaller during Qi-gong and the concentrating type of meditation, like Rinzai. Alpha wave frequency became slower by the very quiet and deep meditation. The change in alpha wave power was a little, though, some differences were found in the ratios of the right to the left hemisphere (O_2/O_1) for each task. Japanese archery was the task which needed the deepest concentration and full of images.

著者

櫛田 浩平 安藤 麻里子 天野 光

出版者

公益社団法人 日本分析化学会

雑誌

分析化学 (ISSN:05251931)

巻号頁・発行日

vol.63, no.11, pp.867-871, 2014-11-05 (Released:2014-12-05)

参考文献数

19

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Gold is useful not only for traditional, ordinary human applications as ornaments, coins or electric devices, but also for nuclear and radiation applications. Here we report a study of activated gold for estimating the neutron dose in the environment in the case of the JCO criticality accident that occurred in Tokai, Japan, in 1999. We collected and analyzed 16 gold samples, such as rings, coins or necklaces stored at residents’ houses located in the range of 168 to 568 m from the accident site of the JCO. They indicated activities of gold from 91.9 to 0.322 Bq g−1 as standardized values at 06 : 15 on October 1, 1999, when the criticality reaction had ceased after 20 hours of continuation. The induced radioactivity of gold samples showed a good correlation as a power function of distance. The induced radioactivity of gold is discussed with the reference data in order to estimate dose equivalent in the environment around the JCO. This paper gives an example showing the usefulness of gold in the field of nuclear and radiation studies and applications.