著者

湊 進

出版者

Tokyo Geographical Society

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.115, no.1, pp.87-95, 2006-02-25 (Released:2009-11-12)

参考文献数

55

被引用文献数

21 23

---

Nationwide in-situ measurements of terrestrial gamma ray dose rates have been carried out using a scintillation counter. A database of over 4300 entries has been compiled by adding data taken from literature to the data collected by the mentioned survey. A contour map of dose rates in Japan calculated from the database is presented along with a table of dose rates for each bedrock type.

著者

松田 秀晴 湊 進

出版者

公益社団法人 日本アイソトープ協会

雑誌

RADIOISOTOPES (ISSN:00338303)

巻号頁・発行日

vol.44, no.11, pp.789-793, 1995-11-15 (Released:2010-07-21)

参考文献数

5

被引用文献数

2 2

著者

高橋 総司 多村 幸之進 長江 逸郎 野牛 道晃 田辺 好英 湊 進太朗 青木 達哉 小柳 〓久

出版者

特定非営利活動法人 日本小児外科学会

雑誌

日本小児外科学会雑誌 (ISSN:0288609X)

巻号頁・発行日

vol.39, no.5, pp.658-661, 2003

被引用文献数

4

---

低位鎖肛を合併したhuman tailの1例を経験した.妊娠経過に異常は指摘されなかった,在胎40週5日,自然分娩にて出生の女児で,出生体重3,060gであった.出生時より腕前底部に肛門痩を認める低位鎖肛および仙尾部腫瘤を認めた.腫瘤は臀部正中背側に存在し5×3×2cm大と1cm大の結節が雪だるま状を呈していた.腕前底部には肛門瘻を認めた.洗腸にて排便コントロールをはかり,生後4ヵ月時,仙尾部腫瘤切除術と仙骨会陰式肛門形成術を施行した.腫瘤は脂肪組織のみで構成されhuman tailと考えられた.本症例は,human tailを合併していたため低位鎖肛にたいし仙骨会陰式肛門形成術を施行し良好な結果を得た.human tailでは脊髄や肛門の合併奇形を伴う可能性が大きく術前の詳細な検討が必要と思われる.

著者

松田 秀晴 深谷 光春 湊 進

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.25, no.4, pp.385-390, 1990 (Released:2010-02-25)

参考文献数

9

被引用文献数

2 5

---

Natural gamma-ray and cosmic-ray exposure rates were measured indoors and outdoors for 94 model houses of four housing centers in Nagoya to obtain basic data for estimation of the population dose. Influence of the structure of houses on indoor exposure rates and relationship between indoor and outdoor natural gamma-ray exposure rates were studied. Exposure rates were measured with a 1.5″φ×4″ NaI (Tl) scintillation counter and a 6″φ spherical plastic scintillation counter.The mean indoor natural gamma-ray exposure rate in ferro-concrete buildings was about 40% higher than that in fireproof wooden houses, about 60% higher than that in light-weight steel-framed buildings, in fireproof wooden houses, it was also about 10% higher than in light-weight steel-framed building.The ratio of indoor to outdoor natural gamma-ray exposure rate was found to be about 0.95±0.15, 0.77±0.10, and 0.72±0.13 for ferro-concrete buildings, fireproof wooden houses and light-weight steel-framed buildings, respectively.The mean indoor cosmic-ray exposure rate in ferro-concrete buildings was 2.8μR/h, about 18% lower than the outdoors. The indoor cosmic-ray exposure rate in fireproof wooden houses and light-weight steel-framed buildings were 3.2μR/h, about 6% lower than the outdoors.

著者

吉岡 勝廣 湊 進

出版者

公益社団法人 日本アイソトープ協会

雑誌

RADIOISOTOPES (ISSN:00338303)

巻号頁・発行日

vol.53, no.7, pp.427-433, 2004-07-15 (Released:2011-03-01)

参考文献数

14

被引用文献数

3 3

---

To study the relation between the terrestrial γ-ray dose rate and subsurface geology, the γ-ray dose rate has been surveyed at 213 points in Okinoshima, an island situated in the Japan Sea, with a γ-ray survey meter. The results of this observation are the mean value of terrestrial γ-ray dose rate at 213 points = 57.1 nGyh-1, the standard deviation =15.2 nGyh-1, the maximum value =107.2 nGyh-1, and the minimum value=23.1 nGyh-1. On the soil of the basement rock in Okinoshima, the terrestrial γ-ray dose rate of Oki-gneiss is 72±15 nGyh-1, which is about 1.6 times as big as the reported value for metamorphic rock and others are the same in the literatures. It is considered that the terrestrial γ-ray dose rate of Okigneiss has been more strongly affected by the granitic magma which has been interpenetrated in the process of this formation. In Okinoshima, it is suggested that the geological features of the basement rock remain in the surface soil, due to a good correspondence between the geographical distribution of terrestrial γ-ray dose rate and the subsurface geology. And then, in the relation between the terrestrial γ-ray dose rate and the atmospheric 222Rn concentration, the magnitude of 222Rn concentration is smaller than this of place on large land area. Because of a small land area in Okinoshima, this is caused that the land air is mixed with the sea air by the advection for a long time except the time from the sunset to around the midnight. It is suggested that the time and space change characteristic of the diffusion and mixture process is different in contrast to a place of large land area.