著者
櫻井 典夫
巻号頁・発行日
2014-12-25

北海道大学. 博士(文学)
出版者
保育社
巻号頁・発行日
vol.第14巻, 1970
著者
藤淵 俊王 藤田 克也 五十嵐 隆元 西丸 英治 堀田 昇吾 桜井 礼子 小野 孝二
出版者
公益社団法人 日本放射線技術学会
雑誌
日本放射線技術学会雑誌 (ISSN:03694305)
巻号頁・発行日
vol.77, no.2, pp.160-171, 2021 (Released:2021-02-20)
参考文献数
21
被引用文献数
2

Purpose: To investigate the actual condition of the crystalline lens equivalent dose and effective dose according to the type of job and the type of duties in a medical institution. We also sought to clarify effective exposure reduction strategies. Methods: Equivalent crystalline lens doses, effective doses, job type, and duties for 8656 persons · year were obtained from 17 medical facilities. We analyzed the relationship between the effective dose and the crystalline lens equivalent dose in uniform exposure control and non-uniform exposure control conditions. Exposure data were obtained for 13 unique job types and duties. Results: The ratio of the lens equivalent dose to the effective dose of non-uniform exposure managers was 2 to 6 times and varied depending on the occupation. The percentage of persons whose annual lens equivalent dose exceeded 20 mSv was 4.75% for medical doctors, 1.17% for nurses, and 0.24% for radiological technologists. Highly exposed tasks included doctors in cardiology and gastroenterology performing angiography and endoscopy, nurses in endoscopy, and radiological technologists in radiography and CT examinations. Conclusion: Thorough unequal exposure control for operations with high crystalline lens exposure, radiation protection education, and effective use of proper personal protective equipment such as the use of radiation protection glasses may reduce lens exposure levels.
著者
Noguchi Daisuke
出版者
AI Publications
雑誌
International Journal of Chemistry, Mathematics and Physics (ISSN:2456866X)
巻号頁・発行日
vol.6, no.3, pp.18-27, 2022-05-24

Generating checklists could provide new insights into the teaching strategies. Thus, the crystal struc-tures’ data of organic compounds learned in secondary chemical education were collected from the Cambridge Crystallographic Data Centre (CCDC) database. It has revealed that almost all the crystal data of these organic molecules are available, contrarily to an anticipation that liquid or gaseous ones at room temperature have few data. This index data would be fundamental for further studies hereafter.
著者
桑原実 等編
出版者
岩崎書店
巻号頁・発行日
1961

くらしの絵や空想画,物語の絵,等の鑑賞を作品写真(含原色刷)を示して解説。 (日本図書館協会)
著者
伊原宇三郎 著
出版者
国土社
巻号頁・発行日
1963

絵のこころとデッサン,水彩,油絵等の技術を名作や図解も入れ平易に教える。 (日本図書館協会)
著者
石川 奈緒 内田 滋夫 田上 恵子
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.56, no.9, pp.519-528, 2007-09-15 (Released:2011-03-01)
参考文献数
21
被引用文献数
28 17

放射性セシウム (137Cs, 半減期30年) は放射性廃棄処分や原子力事故の際の環境影響評価において重要な放射性核種である。本研究では, 日本各地から採取した30試料の水田土壌を用いて, 137Csの収着挙動に対する土壌特性の影響を検討した。各土壌試料の土壌-土壌溶液分配係数 (Kd) をバッチ収着実験から求めた。更に, 土壌へ固定される137Csの割合を得るため, 逐次抽出実験を行った。土壌特性として, pH, 陽イオン交換容量 (CEC) , 全炭素含量, 全窒素含量, 粘土含量を測定し, 更に, X線回折法を用いて, 土壌中の粘土鉱物の同定を行った。特に, Csを強く固定するイライトの含量を, 相対量として得た。全土壌について, 137CsのKd値は269~16 637L/kg (幾何平均2286L/kg) であった。Kd値と各土壌特性との相関をSpearmanの順位相関 (相関係数Rc) を用いて解析したところ, Kd値と相関を示したものは粘土含量のみ (Rc=0.55, p<0.005) であった。一方, 土壌への137Cs固定率は粘土含量より相対イライト含量と高い相関があった (Rc=0.68, p<0.001) 。以上の結果から, 土壌への137Cs固定率の推定には粘土含量ではなくイライト含量が非常に重要であることが示唆された。
著者
早川 洋一 瀧田 真平 菊池 一也 吉田 彩夏 小林 牧人
出版者
一般社団法人 日本魚類学会
雑誌
魚類学雑誌 (ISSN:00215090)
巻号頁・発行日
vol.59, no.2, pp.111-124, 2012-11-05 (Released:2014-12-02)
参考文献数
39
被引用文献数
2

The importance of olfaction in spawning of medaka Oryzias latipes was established for the first time by observation of spawning behavior by fish subjected to an olfactory blockage. Experimental fish were prepared by (1) covering the nostrils on both sides (bilateral treatment), thereby excluding all olfactory stimuli, and (2) covering nostrils on one side only (unilateral treatment), thereby giving partial exclusion. A control group comprised untreated (intact). Experiments conducted for both males (bilateral male-intact female, unilateral male-intact female and intact male-intact female) and females (bilateral female-intact male, unilateral female-intact male and intact female-intact male) resulted in no spawning by intact females paired with bilateral males, whereas spawning occurred in intact females paired with both unilateral and intact males. Spawning also occurred when intact males were paired with intact, unilateral or bilateral females, indicating that olfactory stimuli were necessary for males to complete spawning, but not so for females. Spawning acts exhibited from pairing started by bilateral males-intact female pairs included “following” (initial act of following female), “positioning” (lateral courtship display), and “quick circle” (turning in front of female), but they did not include “contact” (bodies in contact posteriorly prior to gamete release), “wrapping” (male embracing female using their dorsal and anal fins during gamete release). On the other hand, intact and unilateral males participated in all of the above spawning acts, indicating that olfactory stimuli are indispensable for behavior concerning emitting semen.

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著者
渡部温 編
出版者
渡辺温
巻号頁・発行日
vol.13, 1887