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Adachi, Yasuhisa*; Kobayashi, Motoyoshi*; Feng, L.*; Tsujimoto, Yoko*; Yamashita, Yuji
Oreo Saiensu, 13(7), p.299 - 307, 2013/07
The electrical double layer is a well-known concept of a charged surface in an electrolyte solution. In the present article, we go back to the original history of electrokinetics to note how the concept has been established. In the first approximation, we pay attention to one dimensional plate model and discuss on the effectiveness of the DLVO theory in relation to the stability of colloidal dispersion. It is already about seventy years from the proposal of the DLVO theory and its effectiveness has been discussed in many respects. Nevertheless, there still exist unanswered important questions on the flocculation of charged colloids moving with diffusive electrical double layer. In terms of history and progress in technology, an approach using fluid mechanics will be essentially important in future.
Kikuchi, Kenji; Nakamura, Hirofumi; Tsujimoto, Kazufumi; Kobayashi, Kazuhiro; Yokoyama, Sumi; Saito, Shigeru; Yamanishi, Toshihiko
Journal of Nuclear Materials, 356(1-3), p.157 - 161, 2006/09
Times Cited Count：5 Percentile：36.24(Materials Science, Multidisciplinary)A high-energy proton of 580MeV at SINQ target generates almost all constituents through spallation process with hydrogen and helium gases. For the SINQ target hydrogen and helium are generated to hundreds appm H and tens appm He, respectively. However, tritium gas production has not been yet reported. Evaluation of tritium gas generation in the specimens of target 3 was done by calculation. Results were compared with gamma spectrum measurement. Residual tritium measurement was carried by the thermal desorption method. It is found that a release of tritium began over 250
C and material included 4 MBq/g. The ratio of residual tritium to generated one is estimated to be less than 20%.
Yamazaki, Hideo*; Bessho, Keisuke*; Nishida, Hironori*; Yoshikawa, Shusaku*; Murakami, Akiko*; Tsujimoto, Akira*; Fujiki, Toshiyuki*; Kokubu, Yoko; Magara, Masaaki; Nagaoka, Shinji*
no journal, ,
no abstracts in English
Kokubu, Yoko; Magara, Masaaki; Usuda, Shigekazu; Shinohara, Nobuo; Yamazaki, Hideo*; Yoshikawa, Shusaku*; Murakami, Akiko*; Tsujimoto, Akira*; Nagaoka, Shinji*
no journal, ,
Depth profiles of concentration of 
Pu and 
Pu/
Pu ratio in the cores collected from the center of the Nagasaki Bay were determined to find depositional records of plutonium released from Nagasaki atomic bomb and other nuclear tests. The ratio in sediment at the depth of about 50 cm was higher than that of the global stratospheric fallout, which might show that the plutonium has come from the nuclear tests carried out around the Marshall Islands. Deposition of plutonium from the Nagasaki atomic bomb will be also reported in the presentation.
Yamazaki, Hideo*; Kawashima, Asami*; Kokubu, Yoko; Nagaoka, Shinji*; Tsujimoto, Akira*; Murakami, Akiko*; Yoshikawa, Shusaku*
no journal, ,
no abstracts in English
