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Yamasaki, Seiko; Yamada, Kunimi; Umeda, Koji; Hanamuro, Takahiro; Tagami, Takahiro*
no journal, ,
no abstracts in English
Nanjo, Isao; Amano, Yuki; Iwatsuki, Teruki; Murakami, Hiroaki; Sasaki, Yoshito; Yoshikawa, Hideki
no journal, ,
The instrument for groundwater monitoring technique, which can continuously monitor the pore water pressure and physico-chemical parameters(pH, EC, DO, ORP, temp) has developed, to monitor the hydrological and geochemical disturbances caused by underground facility construction. It was able to be confirmed that the pore water pressure decrease in all the observation zone by underground facility construction. The relation between spring water and pore water pressure, physico-chemical parameters will be examined by a consecutive observation.
Yamamoto, Yuhei; Aosai, Daisuke; Mizuno, Takashi
no journal, ,
no abstracts in English
Fukunaga, Sakae*; Miyasaka, Iku*; Yoshikawa, Hideki
no journal, ,
no abstracts in English
Shimamoto, Yoko*; Takahashi, Yoshio*; Amano, Yuki; Matsuzaki, Hiroyuki*; Muramatsu, Yasuyuki*; Iwatsuki, Teruki
no journal, ,
Study of migration of iodine in the subsurface environment is important for natural analogue of HLW. The vertical distribution of iodine concentration, the type of iodine, and isotope were analyzed for the sample of groundwater and sedimentary rocks of the Horonobe area. The results showed that iodine ion were existed in the groundwater, and the mixed iodine with organic and inorganic type were existed in the rock samples.
Sakamoto, Ai; Tanaka, Takayuki; Otosaka, Shigeyoshi
no journal, ,
In this study, to resolve the behavior of DOM and the generation mechanism of the refractory DOM in the Kuji estuary, Ibaraki, we address the temporal variations of some different factors affecting estuarine DOM flux at both the field observation and the quasi-field observation. The seasonal change of DOC concentration ranged from 1.0 
0.1 mgC/L (average s.d. (this "s.d." means daily variation)) in December 2009 to 1.9 0.2 mgC/L in June 2010. From the results of the quasi-field observation, we showed the amount of change on DOC concentration concerned with each variable factor (x) as delta-DOCx. Applying these results of quasi-field observation to the field one, we found that the variation of DOC concentration was greatly governed by not only the phytoplankton biological effect but also the physical effect which indirectly led, such as the elution from the sediment resuspention. These contribution ratio of each variation for the time-series were more than 50%.
Kozai, Naofumi; Jiang, M.; Utsunomiya, Satoshi*; Kuwabata, Susumu*; Onuki, Toshihiko
no journal, ,
We have observed biogenic nano-particles developed on cell surface of microorganism coated with ionic liquid by SEM. In the sample preparation, the microbial cells were coated with hydrophilic and hydrophobic ionic liquids. The biogenic nano-particles were clearly observed by SEM, when the sample were coated with hydrophilic ionic liquid. On the contrary, the cells were collapsed during SEM observation, when the sample were coated with hydrophobic ionic liquid. These results showed that the coating with hydrophilic ionic liquid is effective for analyzing nano-particles developed on microbial cell surface by SEM.
Tanaka, Kazuya; Suzuki, Yoshinori*; Jiang, M.*; Utsunomiya, Satoshi*; Onuki, Toshihiko
no journal, ,
no abstracts in English