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Takahashi, Yoshio*; Fan, Q.*; Suga, Hiroki*; Tanaka, Kazuya; Sakaguchi, Aya*; Takeichi, Yasuo*; Ono, Kanta*; Mase, Kazuhiko*; Kato, Kenji*; Kanivets, V. V.*
Scientific Reports (Internet), 7(1), p.12407_1 - 12407_11, 2017/09
Times Cited Count：28 Percentile：67.08(Multidisciplinary Sciences)We focused on factors controlling partition of radiocesium on particulate matters and sediments in rivers of Fukushima and Chernobyl. Radiocesium is more soluble in the Pripyat River (Chernobyl) due to weaker interaction of radiocesium with clay minerals caused by the inhibition effect of the adsorbed humic substances. In contrast, particulate matters and sediments in the Kuchibuto River (Fukushima) display high adsorption affinity with lesser inhibition effect of adsorbed humic substances. This difference is possibly governed by the geology and soil type of provenances surrounding both catchments.
Onuki, Toshihiko; Kozai, Naofumi; Sakamoto, Fuminori; Utsunomiya, Satoshi*; Kato, Kenji*
Chemistry Letters, 46(5), p.771 - 774, 2017/05
Times Cited Count：0 Percentile：0(Chemistry, Multidisciplinary)The sorption behavior of Np(V) by the microbe consortia and by a single pure culture of Fe reducing bacterium was studied at pH between 3 and 7 in resting cell conditions. The sorption of Np(V) by the Fe reducing bacterium obtained in the inert condition and by the consortia in aerated condition were higher than by the Fe reducing bacterium in aerobic condition at pH below 5, strongly suggesting presence of other mechanism than the adsorption on microbial cell surface, i.e. reduction to Np(IV).
Katsuyama, Chie*; Nashimoto, Hiroaki*; Nagaosa, Kazuyo*; Ishibashi, Tomotaka*; Furuta, Kazuki*; Kinoshita, Takeshi*; Yoshikawa, Hideki; Aoki, Kazuhiro; Asano, Takahiro*; Sasaki, Yoshito; et al.
FEMS Microbiology Ecology, 86(3), p.532 - 543, 2013/12
Times Cited Count：14 Percentile：36.72(Microbiology)Anaerobic microbial activity has a major influence on the subsurface environment, and should be considered in subsurface activities including the construction of radioactive waste repositories. We investigated denitrification and methanogenesis in anoxic groundwater from 140 m depth in two boreholes, where the redox potential fluctuated. The average maximum potential denitrification rates, measured under anaerobic conditions in the two boreholes using an 
N tracer. Methanogenesis candidates were detected by 16S rRNA gene analysis. Although the stable isotope signatures suggested that some of the dissolved methane was of biogenic origin, no potential for methane production was evident during the incubations. The groundwater at 140 m depth did not contain oxygen, had an Eh ranging from -144 to 6.8 mV, and was found to be a potential field for denitrification.
Cd knight shift in superconducting Cd
ReO
; Evidence for spin-singlet pairingSakai, Hironori; Tokunaga, Yo; Kambe, Shinsaku; Kitagawa, Kentaro*; Murakawa, Hiroshi*; Ishida, Kenji*; Ono, Hiroyuki*; Kato, Masaki*; Yoshimura, Kazuyoshi*; Walstedt, R. E.
Journal of the Physical Society of Japan, 73(11), p.2940 - 2943, 2004/11
Times Cited Count：8 Percentile：48.29(Physics, Multidisciplinary)Cd NMR measurements have been performed in the superconducting (SC) state of the pyrochlore CdReO at T
1 K, and in a field of less than 3 kOe below 
. The upper critical field at 0.1 K has been determined to be 4 kOe from in situ measurements of the ac susceptibility. A reduction of the Knight shift in the SC state is confirmed. The present results provide strong evidence that this compound has a singlet SC pairing symmetry.
Asano, Takahiro; Sasaki, Yoshito; Nagaosa, Kazuyo*; Kato, Kenji*; Yoshikawa, Hideki
no journal, ,
no abstracts in English
Nagaosa, Kazuyo*; Asano, Takahiro; Sasaki, Yoshito; Yoshikawa, Hideki; Kato, Kenji*
no journal, ,
no abstracts in English
Kato, Kenji*; Nagaosa, Kazuyo*; Tsunogai, Urumu*; Asano, Takahiro; Sasaki, Yoshito; Yoshikawa, Hideki
no journal, ,
no abstracts in English
Ishibashi, Tomotaka*; Nagaosa, Kazuyo*; Katsuyama, Chie*; Nashimoto, Hiroaki*; Asano, Takahiro; Sasaki, Yoshito; Iwatsuki, Teruki; Yoshikawa, Hideki; Kato, Kenji*
no journal, ,
no abstracts in English
Katsuyama, Chie*; Nashimoto, Hiroaki*; Ishibashi, Tomotaka*; Furuta, Kazuki*; Nagaosa, Kazuyo*; Yoshikawa, Hideki; Asano, Takahiro; Sasaki, Yoshito; Aoki, Kazuhiro; Suwa, Yuichi*; et al.
no journal, ,
no abstracts in English
Nashimoto, Hiroaki*; Nagaosa, Kazuyo*; Katsuyama, Chie*; Tsunogai, Urumu*; Yoshikawa, Hideki; Asano, Takahiro; Sasaki, Yoshito; Aoki, Kazuhiro; Kato, Kenji*
no journal, ,
no abstracts in English
-elements on microbial cell surfaceOnuki, Toshihiko; Jiang, M.*; Utsunomiya, Satoshi*; Kozai, Naofumi; Kato, Kenji*
no journal, ,
Biogenic nano-particles were formed on the cells surface of microorganisms. SEM and TEM analyses showed that REE-phosphate nano-particles less than 100 nm in diameter were developed directly from the cells surface, even though no P ion was added in the solution. In contrast, REE-phosphate precipitates more than 0.001 mm was formed in the solution without microorganisms. Thus, the adsorbed REE was reacted with the released P from inside cells, resulting nano particles formation on the cells surface.
