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Yildirim, A. C.*; Mei, H.*; Toda, Kanako*; Aoyagi, Noboru; Saito, Takumi*
Applied Clay Science, 274, p.107853_1 - 107853_9, 2025/09
Times Cited Count：0 Percentile：0.00(Chemistry, Physical)Guerinoni, E.*; Zemb, T.*; Motokawa, Ryuhei; Ueda, Yuki; Aoyagi, Noboru; Pellet-Rostaing, S.*; Dourdain, S.*
Journal of Physical Chemistry B, 129(32), p.8210 - 8217, 2025/08
Times Cited Count：1 Percentile：0.00(Biophysics)Mei, H.; Aoyagi, Noboru; Saito, Takumi*; Tanaka, Kazuya; Sugiura, Yuki; Tachi, Yukio
Applied Clay Science, 276, p.107944_1 - 107944_8, 2025/07
Times Cited Count：2 Percentile：56.59(Chemistry, Physical)Nagasawa, Makoto*; Shimizu, Yusuke*; Yamaguchi, Akiko; Tokunaga, Kohei; Mukai, Hiroki*; Aoyagi, Noboru; Mei, H.; Takahashi, Yoshio*
Chemical Geology, 670, p.122431_1 - 122431_25, 2024/12
Times Cited Count：8 Percentile：81.83(Geochemistry & Geophysics)
and Eu
onto coherent and melange-type pre-neogene sedimentary rocksHou, L.*; Toda, Kanako*; Mei, H.; Aoyagi, Noboru; Saito, Takumi*
Journal of Nuclear Science and Technology, 61(11), p.1488 - 1498, 2024/11
Times Cited Count：4 Percentile：73.33(Nuclear Science & Technology)Sugiura, Yuki; Ishidera, Takamitsu; Aoyagi, Noboru; Mei, H.; Saito, Takumi*; Tachi, Yukio
Applied Clay Science, 258, p.107476_1 - 107476_10, 2024/09
Times Cited Count：4 Percentile：36.12(Chemistry, Physical)Aoyagi, Noboru; Motokawa, Ryuhei; Okumura, Masahiko; Ueda, Yuki; Saito, Takumi*; Nishitsuji, Shotaro*; Taguchi, Tomitsugu*; Yomogida, Takumi; Sazaki, Gen*; Ikeda, Atsushi
Communications Chemistry (Internet), 7, p.128_1 - 128_13, 2024/06
Times Cited Count：2 Percentile：23.38(Chemistry, Multidisciplinary)Guerinoni, E.*; Giusti, F.*; Dourdain, S.*; Dufr
che, J.-F.*; Motokawa, Ryuhei; Ueda, Yuki; Aoyagi, Noboru; Zemb, T.*; Pellet-Rostaing, S.*
Journal of Molecular Liquids, 403, p.124820_1 - 124820_11, 2024/06
Times Cited Count：6 Percentile：67.09(Chemistry, Physical)Mei, H.; Aoyagi, Noboru; Saito, Takumi*; Tanaka, Kazuya; Sugiura, Yuki; Tachi, Yukio
Applied Geochemistry, 162, p.105926_1 - 105926_8, 2024/02
Times Cited Count：5 Percentile：48.22(Geochemistry & Geophysics)Liu, J.; Dotsuta, Yuma; Kitagaki, Toru; Aoyagi, Noboru; Mei, H.; Takano, Masahide; Kozai, Naofumi
Journal of Nuclear Science and Technology, 60(8), p.1002 - 1012, 2023/08
Times Cited Count：1 Percentile：14.77(Nuclear Science & Technology)Murota, Kento*; Aoyagi, Noboru; Mei, H.; Saito, Takumi*
Applied Geochemistry, 152, p.105620_1 - 105620_11, 2023/05
Times Cited Count：6 Percentile：53.87(Geochemistry & Geophysics)Massey, D.*; Williams, C. D.*; Mu, J.*; Masters, A. J.*; Motokawa, Ryuhei; Aoyagi, Noboru; Ueda, Yuki; Antonio, M. R.*
Journal of Physical Chemistry B, 127(9), p.2052 - 2065, 2023/03
Times Cited Count：3 Percentile：29.95(Biophysics)
/MgO] for prompt and efficient adsorption of ciprofloxacin from aqueous solutionsFalyouna, O.*; Bensaida, K.*; Maamoun, I.; Ashik, U. P. M.*; Tahara, Atsushi*; Tanaka, Kazuya; Aoyagi, Noboru; Sugihara, Yuji*; Eljamal, O.*
Journal of Cleaner Production, 342, p.130949_1 - 130949_15, 2022/03
Times Cited Count：78 Percentile：97.68(Green & Sustainable Science & Technology)Mei, H.; Aoyagi, Noboru; Saito, Takumi*; Kozai, Naofumi; Sugiura, Yuki; Tachi, Yukio
Applied Geochemistry, 136, p.105178_1 - 105178_8, 2022/01
Times Cited Count：23 Percentile：86.07(Geochemistry & Geophysics)
from nitrate media; Comparison with a conventional organic phosphateUeda, Yuki; Kikuchi, Kei*; Tokunaga, Kohei; Sugita, Tsuyoshi; Aoyagi, Noboru; Tanaka, Kazuya; Okamura, Hiroyuki
Solvent Extraction and Ion Exchange, 39(5-6), p.491 - 511, 2021/00
Times Cited Count：4 Percentile：15.99(Chemistry, Multidisciplinary)no abstracts in English
ssbauer, infrared, and laser-induced luminescence for classifying rare-earth minerals enriched in iron-rich depositsAoyagi, Noboru; Nguyen, T. T.*; Kumagai, Yuta; Nguyen, T. V.*; Nakada, Masami; Segawa, Yukari; Nguyen, H. T.*; Le, B. T.*
ACS Omega (Internet), 5(13), p.7096 - 7105, 2020/04
Times Cited Count：4 Percentile：13.57(Chemistry, Multidisciplinary)Oishi, Tomoji*; Kimura, Yu*; Nakajima, Kiyohiko*; Watanabe, Masayuki; Aoyagi, Noboru
Materials Sciences and Applications, 11(3), p.195 - 203, 2020/03
A high-efficiency synthesis method for a latent pigment of red pigment diketo-pyrrolo-pyrrole (Pig. Red 272:272DPP), which is important as a functional organic pigment, was investigated, and the investigation results revealed that irradiation of microwaves (MWs) for several seconds to 272 DPP in NMP (N-methyl-2-pyrrolidone) solvent yielded DPP latent pigment (272DPP-BOC) at a high yield of 86.2%. Two kinds of latent-pigment crystals, namely, red and yellow, were obtained by recrystallization, and it was found that the fluorescence-emission properties of the two kinds differ significantly. Single-crystal X-ray structural analysis showed that the difference in the fluorescence-emission properties of the two types is derived from the difference in their crystal structures.
-CO
ternary complex from brackish potable groundwater; Complex dissociation, transport, and sorptionMa, J.*; Zhang, Y.*; Collins, R. N.*; Tsarev, S.*; Aoyagi, Noboru; Kinsela, A. S.*; Jones, A. M.*; Waite, T. D.*
Environmental Science & Technology, 53(5), p.2739 - 2747, 2019/03
Times Cited Count：68 Percentile：89.26(Engineering, Environmental)Aoyagi, Noboru; Palladino, G.*; Nagasaki, Shinya*; Kimura, Takaumi
Bulletin of the Chemical Society of Japan, 91(6), p.882 - 890, 2018/06
Times Cited Count：3 Percentile：9.78(Chemistry, Multidisciplinary)The speciation and coordination geometries of M(III)-citrate complexes in aqueous solutions, where M denotes Eu, Tb, Lu, or Cm, are studied using potentiometric titration, nuclear magnetic resonance spectroscopies. Their photophysical properties are also characterized by time-resolved fluorescence spectra. The formation constants of mononuclear, dinuclear, and trinuclear Lu-citrate species were determined by potentiometric titration in 3.00 M NaClO
aqueous media. Terminal carboxylic conformation in trinuclear complexes comprised both the five- and six-membered rings at different exchanging rates. Hydration states evaluated for Eu ions are the chemical formula of [Eu(Cit) (H O)
]
and [Eu(OH)(Cit)(HO)
]
. These complexes in aqueous solution have geometrical similarity to the crystal structures in the literature. Furthermore, the entity of the hetero-trinuclear complex induces the intramolecular energy transfer from Tb to Eu. The incorporation of Cm into these homo/hetero-trinuclear citrate complexes proved to be a successful trial to probe the formation of actinide polymer at a trace level.
Saito, Takumi*; Aoyagi, Noboru; Terashima, Motoki
Journal of Nuclear Science and Technology, 54(4), p.444 - 451, 2017/04
Times Cited Count：7 Percentile：48.75(Nuclear Science & Technology)Humic substances (HSs) are ubiquitous in various environments including deep underground and play an important role in the speciation and mobility of radionuclides. The binding of Eu, a chemical homologue of trivalent actinide ions, to HSs isolated from sedimentary groundwater at -250 m below the surface was studied by time-resolved laser fluorescence spectroscopy combined with parallel factor analysis (PARAFAC) as a function of pH and salt concentration. PARAFAC modeling reveals the presence of multiple factors that corresponds to different Eu species. These factors resemble those observed for Eu binding to HSs from surface environments; however, detailed comparison shows that there are some particularities in Eu binding to the deep groundwater HSs. The distribution coefficients (
) of Eu binding to the HSs calculated from the PARAFAC modeling exhibits a rather strong salt effect. At 0.01 M NaClO the values are relatively large and comparable to those to the surface HSs; they are decreaed at 0.1 M NaClO by more than an order of the magnitude. The values are larger for humic acid fraction of the deep underground HSs than fulvic acid over the entire range of pH and salt concentration investigated in this study.
