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Last Update: 15-March-2024  

PUBLICATION

 

Peer-Reviewed Papers


  • Sugahara, H., Yoshimura, T., Tamenori, Y., Takano, Y., Ogawa, N.O., Chikaraishi, Y., and Ohkouchi, N. (2024) Nitrogen K-edge X-ray adsorption near-edge structure spectroscopy of chemically adsorbed ammonia gas on clay minerals and the 15N/14N-nitrogen isotopic fractionation. Analytical Sciences, in press. doi:10.1007/s44211-023-00503-5. [Open Access]
  • Fukai, R., Usui, T., Fujiya, W., Takano, Y., Bajo, K.-i., Beck, A., Bonato, E., Chabot, N.L., Furukawa, Y., Genda, H., Hibiya, Y., Jourdan, F., Kleine, T., Koike, M., Matsuoka, M., Miura, Y.N., Moynier, F., Okazaki, R., Russell, S.S., Sumino, H., Zolensky, M.E., Sugahara, H., Tachibana, S., Sakamoto, K., Abe, M., Cho, Y., and Kuramoto, K. (2024) Curation protocol of Phobos sample returned by Martian Moons eXploration. Meteoritics & Planetary Science, 59(2), 321-337. doi:10.1111/maps.14121. [Open Access]
  • Zeichner, S.S., Aponte, J.C., Bhattacharjee, S., Dong, G., Hofmann, A.E., Dworkin, J.P., Glavin, D.P., Elsila, J.E., Graham, H.V., Naraoka, H., Takano, Y., Tachibana, S., Karp, A.T., Grice, K., Holman, A.I., Freeman, K.H., Yurimoto, H., Nakamura, T., Noguchi, T., Okazaki, R., Yabuta, H., Sakamoto, K., Yada, T., Nishimura, M., Nakato, A., Miyazaki, A., Yogata, K., Abe, M., Okada, T., Usui, T., Yoshikawa, M., Saiki, T., Tanaka, S., Terui, F., Nakazawa, S., Watanabe, S.-i., Tsuda, Y., Hamase, K., Fukushima, K., Aoki, S., Hashiguchi, M., Mita, H., Chikaraishi, Y., Ohkouchi, N., Ogawa, N.O., Sakai, S., Parker, E.T., McLain, H.L., Orthous-Daunay, F.-R., Vuitton, V., Wolters, C., Schmitt-Kopplin, P., Hertkorn, N., Thissen, R., Ruf, A., Isa, J., Oba, Y., Koga, T., Yoshimura, T., Araoka, D., Sugahara, H., Furusho, A., Furukawa, Y., Aoki, J., Kano, K., Nomura, S.-i.M., Sasaki, K., Sato, H., Yoshikawa, T., Tanaka, S., Morita, M., Onose, M., Kabashima, F., Fujishima, K., Yamazaki, T., Kimura, Y., and Eiler, J.M. (2023) Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium. Science, 382(6677), 1411-1416. doi:10.1126/science.adg6304. [Abstract]
  • Glavin, D.P., Eckley, S.A., Aponte, J.C., Berger, E.L., Burton, A.S., Dworkin, J.P., Elsila, J.E., Ferguson, F.T., Furukawa, Y., Graham, H.V., Koga, T., Liss, M., McLain, H.L., Naraoka, H., Oba, Y., Parker, E.T., Righter, K., Schmitt-Kopplin, P., Simkus, D.N., Takano, Y., Connolly, H.C.Jr., and Lauretta, D.S. (2023) Investigating the impact of x-ray computed tomography imaging on soluble organic matter in the Murchison meteorite: Implications for Bennu sample analyses. Meteoritics & Planetary Science, in press. doi:10.1111/maps.14111. [Open Access]
  • Yada,T., Abe, M., Nishimura, M., Sawada, H., Okazaki, R., Takano, Y., Sakamoto, K., Okada, T., Nakato, A., Yoshitake, M., Nakano, Y., Yogata, K., Miyazaki, A., Furuya, S., Iwamae, A.S., Nakatsubo, S., Hatakeda, K., Hitomi, Y., Kumagai, K., Suzuki, S., Miura, Y.N., Ito, M., Tomioka, N., Uesugi, M., Karouji, Y., Uesugi, K., Shirai, N., Yamaguchi, A., Imae, N., Naraoka, H., Yamamoto, Y., Tachibana, S., Yurimoto, H., and Usui, T. (2023) A curation for uncontaminated Hayabusa2-returned samples in the extraterrestrial curation center of JAXA: from the beginning to present day. Earth, Planets and Space, 75:170. doi:10.1186/s40623-023-01924-2. [Open Access]
  • Schmitt-Kopplin, P., Hertkorn, N., Harir, M., Moritz, F., Lucio, M., Bonal, L., Quirico, E., Takano, Y., Dworkin, J.P., Naraoka, H., Tachibana, S., Nakamura, T., Noguchi, T., Okazaki, R., Yabuta, H., Yurimoto, H., Sakamoto, K., Yada, T., Nishimura, M., Nakato, A., Miyazaki, A., Yogata, K., Abe, M., Usui, T., Yoshikawa, M., Saiki, T., Tanaka, S., Terui, F., Nakazawa, S., Okada, T., Watanabe, S.-i., Tsuda, Y., and Hayabusa2-initial-analysis SOM team. (2023) Soluble organic matter Molecular atlas of Ryugu reveals cold hydrothermalism on C-type asteroid parent body. Nature Communications, 14, 6525. doi:10.1038/s41467-023-42075-y. [Open Access]
  • Koga, T., Takano, Y., Oba, Y., Naraoka, H., and Ohkouchi, N. (2024) Abundant extraterrestrial purine nucleobases in the Murchison meteorite: Implications for a unified mechanism for purine synthesis in carbonaceous chondrite parent bodies. Geochimica et Cosmochimica Acta, 365, 253-265. doi:10.1016/j.gca.2023.10.024. [Abstract]
  • Yoshimura, T., Takano, Y., Naraoka, H., Koga, T., Araoka, D., Ogawa, N.O., Schmitt-Kopplin, P., Hertkorn, N., Oba, Y., Dworkin, J.P., Aponte, J.C., Yoshikawa, T., Tanaka, S., Ohkouchi, N., Hashiguchi, M., McLain, H., Parker, E.T., Sakai, S., Yamaguchi, M., Suzuki, T., Yokoyama, T., Yurimoto, H., Nakamura, T., Noguchi, T., Okazaki, R., Yabuta, H., Sakamoto, S., Yada, T., Nishimura, M., Nakato, A., Miyazaki, A., Yogata, K., Abe, M., Okada, T., Usui, T., Yoshikawa, M., Saiki, T., Tanaka, S., Terui, F., Nakazawa, S., Watanabe, S.-i., Tsuda, Y., Tachibana, S., and Hayabusa2-initial-analysis SOM team. (2023) Chemical evolution of primordial salts and organic sulfur molecules in the asteroid 162173 Ryugu. Nature Communications, 14: 5284. doi:10.1038/s41467-023-40871-0. [Open Access]
  • Sun, Y., Ogawa, N.O., Ishikawa, N.F., Blattmann, T.M., Takano, Y., and Ohkouchi, N. (2023) Application of a porous graphitic carbon column to carbon and nitrogen isotope analysis of underivatized individual amino acids using high-performance liquid chromatography coupled with elemental analyzer/isotope ratio mass spectrometry. Rapid Communications in Mass Spectrometry, 37(17), e9602. doi:10.1002/rcm.9602. [Open Access]
  • Oba, Y., Takano, Y., Dworkin, J.P., and Naraoka, H. (2023) Ryugu asteroid sample return provides a natural laboratory for primordial chemical evolution. Nature Communications, 14: 3107. doi:10.1038/s41467-023-38518-1. [Open Access]
  • Hashiguchi, M., Aoki, D., Fukushima, K., Naraoka, H., Takano, Y., Dworkin, J.P., Dworkin, K.E., Aponte, J.C., Elsila, J.E., Eiler, J.M., Furukawa, Y., Furusho, A., Glavin, D.P., Graham, H.V., Hamase, K., Hertkorn, N., Isa, J., Koga, T., McLain, H.L., Mita, H., Oba, Y., Ogawa, N.O., Ohkouchi, N., Orthous-Daunay, F.-R., Parker, E.T., Ruf, A., Sakai, S., Schmitt-Kopplin, P., Sugahara, H., Thissen, R., Vuitton, V., Wolters, C., Yoshimura, T., Yurimoto, H., Nakamura, T., Noguchi, T., Okazaki, R., Yabuta, H., Sakamoto, K., Tachibana, S., Yada, T., Nishimura, M., Nakato, A., Miyazaki, A., Yogata, K., Abe, M., Usui, T., Yoshikawa, M., Saiki, T., Tanaka, S., Terui, F., Nakazawa, S., Watanabe, S.-i., and Tsuda, Y. (2023) The spatial distribution of soluble organic matter and their relationship to minerals in the asteroid (162173) Ryugu. Earth, Planets and Space, 75: 73. doi:10.1186/s40623-023-01792-w. [Open Access]
  • Oba, Y., Koga, T., Takano, Y., Ogawa, N.O., Ohkouchi, N., Sasaki, K., Sato, H., Glavin, D.P., Dworkin, J.P., Naraoka, H., Tachibana, S., Yurimoto, H., Nakamura, T., Noguchi, T., Okazaki, R., Yabuta, H., Sakamoto, K., Yada, T., Nishimura, M., Nakato, A., Miyazaki, A., Yogata, K., Abe, M., Okada, T., Usui, T., Yoshikawa, M., Saiki, T., Tanaka, S., Terui, F., Nakazawa, S., Watanabe, S.-i., Tsuda, Y., and Hayabusa2-initial-analysis soluble organic matter team. (2023) Uracil in the carbonaceous asteroid (162173) Ryugu. Nature Communications, 14: 1292. doi:10.1038/s41467-023-36904-3. [Open Access]
  • Aponte, J.C., Dworkin, J.P., Glavin, D.P., Elsila, J.E., Parker, E.T., McLain, H.L., Naraoka, H., Okazaki, R., Takano, Y., Tachibana, S., Dong, G., Zeichner, S.S., Eiler, J.M., Yurimoto, H., Nakamura, T., Yabuta, H., Terui, F., Noguchi, T., Sakamoto, K., Yada, T., Nishimura, M., Nakato, A., Miyazaki, A., Yogata, K., Abe, M., Okada, T., Usui, T., Yoshikawa, M., Saiki, T., Tanaka, S., Nakazawa, S., Tsuda, Y., Watanabe, S.-i., The Hayabusa2-initial-analysis soluble organic matter team, and The Hayabusa2-initial-analysis core team. (2023) PAHs, hydrocarbons, and dimethylsulfides in Asteroid Ryugu samples A0106 and C0107 and the Orgueil (CI1) meteorite. Earth, Planets and Space, 75: 28. doi:10.1186/s40623-022-01758-4. [Open Access]
  • Parker, E.T., McLain, H.L., Glavin, D.P., Dworkin, J.P., Elsila, J.E., Aponte, J.C., Naraoka, H., Takano, Y., Tachibana, S., Yabuta, H., Yurimoto, H., Sakamoto, K., Yada, T., Nishimura, M., Nakato, A., Miyazaki, A., Yogata, K., Abe, M., Okada, T., Usui, T., Yoshikawa, M., Saiki, T., Tanaka, S., Nakazawa, S., Tsuda, Y., Terui, F., Noguchi, T., Okazaki, R., Watanabe, S.-i., and Nakamura, T. (2023) Extraterrestrial Amino Acids and Amines Identified in Asteroid Ryugu Samples Returned by the Hayabusa2 Mission. Geochimica et Cosmochimica Acta, 347, 42-57. doi:10.1016/j.gca.2023.02.017. [Abstract]
  • Naraoka, H., Takano, Y., Dworkin, J.P., Oba, Y., Hamase, K., Furusho, A., Ogawa, N.O., Hashiguchi, M., Fukushima, K., Aoki, D., Schmitt-Kopplin, P., Aponte, J.C., Parker, E.T., Glavin, D.P., McLain, H.L., Elsila, J.E., Graham, H.V., Eiler, J.M., Orthous-Daunay, F.-R., Wolters, C., Isa, J., Vuitton, V., Thissen, R., Sakai, S., Yoshimura, T., Koga, T., Ohkouchi, N., Chikaraishi, Y., Sugahara, H., Mita, H., Furukawa, Y., Hertkorn, N., Ruf, A., Yurimoto, H., Nakamura, T., Noguchi, T., Okazaki, R., Yabuta, H., Sakamoto, K., Tachibana, S., Connolly, H.C., Lauretta, D.S., Abe, M., Yada, T., Nishimura, M., Yogata, K., Nakato, A., Yoshitake, M., Suzuki, A., Miyazaki, A., Furuya, S., Hatakeda, K., Soejima, H., Hitomi, Y., Kumagai, K., Usui, T., Hayashi, T., Yamamoto, D., Fukai, R., Kitazato, K., Sugita, S., Namiki, N., Arakawa, M., Ikeda, H., Ishiguro, M., Hirata, N., Wada, K., Ishihara, Y., Noguchi, R., Morota, T., Sakatani, N., Matsumoto, K., Senshu, H., Honda, R., Tatsumi, E., Yokota, Y., Honda, C., Michikami, T., Matsuoka, M., Miura, A., Noda, H., Yamada, T., Yoshihara, K., Kawahara, K., Ozaki, M., Iijima, Y.-i., Yano, H., Hayakawa, M., Iwata, T., Tsukizaki, R., Sawada, H., Hosoda, S., Ogawa, K., Okamoto, C., Hirata, N., Shirai, K., Shimaki, Y., Yamada, M., Okada, T., Yamamoto, Y., Takeuchi, H., Fujii, A., Takei, Y., Yoshikawa, K., Mimasu, Y., Ono, G., Ogawa, N., Kikuchi, S., Nakazawa, S., Terui, F., Tanaka, S., Saiki, T., Yoshikawa, M., Watanabe, S.-i., and Tsuda, Y. (2023) Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu. Science, 379(6634), eabn9033. doi:10.1126/science.abn9033. [Abstract]
  • Broadley, M.W., Byrne, D.J., Füri, E., Zimmermann, L., Marty, B., Okazaki, R., Yada, T., Kitajima, F., Tachibana, S., Yogata, K., Sakamoto, K., Yurimoto, H., Nakamura, T., Noguchi, T., Naraoka, H., Yabuta, H., Watanabe, S., Tsuda, Y., Nishimura, M., Nakato, A., Miyazaki, A., Abe, M., Okada, T., Usui, T., Yoshikawa, M., Saiki, T., Tanaka, S., Terui, F., Nakazawa, S., Busemann, H., Hashizume, K., Gilmour, J.D., Meshik, A., Riebe, M.E.I., Krietsch, D., Maden, C., Ishida, A., Clay, P., Crowther, S.A., Fawcett, L., Lawton, T., Pravdivtseva, O., Miura, Y.N., Park, J., Bajo, K., Takano, Y., Yamada, K., Kawagucci, S., Matsui, Y., Yamamoto, M., Righter, K., Sakai, S., Iwata, N., Shirai, N., Sekimoto, S., Inagaki, M., Ebihara, M., Yokochi, R., Nishiizumi, K., Nagao, K., Lee, J.I., Kano, A., Caffee, M.W., and Uemura, R. (2023) The noble gas and nitrogen relationship between Ryugu and carbonaceous chondrites. Geochimica et Cosmochimica Acta, 345, 62-74. doi:10.1016/j.gca.2023.01.020. [Open Access]
  • Choi, H., Choi, B., Chikaraishi, Y., Takano, Y., Kim, H., Lee, K., Lim, D., and Shin, K.-H. (2022) Microbial alteration in marine sediments: Insights from compound-specific isotopic compositions of amino acids in subseafloor environments. Frontiers in Marine Science, 9:1030669. doi:10.3389/fmars.2022.1030669. [Open Access]
  • Okazaki, R., Miura, Y.N., Takano, Y., Sawada, H., Sakamoto, K., Yada, T., Yamada, K., Kawagucci, S., Matsui, Y., Hashizume, K., Ishida, A., Broadley, M.W., Marty, B., Byrne, D., Furi, E., Meshik, A., Pravdivtseva, O., Busemann, H., Riebe, M.E.I., Gilmour, J., Park, J., Bajo, K.-i., Righter, K., Sakai, S., Sekimoto, S., Kitajima, F., Crowther, S.A., Iwata, N., Shirai, N., Ebihara, M., Yokochi, R., Nishiizumi, K., Nagao, K., Lee, J.I., Clay, P., Kano, A., Caffee, M.W., Uemura, R., Inagaki, M., Krietsch, D., Maden, C., Yamamoto, M., Fawcett, L., Lawton, T., Nakamura, T., Naraoka, H., Noguchi, T., Yabuta, H., Yurimoto, H., Tsuda, Y., Watanabe, S.-i., Abe, M., Arakawa, M., Fujii, A., Hayakawa, M., Hirata, N., Hirata, N., Honda, R., Honda, C., Hosoda, S., Iijima, Y.-i., Ikeda, H., Ishiguro, M., Ishihara, Y., Iwata, T., Kawahara, K., Kikuchi, S., Kitazato, K., Matsumoto, K., Matsuoka, M., Michikami, T., Mimasu, Y., Miura, A., Morota, T., Nakazawa, S., Namiki, N., Noda, H., Noguchi, R., Ogawa, N., Ogawa, K., Okada, T., Okamoto, C., Ono, G., Ozaki, M., Saiki, T., Sakatani, N., Senshu, H., Shimaki, Y., Shirai, K., Sugita, S., Takei, Y., Takeuchi, H., Tanaka, S., Tatsumi, E., Terui, F., Tsukizaki, R., Wada, K., Yamada, M., Yamada, T., Yamamoto, Y., Yano, H., Yokota, Y., Yoshihara, K., Yoshikawa, M., Yoshikawa, K., Furuya, S., Hatakeda, K., Hayashi, T., Hitomi, Y., Kumagai, K., Miyazaki, A., Nakato, A., Nishimura, M., Soejima, H., Iwamae, A., Yamamoto, D., Yogata, K., Yoshitake, M., Fukai, R., Usui, T., Ireland, T., Connolly, H.C., Lauretta, D.S. and Tachibana, S. (2022) First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from Ryugu. Science Advances, 8(46), eabo7239. doi:10.1126/sciadv.abo7239. [Open Access]
  • Okazaki, R., Marty, B., Busemann, H., Hashizume, K., Gilmour, J.D., Meshik, A., Yada, T., Kitajima, F., Broadley, M.W., Byrne, D., Furi, E., Riebe, M.E.I., Krietsch, D., Maden, C., Ishida, A., Clay, P., Crowther, S.A., Fawcett, L., Lawton, T., Pravdivtseva, O., Miura, Y.N., Park, J., Bajo, K.-i., Takano, Y., Yamada, K., Kawagucci, S., Matsui, Y., Yamamoto, M., Righter, K., Sakai, S., Iwata, N., Shirai, N., Sekimoto, S., Inagaki, M., Ebihara, M., Yokochi, R., Nishiizumi, K., Nagao, K., Lee, J.I., Kano, A., Caffee, M.W., Uemura, R., Nakamura, T., Naraoka, H., Noguchi, T., Yabuta, H., Yurimoto, H., Tachibana, S., Sawada, H., Sakamoto, K., Abe, M., Arakawa, M., Fujii, A., Hayakawa, M., Hirata, N., Hirata, N., Honda, R., Honda, C., Hosoda, S., Iijima, Y.-i., Ikeda, H., Ishiguro, M., Ishihara, Y., Iwata, T., Kawahara, K., Kikuchi, S., Kitazato, K., Matsumoto, K., Matsuoka, M., Michikami, T., Mimasu, Y., Miura, A., Morota, T., Nakazawa, S., Namiki, N., Noda, H., Noguchi, R., Ogawa, N., Ogawa, K., Okada, T., Okamoto, C., Ono, G., Ozaki, M., Saiki, T., Sakatani, N., Senshu, H., Shimaki, Y., Shirai, K., Sugita, S., Takei, Y., Takeuchi, H., Tanaka, S., Tatsumi, E., Terui, F., Tsukizaki, R., Wada, K., Yamada, M., Yamada, T., Yamamoto, Y., Yano, H., Yokota, Y., Yoshihara, K., Yoshikawa, M., Yoshikawa, K., Furuya, S., Hatakeda, K., Hayashi, T., Hitomi, Y., Kumagai, K., Miyazaki, A., Nakato, A., Nishimura, M., Soejima, H., Iwamae, A., Yamamoto, D., Yogata, K., Yoshitake, M., Fukai, R., Usui, T., Connolly, H.C., Lauretta, D., Watanabe, S.-i. and Tsuda, Y. (2023) Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution. Science, 379(6634), eabo0431. doi:10.1126/science.abo0431. [Abstract]
  • Nakato, A., Inada, S., Furuya, S., Nishimura, M., Yada, T., Abe, M., Usui, T., Yoshida, H., Mikouchi, T., Sakamoto, K., Yano, H., Miura, Y.N., Takano, Y., Yamanouchi, S., Okazaki, R., Sawada, H., and Tachibana, S. (2022) Ryugu particles found outside the Hayabusa2 sample container. Geochemical Journal, 56(6), 197-222. doi:10.2343/geochemj.GJ22017. [Open Access]
  • Kobayashi, K., Nauny, P., Takano, Y., Honma, C., Kurizuka, T., Ishikawa, Y., Yogosawa, S., Obayashi, Y., Kaneko, T., Kebukawa, Y., Mita, H., Ogawa, M., Enya, K., Yoshimura, Y., and McKay, C.P. (2022) Biomarkers in the Atacama Desert along the moisture gradient and the depth in the hyperarid zone: Phosphatase activity as trace of microbial activity. International Journal of Astrobiology, 21(5), 329-351. doi:10.1017/S1473550422000325. [Open Access]
  • Ishikawa, N.F., Ogawa, N.O., Sun, Y., Chikaraishi, Y., Takano, Y., and Ohkouchi, N. (2022) Integrative assessment of amino acid nitrogen isotopic composition in biological tissue samples determined by GC/C/IRMS, LC × EA/IRMS, and LC × GC/C/IRMS. Limnology and Oceanography: Methods, 20(9), 531-542. doi:10.1002/lom3.10502. [Open Access]
  • Urai, A., Takano, Y., Matsui, Y., Iwata, H., Miyairi, Y., Yokoyama, Y., Miyabara, Y., Ohkouchi, N. and Park, H.-D. (2022) Origin of Deep Methane from Active Faults along the Itoigawa Shizuoka Tectonic Line between the Eurasian and North American Plates: 13C/12C and 14C/12C Methane Profiles from a Pull-Apart Basin at Lake Suwa. ACS Earth and Space Chemistry, 6(7), 1689-1697. doi: 10.1021/acsearthspacechem.1c00392. [Abstract]
    [Press Release]
  • Oba, Y., Takano, Y., Furukawa, Y., Koga, T., Glavin, D.P., Dworkin, J.P. and Naraoka, H. (2022) Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites. Nature Communications, 13, Article number: 2008. doi: 10.1038/s41467-022-29612-x. [Abstract]
    [Press Release]
    [TOPICS from NASA/GSFC]
    [TOPICS from Natural History Museum]
  • Miura, Y.N., Okazaki, R., Takano, Y., Sakamoto, K., Tachibana, S., Yamada, K., Sakai, S. and Sawada, H. (2022) The GAs Extraction and Analyses system (GAEA) for immediate extraction and measurements of volatiles in the Hayabusa2 sample container. Earth, Planets and Space, 74, Article number: 76. doi: 10.1186/s40623-022-01638-x. [Abstract]
  • Sakamoto, K., Takano, Y., Sawada, H., Okazaki, R., Noguchi, T., Uesugi, M., Yano, H., Yada, T., Abe, M., Tachibana, S. and Hayabusa2 project member (2022) Environmental assessment in the prelaunch phase of Hayabusa2 for safety declaration of returned samples from the asteroid (162173) Ryugu: Background monitoring and risk management during development of the sampler system. Earth, Planets and Space, 74, Article number: 90. doi: 10.1186/s40623-022-01628-z. [Abstract]
  • Tachibana, S., Sawada, H., Okazaki, R., Takano, Y., Sakamoto, K., Miura, Y.N., Okamoto, C., Yano, H., Yamanouchi, S., Michel, P., Zhang, Y., Schwartz, S., Thuillet, F., Yurimoto, H., Nakamura, T., Noguchi, T., Yabuta, H., Naraoka, H., Tsuchiyama, A., Imae, N., Kurosawa, K., Nakamura, A.M., Ogawa, K., Sugita, S., Morota, T., Honda, R., Kameda, S., Tatsumi, E., Cho, Y., Yoshioka, K., Yokota, Y., Hayakawa, M., Matsuoka, M., Sakatani, N., Yamada, M., Kouyama, T., Suzuki, H., Honda, C., Yoshimitsu, T., Kubota, T., Demura, H., Yada, T., Nishimura, M., Yogata, K., Nakato, A., Yoshitake, M., Suzuki, A.I., Furuya, S., Hatakeda, K., Miyazaki, A., Kumagai, K., Okada, T., Abe, M., Usui, T., Ireland, T.R., Fujimoto, M., Yamada, T., Arakawa, M., Connolly, H.C., Fujii, A., Hasegawa, S., Hirata, N., Hirata, N., Hirose, C., Hosoda, S., Iijima, Y., Ikeda, H., Ishiguro, M., Ishihara, Y., Iwata, T., Kikuchi, S., Kitazato, K., Lauretta, D.S., Libourel, G., Marty, B., Matsumoto, K., Michikami, T., Mimasu, Y., Miura, A., Mori, O., Nakamura-Messenger, K., Namiki, N., Nguyen, A.N., Nittler, L.R., Noda, H., Noguchi, R., Ogawa, N., Ono, G., Ozaki, M., Senshu, H., Shimada, T., Shimaki, Y., Shirai, K., Soldini, S., Takahashi, T., Takei, Y., Takeuchi, H., Tsukizaki, R., Wada, K., Yamamoto, Y., Yoshikawa, K., Yumoto, K., Zolensky, M.E., Nakazawa, S., Terui, F., Tanaka, S., Saiki, T., Yoshikawa, M., Watanabe, S. and Tsuda, Y. (2022) Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth. Science, 375, 1011-1016. doi: 10.1126/science.abj8624. [Abstract]
    [TOPICS]
  • Yada, T., Abe, M., Okada, T., Nakato, A., Yogata, K., Miyazaki, A., Hatakeda, K., Kumagai, K., Nishimura, M., Hitomi, Y., Soejima, H., Yoshitake, M., Iwamae, A., Furuya, S., Uesugi, M., Karouji, Y., Usui, T., Hayashi, T., Yamamoto, D., Fukai, R., Sugita, S., Cho, Y., Yumoto, K., Yabe, Y., Bibring, J.-P., Pilorget, C., Hamm, V., Brunetto, R., Riu, L., Lourit, L., Loizeau, D., Lequertier, G., Moussi-Soffys, A., Tachibana, S., Sawada, H., Okazaki, R., Takano, Y., Sakamoto, K., Miura, Y.N., Yano, H., Ireland, T.R., Yamada, T., Fujimoto, M., Kitazato, K., Namiki, N., Arakawa, M., Hirata, N., Yurimoto, H., Nakamura, T., Noguchi, T., Yabuta, H., Naraoka, H., Ito, M., Nakamura, E., Uesugi, K., Kobayashi, K., Michikami, T., Kikuchi, H., Hirata, N., Ishihara, Y., Matsumoto, K., Noda, H., Noguchi, R., Shimaki, Y., Shirai, K., Ogawa, K., Wada, K., Senshu, H., Yamamoto, Y., Morota, T., Honda, R., Honda, C., Yokota, Y., Matsuoka, M., Sakatani, N., Tatsumi, E., Miura, A., Yamada, M., Fujii, A., Hirose, C., Hosoda, S., Ikeda, H., Iwata, T., Kikuchi, S., Mimasu, Y., Mori, O., Ogawa, N., Ono, G., Shimada, T., Soldini, S., Takahashi, T., Takei, Y., Takeuchi, H., Tsukizaki, R., Yoshikawa, K., Terui, F., Nakazawa, S., Tanaka, S., Saiki, T., Yoshikawa, M., Watanabe, S.-i. and Tsuda, Y. (2022) Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu. Nature Astronomy, 6, 214-220, doi: 10.1038/s41550-021-01550-6. [Abstract]
    [TOPICS]
  • Urai, A., Matsushita, M., Park, H.-D., Imachi, H., Ogawara, M., Iwata, H., Kaneko, M., Ogawa, O.N., Ohkouchi, N. and Takano, Y. (2021) Detection of planktonic coenzyme factor 430 in a freshwater lake: Small-scale analysis for probing archaeal methanogenesis. Progress in Earth and Planetary Science, 8, Article number: 62. doi: 10.1186/s40645-021-00450-7. [Abstract]
  • Kebukawa, Y., Zolensky, M.E., Goodrich, C.A., Ito, M., Ogawa, N.O., Takano, Y., Ohkouchi, N., Kiryu, K., Igisu, M., Shibuya, T., Marcus, M.A., Ohigashi, T., Martinez, J., Kodama, Y., Shaddad, M.H. and Jenniskens, P. (2021) Organic matter in carbonaceous chondrite lithologies of Almahata Sitta: Incorporation of previously unsampled carbonaceous chondrite lithologies into ureilitic regolith. Meteoritics & Planetary Science, 56, 1311-1327. doi: 10.1111/maps.13713. [Abstract]
  • Kaneko, M., Takano, Y., Kamo, M., Morimoto, K., Nunoura, T. and Ohkouchi, N. (2021) Insights into the methanogenic population and potential in subsurface marine sediments based on coenzyme F430 as a function-specific compound analysis. JACS Au, 1, 1743-1751. doi: 10.1021/jacsau.1c00307. [Abstract]
  • Ito, M., Takano, Y., Kebukawa, Y., Ohigashi, T., Matsuoka, M., Kiryu, K., Uesugi, M., Nakamura, T., Yuzawa, H., Yamada, K., Naraoka, H., Yada, T., Abe, M., Hayakawa, M., Saiki, T., Tachibana, S.and Hayabusa2 project team (2021) Assessing the debris generated by the small carry-on impactor operated from the Hayabusa2 mission. Geochemical Journal, 55, 223-239. doi:10.2343/geochemj.2.0632. [Abstract]
  • Fujiya, W., Furukawa, Y., Sugahara, H., Koike, M., Bajo, K.-i., Chabot, N.L., Miura, Y.N., Moynier, F., Russell, S.S., Tachibana, S., Takano, Y., Usui, T. and Zolensky, M.E. (2021) Analytical Protocols for Phobos Regolith Samples Returned by the Martian Moons Exploration (MMX) Mission. Earth, Planets and Space, 73, Article number: 120. doi: 10.1186/s40623-021-01438-9. [Abstract]
  • Takano, Y., Oba, Y., Furota, S., Naraoka, H., Ogawa, N.O., Blattmann, T.M. and Ohkouchi, N. (2021) Analytical development of seamless procedures on cation-exchange chromatography and ion-pair chromatography with high-precision mass spectrometry for short-chain peptides. International Journal of Mass Spectrometry, 462, 116529. doi: 10.1016/j.ijms.2021.116529. [Abstract]
  • Sproson, D.A., Takano, Y., Miyairi, Y., Aze, T., Matsuzaki, H., Ohkouchi, N. and Yokoyama, Y. (2021) Beryllium isotopes in sediments from Lake Maruwan Oike and Lake Skallen, East Antarctica, reveal substantial glacial discharge during the late Holocene. Quaternary Science Reviews, 256, 106841, doi: 10.1016/j.quascirev.2021.106841. [Abstract]
  • Urai, A., Takano, Y., Imachi, H., Ishii, S.i., Matsui, Y., Ogawara, M., Tasumi, E., Miyairi, Y., Ogawa, N.O., Yoshimura, T., Inagaki, F., Yokoyama, Y., Kawano, K., Murai, D., Park, H.-D. and Ohkouchi, N. (2021) Origin of deep methane associated with a unique community of microorganisms in an organic- and Iodine-rich aquifer. ACS Earth and Space Chemistry, 5, 1-11. doi: 10.1021/acsearthspacechem.0c00204. [Abstract]
    [Press Release]
  • Oba, Y., Takano, Y., Naraoka, H., Furukawa, Y., Glavin, D.P., Dworkin, J.P. and Tachibana, S. (2020) Extraterrestrial hexamethylenetetramine in meteorites?a precursor of prebiotic chemistry in the inner solar system. Nature Communications, 11, Article number: 6243. doi: 10.1038/s41467-020-20038-x. [Abstract]
    [Press Release]
  • Takizawa, Y., Takano, Y., Choi, B., Dharampal, P., Steffan, S., Ogawa, N.O., Ohkouchi, N. and Chikaraishi, Y. (2020) A new insight into isotopic fractionation associated with decarboxylation in organisms: implications for amino acid isotope approaches in biogeoscience. Progress in Earth and Planetary Science, 7, Article number: 50. doi: 10.1186/s40645-020-00364-w. [Abstract]
  • Isaji, Y., Ogawa, N. O., Takano, Y. and Ohkouchi, N. (2020) Quantification and carbon and nitrogen isotopic measurements of heme B in environmental samples. Analytical Chemistry, 92, 11213-11222. doi:10.1021/acs.analchem.0c01711. [Abstract]
  • Sun, Y., Ishikawa, N.F., Ogawa, N.O., Kawahata, H., Takano, Y. and Ohkouchi, N. (2020) A method for stable carbon isotope measurement of underivatized individual amino acids by multi-dimensional high-performance liquid chromatography and elemental analyzer/isotope ratio mass spectrometry. Rapid Communications in Mass Spectrometry, 34, e8885. doi:10.1002/rcm.8885. [Abstract]
  • Takano, Y., Yamada, K., Okamoto, C., Sawada, H., Okazaki, R., Sakamoto, K., Kebukawa, Y., Kiryu, K., Shibuya, T., Igisu, M., Yano, H., Tachibana, S. and Hayabusa2 project team (2020) Chemical assessment of the explosive chamber in the projector system of Hayabusa2 for asteroid sampling. Earth, Planets and Space, 72, Article number: 97. doi:10.1186/s40623-020-01217-y. [Abstract]
  • Nakano, H., Hirakawa, N., Matsubara, Y., Yamashita, S., Okuchi, T., Asahina, K., Tanaka, R., Suzuki, N., Naraoka, H., Takano, Y., Tachibana, S., Hama, T., Oba, Y., Kimura, Y., Watanabe, N. and Kouchi, A. (2020) Precometary organic matter: A hidden reservoir of water inside the snow line. Scientific Reports, 10, Article number: 7755. doi:10.1038/s41598-020-64815-6. [Abstract]
    [Press Release]
  • Usui, T., Bajo, K.-i., Fujiya, W., Furukawa, Y., Koike, M., Miura, Y.N., Sugahara, H., Tachibana, S., Takano, Y. and Kuramoto, K. (2020) The Importance of Phobos Sample Return for Understanding the Mars-Moon System. Space Science Reviews, 216, Article number: 49. doi:10.1007/s11214-020-00668-9. [Abstract]
  • Neveu, M., Anbar, A., Davila, A.F., Galvin, D.P., Mackenzie, S.M., Phillips-Lander, C., Sherwood, B., Takano, Y. , Williams, P. and Yano, H. (2020) Returning Samples from Enceladus for Life Detection. Frontiers in Astronomy and Space Sciences, doi:10.3389/fspas.2020.00026. [Abstract]
  • Imachi, H., Nobu, M.K., Nakahara, N., Morono, Y., Ogawara, M., Takaki, Y., Takano, Y., Uematsu, K., Ikuta, T., Ito, M., Matsui, Y., Miyazaki, M., Murata, K., Saito, Y., Sakai, S., Song, C., Tasumi, E., Yamanaka, Y., Yamaguchi, T., Kamagata, Y., Tamaki, H. and Takai, K. (2020) Isolation of an archaeon at the prokaryote-eukaryote interface. Nature, 577, 519-525. doi:10.1038/s41586-019-1916-6. [Abstract]
    [Press Release]
  • Kebukawa, Y., Zolensky, M.E., Ito, M., Ogawa, N.O., Takano, Y., Ohkouchi, N., Nakato, A., Suga, H., Takeichi, Y., Takahashi, Y. and Kobayashi, K. (2020) Primordial organic matter in the xenolithic clast in the Zag H chondrite: Possible relation to D/P asteroids. Geochimica et Cosmochimica Acta, 271, 61-77. doi:10.1016/j.gca.2019.12.012. [Abstract]
  • Takahagi, W., Seo, K., Shibuya, T., Takano, Y., Fujishima, K., Saitoh, M., Shimamura, S., Matsui, Y., Tomita, M. and Takai, K. (2019) Peptide synthesis under the alkaline hydrothermal conditions on Enceladus. ACS Earth and Space Chemistry, 3, 2559-2568. doi:10.1021/acsearthspacechem.9b00108. [Abstract]
  • Oba, Y., Takano, Y., Naraoka, H., Watanabe, N. and Kouchi, A. (2019) Nucleobase synthesis in interstellar ices. Nature Communications, 10, doi: 10.1038/s41467-019-12404-1. [Abstract]
  • Isaji, Y., Kawahata, H., Takano, Y., Ogawa, N.O., Kuroda, J., Yoshimura, T., Lugli, S., Manzi, V., Roveri, M. and Ohkouchi, N. (2019) Diazotrophy drives primary production in the organic-rich shales deposited under a stratified environment during the Messinian salinity crisis (Vena del Gesso, Italy). Frontiers in Earth Science, doi: 10.3389/feart.2019.00085. [Abstract]
  • Sugahara, H., Takano, Y., Tachibana, S., Sugawara, I., Chikaraishi, Y., Ogawa, O.N., Ohkouchi, N., Kouchi, A. and Yurimoto, H. (2019) Molecular and isotopic compositions of nitrogen-containing organic molecules formed during UV-irradiation of simulated interstellar ice. Geochemical Journal, 53, 5-20. doi:10.2343/geochemj.2.0553. [Abstract]
  • Uesugi, M., Ito, M., Yabuta, H., Naraoka, H., Kitajima, F., Takano, Y., Mita, H., Kebukawa, Y., Nakato, A. and Karouji, Y. (2019) Further characterization of carbonaceous materials in Hayabusa-returned samples to understand their origin. Meteoritics & Planetary Science, 54, 638-666. doi:10.1111/maps.13236. [Abstract]
  • Sugahara, H., Takano, Y., Karouji, Y., Yada, T., Ohkouchi, N., Abe, M. and Hayabusa2 project team (2018) Amino acids on witness coupons collected from the ISAS/JAXA curation facility for the assessment and quality control of the Hayabusa2 sampling procedures. Earth, Planets and Space, 70: 194. doi: 10.1186/s40623-018-0965-7. [Abstract]
  • Takano, Y., Chikaraishi, Y., Imachi, H., Miyairi, Y., Ogawa, N.O., Kaneko, M., Yokoyama, Y., Krueger, M. and Ohkouchi, N. (2018) Insight into anaerobic methanotrophy from 13C/12C- amino acids and 14C/12C-ANME cells in seafloor microbial ecology. Scientific Reports, 8:14070, doi: 10.1038/s41598-018-31004-5. [Abstract]
    [Supplementary Information]
    [Press Release]
  • Ishikawa, N.F., Itahashi, Y., Blattmann, T.M., Takano, Y., Ogawa, N.O., Yamane, M., Yokoyama, Y., Nagata, T., Yoneda, M., Haghipour, N., Eglinton, T.I. and Ohkouchi, N. (2018) An improved method for isolation and purification of underivatized amino acids for radiocarbon analysis. Analytical Chemistry, 90, 12035-12041. doi: 10.1021/acs.analchem.8b02693. [Abstract]
  • Furota, S., Ogawa, N.O., Takano, Y., Yoshimura, T. and Ohkouchi, N. (2018) Quantitative analysis of underivatized amino acids in the sub- to several-nanomolar range by ion-pair HPLC using a corona-charged aerosol detector (HPLC-CAD). Journal of Chromatography B, 1095, 191-197. doi: 10.1016/j.jchromb.2018.07.033. [Abstract]
  • Ishikawa, N.F., Chikaraishi, Y., Takano, Y., Sasaki, Y., Takizawa, Y., Tsuchiya, M., Tayasu, I., Nagata, T. and Ohkouchi, N. (2018) A new analytical method for determination of the nitrogen isotopic composition of methionine: its application to aquatic ecosystems with mixed resources. Limnology and Oceanography: Methods, 16, 607-620. doi: 10.1002/lom3.10272. [Abstract]
  • Pant, N.C., Jimenez-Espejo, J.F., Cook, C.P., Biswas, P., Upadhyay, D., Kuroda, J., Ito, M., Macky, R., Marchesi, C., Shimizu, K., Senda, R., vande Flierdt, T., Takano, Y., Suzuki, K., Escutia, C. and Shrivastava, P.K. (2018) Suspected meteorite fragments in marine sediments from East Antarctica. Antarctic Science, 30, 307-321. doi:10.1017/S0954102018000299. [Abstract]
  • Sekine, Y., Kodama, K., Kobayashi, T., Obata, S., Chang, Y., Ogawa, N.O.,Takano, Y., Ohkouchi, N., Saiki, K. and Sekine, T. (2018) An experimental study on impact-induced alterations of planetary organic simulants. Meteoritics and Planetary Science, 53, 1267-1282. doi: 10.1111/maps.13075. [Abstract]
  • Sugahara, H., Meinert, C., Nahon, L., Jones, N.C., Hoffmann, S.V., Hamase, K., Takano, Y. and Meierhenrich, U. (2018) D-amino acids in molecular evolution in space: absolute asymmetric photolysis and synthesis of amino acids by circularly polarized light. Biochimica et Biophysica Acta (BBA) Proteins and Proteomics, 1866, 743-758. doi: 10.1016/j.bbapap.2018.01.004. [Abstract]
  • Ohkouchi, N., Chikaraishi, Y., Close, H., Fry, B., Larsen, T., Madigan, D.J., McCarthy, M.D., McMahon, K.W., Nagata, T., Naito, Y.I., Ogawa, N.O., Popp, B.N., Steffan, S.A., Takano, Y., Tayasu, I., Wyatt, A., Yamaguchi, Y.T. and Yokoyama, Y. (2017) Advances in the application of amino acid nitrogen isotopic analysis in ecological and biogeochemical studies. Organic Geochemistry, 113, 150-174. doi:10.1016/j.orggeochem.2017.07.009 [Abstract]
  • Oba, Y., Takano, Y., Naraoka, H., Watanabe, N. and Kouchi, A. (2017) Deuterium fractionation upon the formation of hexamethylenetetramines through photochemical reactions of interstellar ice analogs containing deuterated methanol isotopologues. The Astrophysical Journal, 849, 122 (9pp).doi:10.3847/1538-4357/aa8ea5 [Abstract]
  • Kinoshita, K., Takano, Y., Ohkouchi, N. and Deguchi, S. (2017) Free-radical polymerization of acrylic acid under extreme reaction conditions mimicking deep-sea hydrothermal vents. ACS Omega, 2, 2765-2769. doi:10.1021/acsomega.7b00293 [Abstract]
  • Yamaguchi, T.Y., Chikaraishi, Y., Takano, Y., Ogawa, N.O., Imachi, H., Yokoyama, Y. and Ohkouchi, N. (2017) Fractionation of nitrogen isotopes during amino acid metabolism in heterotrophic and chemoautotrophic microbes across Eukarya, Bacteria, and Archaea: Effects of nitrogen sources and metabolic pathways. Organic Geochemistry, 111, 101-112. doi:10.1016/j.orggeochem.2017.04.004. [Abstract]
  • Takizawa, Y., Dharampal, S.P., Steffan, S.A., Takano, Y., Ohkouchi, N. and Chikaraishi, Y. (2017) Intra-trophic isotopic discrimination of 15N/14N for amino acids in autotrophs: implications for nitrogen dynamics in ecological studies. Ecology and Evolution, 7, 2916-2924. doi: 10.1002/ece3.2866. [Abstract]
  • Sugahara, H., Takano, Y., Ogawa, N.O., Chikaraishi, Y. and Ohkouchi, N. (2017) Nitrogen isotopic fractionation in ammonia during adsorption on silicate surface. ACS Earth and Space Chemistry, 1, 24-29. doi:10.1021/acsearthspacechem.6b00006. [Abstract]
  • Sawada, H., Okazaki, R., Tachibana, S., Sakamoto, K., Takano, Y., Okamoto, C., Yano, H., Miura, Y., Abe, M., Hasegawa, S., Noguchi, T. and Hayabusa2 sampler team (2017) Hayabusa2 Sampler: Collection of asteroidal surface material. Space Science Reviews, 208, 81-106. doi: 10.1007/s11214-017-0338-8 [Abstract]
  • Okazaki, R., Sawada, H., Yamanouchi, S., Tachibana, S., Miura, Y., Sakamoto, K., Takano, Y., Abe, M., Itoh, S., Yamada, K., Yabuta, H., Okamoto, C., Yano, H., Noguchi, T., Nakamura, T. and Nagao, K. (2017) Hayabusa2 sample container: Metal-seal system for vacuum encapsulation of returned samples. Space Science Reviews, 208, 107-124. doi:10.1007/s11214-016-0289-5. [Abstract]
  • Naeher, S., Suga, H., Ogawa, N.O., Takano, Y., Schubert, C.J., Grice, K. and Ohkouchi, N. (2016) Distributions and compound-specific isotopic signatures of sedimentary chlorins reflect the composition of photoautotrophic communities and their carbon and nitrogen sources in Swiss lakes and the Black Sea. Chemical Geology, 443, 198-209. doi:10.1016/j.chemgeo.2016.04.029. [Abstract]
  • Rudd, R.C., Tyler, J.J., Tibby, J., Yokoyama, Y., Tavernier, I., Verleyen, E., Fukui, M. and Takano, Y. (2016) A diatom inferred record of lake variability during the last 900 years in Lutzow-Holm Bay, East Antarctica. Journal of Quaternary Science, 31, 114-125. doi:10.1002/jqs.2845. [Abstract]
  • Oba, Y., Takano, Y., Watanabe, N. and Kouchi, A. (2016) Deuterium fractionation on the formation of amino acids by photolysis of interstellar ice analogues containing deuterated methanol. The Astrophysical Journal Letters , 827, L18. doi:10.3847/2041-8205/827/1/L18. [Abstract]
  • Chan, H.S., Chikaraishi, Y., Takano, Y., Ogawa, N.O. and Ohkouchi, N.(2016) Amino acid compositions in heated carbonaceous chondrites and their compound-specific nitrogen isotopic ratios. Earth, Planets and Space, 68:7. doi:10.1186/s40623-016-0382-8. [Abstract]
  • Kaneko, M., Takano, Y., Ogawa, N.O., Sato, Y., Yoshida, N. and Ohkouchi, N.(2016) Estimation of methanogenesis by quantification of coenzyme F430 in marine sediments.Geochemical Journal, 50, 453-460. doi:10.2343/geochemj.2.0410. [Abstract]
  • Inagaki, F., Hinrichs, K.-U., Kubo, Y., Bowles, M.W., Heuer, V.B., Hong, W.-L., Hoshino, T., Ijiri, A., Imachi, H., Ito, M., Kaneko, M., Lever, M.A., Lin, Y.-S., Methe, B.A., Morita, S., Morono, Y., Tanikawa, W., Bihan, M., Bowden, S.A., Elvert, M., Glombitza, C., Gross, D., Harrington, G.J., Hori, T., Li, K., Limmer, D., Liu, C.-H., Murayama, M., Ohkouchi, N., Ono, S., Park, Y.-S., Phillips, S.C., Prieto-Mollar, X., Purkey, M., Riedinger, N., Sanada, Y., Sauvage, J., Snyder, G., Susilawati, R., Takano, Y., Tasumi, E., Terada, T., Tomaru, H., Trembath-Reichert, E., Wang, D.T. and Yamada, Y.(2015) Exploring deep microbial life in coal-bearing sediment down to ~2.5 km below the ocean floor. Science, 349, 420-424. doi: 10.1126/science.aaa6882. [Abstract]
  • Chikaraishi, Y., Steffan, S., Takano, Y., and Ohkouchi, N. (2015) Diet quality influences isotopic discrimination among amino acids in an aquatic vertebrate. Ecology and Evolution, 5, 2048-2059. doi: 10.1002/ece3.1491. [Abstract]
  • Takano, Y., Kojima, H., Takeda, E., Yokoyama, Y., and Fukui, M. (2015) Biogeochemistry and limnology in Antarctic subglacial weathering: molecular evidence of the linkage between subglacial silica input and primary producers in a perennially ice-covered lake. Progress in Earth and Planetary Science, 2: 8. doi: 10.1186/s40645-015-0036-7. [Abstract]
  • Takano, Y., Chikaraishi, Y. and Ohkouchi, N. (2015) Isolation of underivatized amino acids by ion-pair high performance liquid chromatography for precise measurement of nitrogen isotopic composition of amino acids: development of comprehensive LC x GC/C/IRMS method. International Journal of Mass Spectrometry, 379, 16-25. doi: 10.1016/j.ijms.2014.11.012 [Abstract], [Publication Award_IJMS2015]
  • Naraoka, H., Aoki, D., Fukushima, K., Uesugi, M., Ito, M., Kitajima, F., Mita, H., Yabuta, H., Takano, Y., Yada, T., Ishibashi, Y., Karouji, Y., Okada, T. and Abe, M. (2015) ToF-SIMS analysis of carbonaceous particles in the sample catcher of the Hayabusa spacecraft. Earth, Planets and Space, 67:67. doi:10.1186/s40623-015-0224-0. [Abstract]
  • Kitajima, F., Uesugi, M., Karouji, Y., Ishibashi, Y., Yada, T., Naraoka, H., Abe, M., Fujimura, A., Ito, M., Yabuta, H., Mita, H., Takano, Y., and Okada, T. (2015) A micro-Raman and infrared study of the several Hayabusa category 3 (organic) particles. Earth, Planets and Space, 67:20. doi:10.1186/s40623-015-0182-6. [Abstract]
  • Tachibana, S., Abe, M., Arakawa, M., Fujimoto, M., Iijima, Y., Ishiguro, M., Kitazato, K., Kobayashi, N., Namiki, N., Okada, T., Okazaki, R., Sawada, H., Sugita, S., Takano, Y., Tanaka, S., Watanabe, S., Yoshikawa, M., Kuninaka, H. and Hayabusa2 project team (2014) Hayabusa2: Scientific importance of samples returned from near-Earth C-type asteroid 1999 JU3. Geochemical Journal, 48, 571-587. doi:10.2343/geochemj.2.0350. [Abstract]
  • Yabuta, H., Uesugi, M., Naraoka, H., Ito, M., Kilcoyne, A.L.D., Sandford, S.A., Kitajima, F., Mita, H., Takano, Y., Yada, T., Karouji, Y., Ishibashi, Y., Okada, T. and Abe, M. (2014) Molecular compositions of Hayabusa Category 3 carbonaceous particles. Earth, Planets and Space, 66:156, doi:10.1186/s40623-014-0156-0. [Abstract]
  • Uesugi, M., Naraoka, H., Ito, M., Yabuta, H., Kitajima, F., Takano, Y., Mita, H., Ohnishi, I., Kebukawa, Y., Yada, T., Karouji, Y., Ishibashi, Y., Okada, T. and Abe, M. (2014) Sequential analysis of carbonaceous materials in Hayabusa-returned samples for the determination of their origin. Earth, Planets and Space, 66: 102. doi:10.1186/1880-5981-66-102. [Abstract]
  • Ito, M., Uesugi, M., Naraoka, H., Yabuta, H., Kitajima, F., Mita, H., Takano, Y., Karouji, Y., Yada, T. and Ishibashi, Y. (2014) H, C, and N isotopic compositions of Hayabusa category 3 organic samples. Earth, Planets and Space, 66: 91. doi:10.1186/1880-5981-66-91 [Abstract]
  • Kaneko, M., Takano, Y., Chikaraishi, Y., Ogawa, N.O., Asakawa, S., Watanabe, K., Shima, S., Krueger, M., Matsushita, M., Kimura, H., and Ohkouchi, N. (2014) Quantitative analysis of coenzyme F430 in environmental samples: a new diagnostic tool for methanogenesis and anaerobic methane oxidation. Analytical Chemistry, 86, 3633-3638. doi: 3610.1021/ac500305j. [Abstract]
  • Ohkouchi, N. and Takano, Y. (2014) Organic nitrogen: sources, fates, and chemistry. Treatise on Geochemistry, Vol. 12, 10: Organic Geochemistry (Edited by Birrer, B., Falkowski, P., Freeman, K.), Elsevier, pp. 251-289. doi: 10.1016/B978-0-08-095975-7.01015-9. [Abstract]
  • Takano, Y., Yano, H., Sekine, Y., Funase, R. and Takai, K (2014) Planetary protection on international waters: an onboard protocol for capsule retrieval and biosafety control in sample return mission. Advances in Space Research, 53, 1135-1142. doi: 10.1016/j.asr.2013.12.041. [Abstract]
  • Sekine, Y., Takano, Y., Yano, H., Funase, R., Takai, K., Ishihara, M., Shibuya, T., Tachibana, S., Kuramoto, K., Yabuta, H., Kimura, J., and Furukawa, Y. (2014) Exploration of Enceladus' water-rich plumes toward understanding of chemistry and biology of the interior ocean. Aerospace Technology Japan -The ISTS special issue of Transactions of JSASS-, 12, Tk 7-11. doi:10.2322/tastj.12.Tk_7 [Abstract]
  • Schouten, S., Hopmans, E.C., Rosell-Mele, A., Pearson, A., Adam, P., Bauersachs, T., Bard, E., Bernasconi, S.M., Bianchi, T.S., Brocks, J.J., Carlson, L.T., Castaneda, I.S., Derenne, S., Selver, A.D., Dutta, K., Eglinton, T., Fosse, C., Galy, V., Grice, K., Hinrichs, K.-U., Huang, Y., Huguet, A., Huguet, C., Hurley, S., Ingalls, A., Jia, G., Keely, B., Knappy, C., Kondo, M., Krishnan, S., Lincoln, S., Lipp, J., Mangelsdorf, K., Martinez-Garcia, A., Menot, G., Mets, A., Mollenhauer, G., Ohkouchi, N., Ossebaar, J., Pagani, M., Pancost, R.D., Pearson, E.J., Peterse, F., Reichart, G.-J., Schaeffer, P., Schmitt, G., Schwark, L., Shah, S.R., Smith, R.W., Smittenberg, R.H., Summons, R.E., Takano, Y., Talbot, H.M., Taylor, K.W.R., Tarozo, R., Uchida, M., van Dongen, B.E., Van Mooy, B.A.S., Wang, J., Warren, C., Weijers, J.W.H., Werne, J.P., Woltering, M., Xie, S., Yamamoto, M., Yang, H., Zhang, C.L., Zhang, Y., Zhao, M., and Sinninghe Damste, J.S. (2013) An interlaboratory study of TEX86 and BIT analysis of sediments, extracts and standard mixtures. Geochemistry, Geophysics, Geosystems, 14, 5263-5285. doi: 10.1002/2013GC004904. [Abstract]
  • Watanabe, T., Kojima, H., Takano, Y., and Fukui, M. (2013) Diversity of sulfur-cycle prokaryotes in freshwater lake sediments investigated using aprA as functional marker gene. Systematics and Applied Microbiology, 36, 436-443. doi: 10.1016/j.syapm.2013.04.009. [Abstract]
  • Taniuchi, T., Takano, Y., and Kobayashi, K. (2013) Amino acid precursors from a simulated lower atmosphere of Titan: Experiments of cosmic ray energy source with 13C- and 18O-stable isotope probing mass spectrometry. Analytical Sciences, 29, 777-785. doi: 10.2116/analsci.29.777. [Abstract] [Hot Article Award]
  • Kaneko, M., Naraoka, H., Takano, Y., and Ohkouchi, N. (2013) Distribution and isotopic signatures of archaeal lipid biomarkers associated with gas hydrate occurrences on the northern Cascadia Margin. Chemical Geology, 343, 76-84. doi: 10.1016/j.chemgeo.2013.02.003. [Abstract]
  • Takano, Y., Kaneko, M., Kahnt, J., Imachi, H., Shima, S. and Ohkouchi, N. (2013) Detection of coenzyme F430 in deep-sea sediments: A key molecule for biological methanogenesis. Organic Geochemistry, 58, 137-140. doi: 10.1016/j.orggeochem.2013.01.012. [Abstract]
  • Takano, Y., Tyler, J.J., Kojima, H., Yokoyama, Y., Tanabe, Y., Sato, T., Ogawa, O.N., Ohkouchi, N. and Fukui, M. (2012) Holocene lake development and glacial-isostatic uplift at Lake Skallen and Lake Oyako, Lutzow-Holm Bay, East Antarctica: based on biogeochemical facies and molecular signatures. Applied Geochemistry, 27, 2546-2559. doi: 10.1016/j.apgeochem.2012.08.009. [Abstract]
  • Bassez, M.-P., Takano, Y., and Kobayashi, K. (2012) Prebiotic organic microstructures. Origins of Life and Evolution of Biospheres, 42, 307-316. doi: 10.1007/s11084-012-9290-5. [Abstract]
  • Kurihara, H., Yabuta, H., Kaneko, T., Obayashi, Y., Takano, Y., and Kobayashi, K. (2012) Formation of organic aggregates by heating products of simulated primitive Earth atmosphere experiments. Chemistry Letters, 41, 441-443. doi:10.1246/cl.2012.441. [Abstract]
  • Kurihara, H., Takano, Y., Kaneko, T., Obayashi, Y., and Kobayashi, K. (2012) Stability of amino acids and related compounds in simulated submarine hydrothermal systems. Bulletin of the Chemical Society of Japan, 85, 624-630. doi:10.1246/bcsj.20110349. [Abstract]
  • Nomaki, H., Ogawa, O.N., Takano, Y., Suga, H., Ohkouchi, N., Kitazato, H. (2011) Differing utilization of glucose and algal particulate organic matter by the deep-sea benthic organisms of Sagami Bay, Japan. Marine Ecology Progress Series, 431, 11-24. doi:10.3354/meps09144. [PDF]
  • Gay, A., Takano, Y., Gilhooly III, W.P., Berndt, C., Heeschen, K., Suzuki, N., Saegusa, S., Nakagawa, F., Tsunogai, U., Jiang, S.Y., and Lopez, M. (2011) Geophysical and geochemical evidence of large scale fluid flow within shallow sediments in the eastern Gulf of Mexico, offshore Louisiana. Geofluids, 11, 34-47. doi: 10.1111/j.1468-8123.2010.00304.x. [Abstract]
  • Takano, Y., Chikaraishi, Y., Ogawa, O.N., Nomaki, H., Morono, Y., Inagaki, F., Kitazato, H., Hinrichs, K.-U., Ohkouchi, N. (2010) Sedimentary membrane lipids recycled by deep-sea benthic archaea. Nature Geoscience, 3, 858-861. doi:10.1038/ngeo983. [Abstract] or [JAMSTEC Repository] [Supplementary Information]
  • Takano, Y., Kashiyama, Y., Ogawa, O.N., Chikaraishi, Y., Ohkouchi, N., (2010) Isolation and desalting with cation-exchange chromatography for compound-specific nitrogen isotope analysis of amino acids. Rapid Communications in Mass Spectrometry, 24, 2317-2323. doi: 10.1002/rcm.4651. [Abstract]
  • Takano, Y., Chikaraishi, Y., and Ohkouchi, N. (2010) Enantiomer-specific isotope analysis (ESIA) of D- and L-alanine: nitrogen isotopic hetero- and homogeneity by microbial process and chemical process. Earth, Life, and Isotopes (edited by N. Ohkouchi, I. Tayasu, and K. Koba). Kyoto University Press., pp. 387-402.
  • Chikaraishi Y., Takano Y., Ogawa O. N., and Ohkouchi, N. (2010) Instrumental optimization for compound-specific nitrogen isotope analysis of amino acids by gas chromatography/combustion/isotope ratio mass spectrometry. Earth, Life, and Isotopes (edited by N. Ohkouchi, I. Tayasu, and K. Koba). Kyoto University Press., pp. 367-386.
  • Takano, Y., Yokoyama, Y., Tyler, J.J., Fukui, M., Sato, T., Ogawa, N.O., Suzuki, N., Kitazato, H., and Ohkouchi, N. (2010) Crustal uplifting rate associated with late-Holocene glacial-isostatic rebound at Skallen and Skarvsnes, Lutzow-Holm Bay, East Antarctica: evidence of a synchrony in sedimentary and biological facies on geological setting. Biogeosciences Discuss, 7, 4341-4384, doi:10.5194/bgd-7-4341-2010. [Abstract]
  • Kato, S., Takano, Y., Kakegawa, T., Oba, H., Inoue, K., Kobayashi, C., Utsumi, M., Marumo, K., Kobayashi, K., Ito, Y., Ishibashi, J., and Yamagishi, A. (2010) Biogeography and biodiversity in sulfide structures of active and inactive vents at deep-sea hydrothermal fields of the Southern Mariana Trough. Applied and Environmental Microbiology, 76, 2968-2979. doi: 10.1128/AEM.00478-10. [Abstract]
  • Fujii, M., Takano, Y., Kojima, H., Hoshino, T., Tanaka, R., and Fukui, M. (2010) Microbial community structure, pigment composition, and nitrogen source of red snow in Antarctica. Microbial Ecology, 59, 466-475. doi: 10.1007/s00248-009-9594-9. [Abstract]
  • Chikaraishi, Y., Ogawa, O. N., Kashiyama, Y., Takano, Y., Suga, H., Tomitani, A., Miyashita, H., Kitazato, H., and Ohkouchi, N. (2009) Determination of aquatic food-web structure based on compound-specific nitrogen isotopic composition of amino acids. Limnology and Oceanography: Method, 7, 740-750. doi: 10.4319/lom.2009.7.740. [Abstract]
  • Kato, S., Yanagawa, K., Sunamura, M., Takano, Y., Ishibashi, J.-I., Kakegawa, T., Utsumi, M., Yamanaka, T., Toki, T., Noguchi, T., Kobayashi, K., Moroi, A., Kimura, H., Kawarabayasi, Y., Marumo, K., Urabe, T., and Yamagishi, A. (2009) Abundance of Zetaproteobacteria within crustal fluids in back-arc hydrothermal fields of the Southern Mariana Trough. Environmental Microbiology, 11, 3210-3222. doi: 10.1111/j.1462-2920.2009.02031.x. [Abstract]
  • Bassez, M-P., Takano, Y., and Ohkouchi, N. (2009) Organic analysis of peridotite rocks from Ashadze and Logatchev hydrothermal sites. International Journal of Molecular Sciences, 10, 2986-2998. doi:10.3390/ijms10072986. [Abstract]
  • Takano, Y., Chikaraishi, Y., Ogawa, O. N., Kitazato, H., and Ohkouchi, N. (2009) Compound-specific nitrogen isotope analysis of D-alanine, L-alanine, and valine: application of diastereomer separation to delta 15 N and microbial peptidoglycan studies. Analytical Chemistry, 81, 394-399. doi: 10.1021/ac802077v. [Abstract]
  • Kashiyama, Y., Miyashita, H., Ohkubo, S., Ogawa, O. N., Chikaraishi, Y., Takano, Y., Suga, H., Toyohuku, T., Nomaki, H., Kitazato, H., Nagata, T., and Ohkouchi, N. (2008) Evidence for the global distribution of Chlorophyll-d. Science, 321, 658-658. doi: 10.1126/science.1158761. [Abstract]
  • Flemings, P.B., Long H., Dugan B., Germaine J., John C.M., Behrmann J.H., Sawyer D. and IODP Expedition 308 Scientists (2008) Pore pressure penetrometers document high overpressure near the seafloor where multiple submarine landslides have occurred on the continental slope, offshore Louisiana, Gulf of Mexico. Earth and Planetary Science Letters, 269 , 309-325. doi: 10.1016/j.epsl.2007.12.005. [Abstract]
  • Marumo, K., Urabe, T., Goto, A., Takano, Y., and Nakaseama, M. (2008) Mineralogy and isotope geochemistry of active submarine hydrothermal field at Suiyo Seamount, Izu-Bonin Arc, West Pacific Ocean. Resource Geology, 58, 220-248. doi: 10.1111/j.1751-3928.2008.00059.x. [Abstract] [Best Article Award 2008]
  • Kobayashi, K., Ogawa, T., Tonishi, H., Kaneko, T., Takano, Y., Takahashi, J., Saito, T., Muramatsu, Y., Yoshida, S., and Utsumi, U. (2008) Synthesis of amino acid precursors from simulated interstellar media by high-energy particles or photons. Electronics and Communications in Japan, 91, 15-21. doi:10.1002/ecj.10069. [Abstract]
  • Takano, Y., Takahashi, J., Kaneko, T., Marumo, K. and Kobayashi, K. (2007) Asymmetric synthesis of amino acid precursors in interstellar complex organics by circularly polarized light. Earth and Planetary Science Letters, 254, 106-117. doi: 10.1016/j.epsl.2006.11.030. [Abstract]
  • Kudo, J., Kobayashi,K., Marumo, K., and Takano, Y. (2006) Fluctuation in proteinceous labile organic matter verified with degradation rate constants of biochemical indicators. Organic Geochemistry, 37, 1655-1663. [Abstract]
  • Shipboard Scientific Party of IODP EXP 308 (2006) Gulf of Mexico Hydrogeology: Overpressure and fluid flow processes in the deepwater Gulf of Mexico: slope stability, seeps, and shallow-water flow, Proceedings of the Integrated Ocean Drilling Program (IODP), Vol. 308, College Station TX (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.308.101.2006. [Abstract]
  • Takano, Y., Mori, H., Kaneko, T., Ishikawa, Y., Marumo, K., and Kobayashi, K. (2006) Phosphatase and microbial activity with biochemical indicators in semi-permafrost active layer sediments over the past 10,000 years. Applied Geochemistry, 21, 48-57. [Abstract]
  • Takano, Y., Kobayashi, K., Ishikawa, Y., and Marumo, K. (2006) Emergence of the inflection point on the racemization rate constant of D- and L- amino acids in the early stage of terrestrial diagenesis. Organic Geochemistry, 37, 334-341. [Abstract]
  • Takano, Y., Marumo, K., Ebashi, T., Gupta, L. P., Kawahata, H., Yamagishi, A., Kobayashi, K., and Kuwabara, K. (2005) In situ ore-formation experiment: amino acids and amino sugars trapped in artificial chimneys onto deep-sea hydrothermal systems at Suiyo seamount, Izu-Bonin Arc, Pacific ocean. Bulletin of the Chemical Society of Japan, 78, 638-651. [Abstract]
  • Takano, Y., Edazawa, Y., Kobayashi, K., Urabe, T., and Marumo, K. (2005) Evidence of sub-vent biosphere: Enzymatic activities in 308 degree-C deep-sea hydrothermal systems at Suiyo seamount, Izu-Bonin Arc, Western Pacific Ocean. Earth and Planetary Science Letters, 229, 193-203. [Abstract]
  • Takano, Y., Ohashi, A., Kaneko, T., and Kobayashi, K. (2004) Abiotic synthesis of high-molecular-weight organics from inorganic gas mixture of carbon monoxide, ammonia and water by 3 MeV Proton Irradiation. Applied Physics Letters, 84, 1410-1412. [Abstract]
  • Takano, Y., Kudo, J., Kaneko, T., Kobayashi, K., Kawasaki, Y., and Ishikawa, Y. (2004) Distribution of amino acids and its stereo chemistry related with biological activities over the past 10,000 years in Rikubetsu, Hokkaido, Japan. Geochemical Journal, 38, 153-161. [Abstract]
  • Kobayashi, K., Takano, Y., Kaneko, T., Hashimoto, H., and Saito, T. (2004) Possible cometary organic compounds as sources of planetary biosphere. Advances in Space Research, 33, 1277-1281. [Abstract]
  • Takano, Y., Tsuboi, T., Kaneko, K., Kobayashi, K., and Marumo, K. (2004) Pyrolysis of high-molecular-weight complex organics synthesized from simulated interstellar gas mixture irradiated with 3 MeV proton irradiation. Bulletin of the Chemical Society of Japan, 77 ,779-783. [Abstract]
  • Takano, Y., Kobayashi, K., Hiroishi, D., Ikeda, H., and Marumo, K. (2004) Experimental verification of photostability for free and bound amino acids exposed to gamma-rays and UV irradiation. Earth Planets Space, 56, 669-674. [Abstract]
  • Takano, Y., Marumo, K., Yabashi, S., Kaneko, T., and Kobayashi, K. (2004) Pyrolysis of complex organics simulated by cosmic rays irradiation of simple inorganic gas mixture. Applied Physics Letters, 85, 1633-1635. [Abstract]
  • Horiuchi, T., Takano, Y., Kobayashi, K., Marumo, M., Ishibashi, J., and Urabe, T. (2004) Amino acids in hydrothermal water samples obtained from deep-sea hydrothermal vents at Suiyo seamount, Izu-Bonin Arc, Pacific ocean. Organic Geochemistry, 35, 1121-1128. [Abstract]
  • Takano, Y., Gupta, L. P., Kawahata, H., Marumo, K., Ishikawa, Y., and Kobayashi, K. (2004) Glucosamine and Galactosamine in terrestrial organic matter and their correlation with other biochemical indicators. Bulletin of the Chemical Society of Japan, 77, 729-732. [Abstract]
  • Takano, Y., Horiuchi, T., Kobayashi, K., Marumo, K., Nakashima, M., and Urabe, T. (2004) Vertical distribution and chiral ratio of amino acids in deep-sea hydrothermal sub-vent core samples at Suiyo seamount, Izu-Bonin Arc, Pacific ocean. Organic Geochemistry, 35, 1105-1120. [Abstract]
  • Takano, Y., Kudo, J., Kaneko, T., Kobayashi, K., and Marumo, K. (2004) Evidence of the Hypsithermal verified using the racemization rate constant of amino acids: an estimation of the paleo-ground temperatures. Bulletin of the Chemical Society of Japan, 77, 1029-1030. [Abstract]
  • Takano, Y., Kobayashi, K., Yamanaka, T., Marumo, K., and Urabe, T. (2004) Amino acids in the 308 degree-C deep-sea hydrothermal system of the Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean. Earth and Planetary Science Letters, 219, 147-153. [Abstract]
  • Takano, Y., Ushio, K., Kaneko, T., Kobayashi, K., and Hashimoto, H. (2003) Amino acid precursors in simulated interstellar dust ice mantle by UV irradiation at 10 K. Chemistry Letters, 32, 612-613. [Abstract]
  • Takano, Y., Horiuchi, T., Kobayashi, K., Urabe, T., and Marumo, K. (2003) Large Enantiomeric Excesses of L-Form Amino Acids in Deep-sea Hydrothermal Sub-vent of 156 degree-C Fluids at the Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean. Chemistry Letters, 32, 970-971. [Abstract]
  • Takano, Y., Sato, R., Kaneko, T., Kobayashi, K., and Marumo, K. (2003) Biological origins for amino acids in Subterranean Hydrothermal vent, Toyoha mine, Hokkaido, Japan. Organic Geochemistry, 34, 1491-1496. [Abstract]
  • Takano, Y., Masuda, H., Kaneko, T., and Kobayashi, K. (2002) Formation of amino acids from possible Interstellar media by gamma-rays and UV irradiation. Chemistry Letters, 10, 986-987. [Abstract]
  • Takano, Y., Ushio, K., Masuda, H., Kaneko, T., Kobayashi, K., Takahashi, J., and Saito, T. (2001) Determination of organic compounds formed in simulated interstellar dust environment. Analytical Sciences, 17, Suppl i1635-1638. [PDF]

Peer-Reviewed Book Chapters, Other Proceedings

  • *Kobayashi, K., Kaneko, T., Takahashi, J.-I., Takano, Y., and Yoshida, S. (2010) High molecular weight complex organics in interstellar space and their relevance to origins of life. Astrobiology: Emergence, Search and Detection of Life (edited by V. Basiuk). American Scientific Publishers, pp. 175-186.
  • *Kobayashi K., Kaneko T., Takano Y., and Takahashi J. (2008) Formation of amino acid precursors with large molecular weight in dense clouds and their relevance to origins of bio-homochirality. Organic Matter in Space (edited by S. A. Sandford & S. Kwok), pp. 465-472. doi:10.1017/S1743921308022199, Cambridge Univ. Press.
  • Behrmann, J.H., Flemings, P.B., John, C.M., and the Expedition 308 Scientists. (2006) Rapid sedimentation, overpressure and focused fluid flow, Gulf of Mexico continental margin. Scientific Drilling, 3, 12-17. doi:10.2204/iodp.sd.3.03.2006. [PDF]
  • Shipboard Scientific Party of IODP EXP 308 (2005) ?gGulf of Mexico Hydrogeology: Overpressure and fluid flow processes in the deepwater Gulf of Mexico: slope stability, seeps, and shallow-water flow?h, Integrated Ocean Drilling Program Expedition 308 Preliminary Report, 1-109. doi:10.2204 /iodp.pr.308.2005. [Abstract]