"Torii;Douglas-Song|Tsutomu;Ota|Masahiro;Yamanaka|Hiroshi;Kitagawa|Ryoji;Tanaka|Christian;Potiszil|Tak;Kunihiro|","Lithium- and oxygen-isotope compositions of a Si-rich nebular reservoir determined from chondrule constituents in the Sahara 97103 EH3 chondrite","Geochimica et Cosmochimica Acta","0016-7037","2025-07","400","","51","71","isVersionOf https://doi.org/10.1016/j.gca.2025.05.038","","001502517200002","https://ousar.lib.okayama-u.ac.jp/69344","10.1016/j.gca.2025.05.038"
    "Dilan M.;Ratnayake|Ryoji;Tanaka|Eizo;Nakamura|","Biogeochemical impact of nickel and urea in the great oxidation event","Communications Earth & Environment","2662-4435","2025-08-12","6","1","654","","isVersionOf https://doi.org/10.1038/s43247-025-02576-8","","","http://escholarship.lib.okayama-u.ac.jp/69110","10.1038/s43247-025-02576-8"
    "Christian;Potiszil|Tsutomu;Ota|Masahiro;Yamanaka|Katsura;Kobayashi|Ryoji;Tanaka|Eizo;Nakamura|","Meteoritic and asteroidal amino acid heterogeneity: Implications for planetesimal alteration conditions and sample return missions","Earth and Planetary Science Letters","0012-821X","2025-03","653","","119205","","isVersionOf https://doi.org/10.1016/j.epsl.2025.119205","","001407331800001","https://ousar.lib.okayama-u.ac.jp/68983","10.1016/j.epsl.2025.119205"
    "Ryoji;Tanaka|Dilan M.;Ratnayake|Tsutomu;Ota|Noah;Miklusicak|Tak;Kunihiro|Christian;Potiszil|Chie;Sakaguchi|Katsura;Kobayashi|Hiroshi;Kitagawa|Masahiro;Yamanaka|Masanao;Abe|Akiko;Miyazaki|Aiko;Nakato|Satoru;Nakazawa|Masahiro;Nishimura|Tatsuaki;Okada|Takanao;Saiki|Satoshi;Tanaka|Fuyuto;Terui|Yuichi;Tsuda|Tomohiro;Usui|Sei-ichiro;Watanabe|Toru;Yada|Kasumi;Yogata|Makoto;Yoshikawa|Eizo;Nakamura|","Unraveling the Cr Isotopes of Ryugu: An Accurate Aqueous Alteration Age and the Least Thermally Processed Solar System Material","The Astrophysical Journal","0004-637X","2024-04-04","965","1","52","","isVersionOf https://doi.org/10.3847/1538-4357/ad276a","","001197227200001","https://ousar.lib.okayama-u.ac.jp/68977","10.3847/1538-4357/ad276a"
    "Dilan M.;Ratnayake|Ryoji;Tanaka|Eizo;Nakamura|","Determination of mass-dependent chromium isotopic compositions in geological samples by double spike-total evaporation-thermal ionization mass spectrometry (DS-TE-TIMS)","Analytica Chimica Acta","0003-2670","2023-10-16","1278","","341723","","isVersionOf https://doi.org/10.1016/j.aca.2023.341723","37709464","001069672800001","http://escholarship.lib.okayama-u.ac.jp/66355","10.1016/j.aca.2023.341723"
    "Christian;Potiszil|Ryoji;Tanaka|Katsura;Kobayashi|Tak;Kunihiro|Eizo;Nakamura|","The Albedo of Ryugu: Evidence for a High Organic Abundance, as Inferred from the Hayabusa2 Touchdown Maneuver","Astrobiology","1531-1074","2020-07-08","20","7","916","921","isVersionOf https://doi.org/10.1089/ast.2019.2198","32543220","000541711900001","https://ousar.lib.okayama-u.ac.jp/61321","10.1089/ast.2019.2198"
    "Eizo;Nakamura|Tak;Kunihiro|Tsutomu;Ota|Chie;Sakaguchi|Ryoji;Tanaka|Hiroshi;Kitagawa|Katsura;Kobayashi|Masahiro;Yamanaka|Yuri;Shimaki|Gray E.;Bebout|Hitoshi;Miura|Tetsuo;Yamamoto|Vladimir;Malkovets|Victor;Grokhovsky|Olga;Koroleva|Konstantin;Litasov|","Hypervelocity collision and water-rock interaction in space preserved in the Chelyabinsk ordinary chondrite","Proceedings of the Japan Academy, Ser. B Physical and Biological Sciences","0386-2208","2019-04-11","95","4","165","177","isVersionOf https://doi.org/10.2183/pjab.95.013","30971619","000470804000002","https://ousar.lib.okayama-u.ac.jp/57944","10.2183/pjab.95.013"
    "Dejene Hailemariam;Feyissa|Hiroshi;Kitagawa|Tesfaye Demissie;Bizuneh|Ryoji;Tanaka|Kurkura;Kabeto|Eizo;Nakamura|","Transition from Plume-driven to Plate-driven Magmatism in the Evolution of the Main Ethiopian Rift","Journal of Petrology","0022-3530","2019-09-12","60","8","1681","1715","isVersionOf https://doi.org/10.1093/petrology/egz043","","000509550500007","https://ousar.lib.okayama-u.ac.jp/57934","10.1093/petrology/egz043"
    "Tsutomu;Ota|Yuhei;Aihara|Shoichi;Kiyokawa|Ryoji;Tanaka|Eizo;Nakamura|","Tourmaline in a Mesoarchean pelagic hydrothermal system: Implications for the habitat of early life","Precambrian Research","03019268","2019-11","334","","105475","","isVersionOf https://doi.org/10.1016/j.precamres.2019.105475","","000496875000010","https://ousar.lib.okayama-u.ac.jp/57034","10.1016/j.precamres.2019.105475"
    "Xiaoyu;Zhou|Ryoji;Tanaka|Masahiro;Yamanaka|Chie;Sakaguchi|Eizo;Nakamura|","Method to Suppress Isobaric and Polyatomic Interferences for Measurements of Highly Siderophile Elements in Desilicified Geological Samples","Geostandards and Geoanalytical Research","16394488","2019-03-20","43","4","611","633","isVersionOf https://doi.org/10.1111/ggr.12280","","000474428700001","https://ousar.lib.okayama-u.ac.jp/56915","10.1111/ggr.12280"
    "Iyasu Getachew;Belay|Ryoji;Tanaka|Hiroshi;Kitagawa|Katsura;Kobayashi|Eizo;Nakamura|","Origin of ocean island basalts in the West African passive margin without mantle plume involvement","Nature Communications","20411723","2019-07","10","1","3022","","isVersionOf https://doi.org/10.1038/s41467-019-10832-7","31289264","000474506700008","http://escholarship.lib.okayama-u.ac.jp/56914","10.1038/s41467-019-10832-7"