論文

• Sakae Toyoda, Midori Yano, S. Nishimura, H. Akiyama, A. Hayakawa, Keisuke Koba, S. Sudo, K. Yagi, Akiko Makabe, Yoshifumi Tobari, N. O. Ogawa, Nao Ohkouch, Keita Yamada, Naohiro Yoshida. Characterization and production and consumption processes of N2O emitted from temperate agricultural aoils determined via isotopomer ratio analysis, Global Biogeochem. Cycles, Vol. 17, May 2011.

国際会議発表 (査読なし・不明)

• Chisato Yoshikawa, Akiko Makabe, Yohei Matsui, Sakae Toyoda, Makio Honda, Naohiko Ohkouchi. Nitrate isotopes in the Bay of Bengal, JpGU-AGU Joint Meeting 2020: Virtual, July 2020.
• Y. Takano, Y. Chikaraishi, N. Ohkouchi, Naohiro Yoshida. On the role of pyruvate family products for archaea: insight from 13C-depleted branched-chain amino acids, ISI2014, July 2014.
• Akiko Makabe, Keisuke Koba, Chikage Yoshimizu, I.chiro Tayasu, N. O. Ogawa, Naohiko Ohkouchi, Sakae Toyoda, Naohiro Yoshida, Toshi Nagata. Fate of atmospheric nitrate and nitrogen biogeochemical processes in Lake Biwa elucidated by multiple oxygen isotopes, 2012 ASLO Aquatic Sciences Meeting, July 2012.
• Akiko Makabe, Keisuke Koba, Chikage Yoshimizu, Ichiro Tayasu, Nanako O. Ogawa, Naohiko Ohkouchi, Sakae Toyoda, Toshi Nagata, Naohiro Yoshida. Oxygen isotopic composition of nitrous oxide produced in Lake Biwa, International Symposium on Isotope Ecology 2010 in Kyoto, COOP Inn Kyoto, Nov. 2010.

国内会議発表 (査読なし・不明)

• 吉川知里, 眞壁明子, 松井洋平, 豊田栄, 本多牧生, 横川太一, 布浦拓郎, 大河内直彦. 東部インド洋における硝酸の窒素酸素同位体比, 日本地球化学会年会, Nov. 2020.
• 和田亮一, 坂井三郎, 二階堂雅人, 相原光人, 大河内直彦, 岡田典弘, 山田桂太, 吉田尚弘. 耳石の同位体分析によるシーラカンスの生息水深推定, 2010年度日本地球化学会第57回年会, 2010年度日本地球化学会第57回年会講演要旨集, 日本地球化学会, p. 125, Sept. 2010.

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