アイソトポマーの計測・解析技術開発による物質循環解析

2015 Fiscal Year Annual Research Report

• Project/Area Number: 23224013
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: 吉田 尚弘 東京工業大学, 大学院総合理工学研究科, 教授 (60174942)
• Co-Investigator(Kenkyū-buntansha): 南部 伸孝 上智大学, 理工学部, 教授 (00249955) ; ダニエラチェ セバスチィアン 上智大学, 理工学部, 助教 (00595754) ; ジルベルト アレキシー 東京工業大学, 地球生命研究所, 特任助教 (20726955) ; 豊田 栄 東京工業大学, 大学院総合理工学研究科, 准教授 (30313357) ; 吉川 知里 国立研究開発法人海洋研究開発機構, その他部局等, 研究員 (40435839) ; 山田 桂太 東京工業大学, 大学院総合理工学研究科, 准教授 (70323780) ; 服部 祥平 東京工業大学, 大学院総合理工学研究科, 助教 (70700152)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 物質循環 / アイソトポマー / 環境計測 / 理論計算 / 数値モデリング

Outline of Annual Research Achievements

重要なC3化合物のアイソトポマー計測法を進展させた。プロパンのアイソトポマー計測法を実用化し、熱分解起源と非生物起源のプロパンを明確に区別できる可能性を見出した。生体代謝物として重要なピルビン酸のアイソトポマー計測法を開発した。アセトンのオフライン計測で得られた値を基準にオンラインアイソトポマー計測法を開発した。
地球温暖化関連物質であるN2Oおよび硝酸塩の酸素非質量依存同位体分別を高感度で測定する方法を開発し自動化した。N2Oについては、15Nの分子内同位体分布計測法を自動化して対流圏大気中N2Oの変化傾向を明らかにし、国際共同研究によりアイソトポマー標準物質の較正、配布を行った。硫化カルボニル(OCS)の硫黄同位体比分析法を開発し、大気OCSの硫黄同位体比を分析した。成層圏過程を組み合わせたモデルを用いて、OCSが成層圏硫酸の起源とであることを明らかにした。また本手法でOCSの微生物分解時の硫黄同位体分別係数を決定した。
大気分子の光解離反応および同位体濃縮の定量化を高精度理論計算のもとで行った。半古典凍結ガウス波束発展法（SC-FGP）に基づく非断熱遷移（NT）を考慮した方法を用いて光化学に関連する分子紫外線吸収スペクトルを調べた。コード開発し、2原子分子用コードでドップラー幅を考慮して紫外線吸収スペクトルの温度依存性を得た。このコードを用い、SO、CO及びO2分子の計算を行った。また、ZN-TSH方法によるH2SO4と紫外線における光解離反応の計算によってこれまで未確認の生成物を発見した。
昨年度構築した海洋N2Oアイソトポマーモデルを、0次元から鉛直１次元へ拡張した。北西部北太平洋の亜寒帯と亜熱帯の２つの時系列定点に適用してアイソトポマー分析結果との比較を行うことで、モデルが好気的外洋域におけるN2O分布を再現できることを確認した。

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Isotopically enriched ammonium shows high nitrogen turnover in the pile top zone of dairy manure compost (2016)
  • Author(s): K. Maeda, S. Toyoda, M. Yano, S. Hattori, M. Fukasawa, K. Nakajima, and N. Yoshida
  • Journal Title: Biogeosciences Volume: 13 Pages: 1341-1349
  • DOI: doi:10.5194/bg-13-1341-2016
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Tracking the migration of the Indian continent using the carbonate clumped isotope technique on Phanerozoic soil carbonates (2016)
  • Author(s): Prosenjit Ghosh, Mikhail V. Vasiliev, Parthasarathi Ghosh, Soumen Sarkar, Sampa Ghosh, Keita Yamada, Yuichiro Ueno, Naohiro Yoshida & Christopher J. Poulsen
  • Journal Title: Scientific Reports Volume: 6 Pages: 22187
  • DOI: DOI: 10.1038/srep22187
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Isotopocule characterization of N2O dynamics during simulated wastewater treatment under oxic and anoxic conditions (2016)
  • Author(s): Azzaya Tumendelger, Sakae Toyoda, Naohiro Yoshida, Hiroshi Shiomi, Rina Kouno
  • Journal Title: Geochemical Journal Volume: 50 Pages: 105-121
  • DOI: doi:10.2343/geochemj.2.0390
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Use of a size-resolved 1-D resuspension scheme to evaluate resuspended radioactive material associated with mineral dust particles from the ground surface (2016)
  • Author(s): Masahide Ishizuka, Masao Mikami, Taichu Y Tanaka, Yasuhito Igarashi, Kazuyuki Kita, Yutaka Yamada; Naohiro Yoshida, Sakae Toyoda, Yukihiko Satou, Takeshi Kinase, Kazuhiko Ninomiya, Atsushi Shinohara
  • Journal Title: Journal of Environmental Radioactivity Volume: 印刷中 Pages: 印刷中
  • DOI: doi:10.1016/j.jenvrad.2015.12.023
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Measurement of position-specific 13C isotopic composition of propane at the nanomole level (2016)
  • Author(s): Alexis Gilbert; Keita Yamada; Konomi Suda; Yuichiro Ueno; Naohiro Yoshida
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 177 Pages: 205-216
  • DOI: doi:10.1016/j.gca.2016.01.017
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Sulfur isotopic fractionation of carbonyl sulfide during degradation by soil bacteria (2016)
  • Author(s): Kazuki Kamezaki, Shohei Hattori, Takahiro Ogawa, Sakae Toyoda, Hiromi Kato, Yoko Katayama, and Naohiro Yoshida
  • Journal Title: Environ. Sci. Technol. Volume: 50 Pages: pp3537-3544
  • DOI: 10.1021/acs.est.5b05325
  • Peer Reviewed
• [Journal Article] Hadal biosphere: insight into the microbial ecosystem in the deepest ocean on Earth (2015)
  • Author(s): Takuro Nunoura, Yoshihiro Takaki, Miho Hirai, Shigeru Shimamura, Akiko Makabe, Osamu Koide, Tohru Kikuchi, Junichi Miyazaki, Keisuke Koba, Naohiro Yoshida, Michinari Sunamura, and Ken Takai
  • Journal Title: Proceedings of the National Academy of Sciences of the United States of America Volume: 112 Pages: E1230-E1236
  • DOI: doi: 10.1073/pnas.1421816112
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Isotopocule analysis of biologically produced nitrous oxide in various environments (2015)
  • Author(s): Sakae Toyoda, Naohiro Yoshida, and Keisuke Koba
  • Journal Title: Mass Spectrometry Reviews Volume: - Pages: -
  • DOI: DOI: 10.1002/mas.21459
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] N2O production, a widespread trait in fungi (2015)
  • Author(s): Koki Maeda, Ayme Spor, Veronique Edel-Hermann, Cecile Heraud, Marie-Christine Breuil, Florian Bizouard, Sakae Toyoda, Naohiro YoshidaChristian Steinberg & Laurent Philippot
  • Journal Title: Scientific Reports Volume: 5 Pages: 9697
  • DOI: doi:10.1038/srep09697
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Rainwater, soil water, and soil nitrate effects on oxygen isotope ratios of nitrous oxide produced in a green tea Camellia sinensis field in Japan (2015)
  • Author(s): Yun Zou, Yuhei Hirono, Yosuke Yanai, Shohei Hattori, Sakae Toyoda, Naohiro Yoshida
  • Journal Title: Rapid Communications in Mass Spectrometry Volume: 29 Pages: 891-900
  • DOI: DOI: 10.1002/rcm.7176
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Nitrogen isotope ratios of nitrate and N* anomalies in the subtropical South Pacific (2015)
  • Author(s): Yoshikawa, C., A. Makabe, T. Shiozaki, S. Toyoda, O. Yoshida, K. Furuya, and N. Yoshida
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 16 Pages: 1439-1448
  • DOI: doi:10.1002/2014gc005678
• [Journal Article] Insight into nitrous oxide production processes in the western North Pacific based on a marine ecosystem isotopomer model (2015)
  • Author(s): Chisato Yoshikawa, Hitomi Abe, Maki N. Aita, Florian Breider, Keichi Kuzunuki, Sakae Toyoda, Nanako O. Ogawa, Hisami Suga, Naohiko Ohkouchi, Sebastian O. Danielache, Masahide Wakita, Makio C. Honda, Naohiro Yoshida
  • Journal Title: Journal of Oceanography Volume: - Pages: 1-18
  • DOI: DOI:10.1007/s10872-015-0308-2
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Origin and fluxes of nitrous oxide along a latitudinal transect in 4 western North Pacific: controls and regional significance (2015)
  • Author(s): Florian Breider, Chisato Yoshikawa, Hitomi Abe, Sakae Toyoda, Naohiro Yoshida
  • Journal Title: Global Biogeochemical Cycles Volume: 29 Pages: -
  • DOI: DOI:10.1002/2014GB004977
  • Int'l Joint Research
• [Journal Article] Photoabsorption cross-section measurements of S-32, S-33, S-34, and S-36 sulfur dioxide from 190 to 220 nm (2015)
  • Author(s): Yoshiaki Endo, Sebastian O. Danielache, Yuichiro Ueno, Shohei Hattori, Matthew S. Johnson, Naohiro Yoshida, Henrik G. Kjaergaard
  • Journal Title: J. Geophys. Res.-Atmosphere Volume: 120 Pages: 2546-2557
  • DOI: DOI: 10.1002/2014JD021671
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The marine environments encompassing the Neoproterozoic glaciations: Evidence from C, Sr and Fe isotope ratios in the Hecla Hoek Supergroup in Svalbard (2015)
  • Author(s): Miyuki Tahata, Yusuke Sawaki, Kazumi Yoshiya, Manabu Nishizawa, Tsuyoshi Komiya, Takafumi Hirata, Naohiro Yoshida, Shigenori Maruyama, Brian F. Windley
  • Journal Title: Precambrian Research Volume: 263 Pages: 19-42
  • DOI: doi:10.1016/j.precamres.2015.03.007
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Position-Specific Isotope Analysis of Xanthines: a 13C Nuclear Magnetic Resonance method to determine the 13C intramolecular composition at natural abundance (2015)
  • Author(s): Didier Gbe Diomande, Estelle Martineau, Alexis Gilbert, Pierrick Nun, Ariaki Murata, Keita Yamada, Naoharu Watanabe, Illa Tea, Richard John Robins, Naohiro Yoshida, Gerald Stanislas Remaud
  • Journal Title: Geochemistry, Geophysics, Geosystems (G-Cubed) Volume: 16 Pages: 1439-1448
  • DOI: DOI: 10.1002/2014GC005678
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Nitrogen isotope ratios of nitrate and N* anomalies in the subtropical South Pacific (2015)
  • Author(s): Chisato Yoshikawa, Akiko Makabe, Takuhei Shiozaki, Sakae Toyoda, Osamu Yoshida, Ken Furuya and Naohiro Yoshida
  • Journal Title: Geochemistry, Geophysics, Geosystems (G-Cubed) Volume: 16 Pages: 1439-1448
  • DOI: DOI: 10.1002/2014GC005678
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Decoding redox evolution before oxygenic photosynthesis based on the sulfur-mass independent fractionation (S-MIF) record (2015)
  • Author(s): Ueno, Yuichiro; Danielache, Sebastian; Yoshida, Naohiro
  • Journal Title: Origins of Life and Evolution of Biospheres Volume: 45 Pages: 371-374
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Origin and fluxes of nitrous oxide along a latitudinal transect in western North Pacific: Controls and regional significance (2015)
  • Author(s): Breider, Florian; Yoshikawa, Chisato; Abe, Hitomi; Toyoda, Sakae; Yoshida, Naohiro
  • Journal Title: Global Biogeochemical Cycles Volume: 29 Pages: 1014-1027
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Three-step modernization of the ocean: Modeling of carbon cycles and the revolution of ecological systems in the Ediacaran/Cambrian periods (2015)
  • Author(s): Tahata, M., Sawaki, Y., Ueno, Y., Nishizawa, M., Yoshida, N., Ebisuzaki, T., Komiya, T., Maruyama, S
  • Journal Title: Geoscience Frontiers Volume: 6 Pages: 121-136
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Analytical method for simultaneous determination of bulk and intramolecular 13C-isotope compositions of acetic acid (2015)
  • Author(s): Nimmanwudipong T., Gilbert A., Yamada K., Yoshida N
  • Journal Title: Rapid Commun. Mass Spectrom. Volume: 29 Pages: 2337-2340
  • DOI: DOI: 10.1002/rcm.7398
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Measurement of natural carbon isotopic composition of acetone in human urine (2015)
  • Author(s): Yamada K., Ohishi K., Gilbert A., Akasaka M., Yoshida N., Yoshimura R.
  • Journal Title: Anal. Bioanal. Chem. Volume: 408 Pages: 1597-1607
  • DOI: DoI: 10.1007/s00216-015-9268-z
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Determination of intramolecular 13C isotope distribution of pyruvate by headspace solid phase microextraction-gas chromatography/pyrolysis-gas chromatography/combustion-isotope ratio mass spectrometry (HSSPME-GC/Py-GC/C-IRMS) method (2015)
  • Author(s): Tarin Nimmanwudipong, Zhang Naizhong, Alexis Gilbert, Keita Yamada and Naohiro Yoshida
  • Journal Title: Journal of Analytical & Bioanalytical Techniques Volume: 7 Pages: 100293
  • DOI: doi:10.4172/2155-9872.1000293
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 分子内同位体分布計測による新たな物質循環解析 (2016)
  • Author(s): 吉田 尚弘
  • Organizer: 第14回同位体科学会研究会
  • Place of Presentation: 産総研 臨海副都心センター（東京お台場）
  • Year and Date: 2016-03-11 – 2016-03-11
  • Invited
• [Presentation] ab initio分子動力学法によるHSOラジカルの光解離反応の解明 (2016)
  • Author(s): 太田亜由美, 江河翔太, S. O. Danielache, 南部伸孝
  • Organizer: 第14回同位体科学会研究会
  • Place of Presentation: 産総研 臨海副都心センター（東京お台場）
  • Year and Date: 2016-03-11 – 2016-03-11
• [Presentation] Seasonal variation of triple oxygen isotopic composition (Δ17O) of oxy-anions in the atmosphere at Dumont d’Urville, coastal Antarctica (2016)
  • Author(s): Sakiko Ishino, Shohei Hattori
  • Organizer: IPICS2016
  • Place of Presentation: C3 Convention Centre,HOBART, AUSTRALIA
  • Year and Date: 2016-03-07 – 2016-03-11
  • Int'l Joint Research
• [Presentation] 北極海における溶存メタンおよび一酸化二窒素の濃度と isotopoculeの分布 (2016)
  • Author(s): 町田敏暢、澤庸介、松枝秀和、丹羽洋介、坪井一寛、勝又啓一、笹川基樹、村山昌平、森本真司、豊田栄、青木周司
  • Organizer: GRENE北極気候変動研究事業 研究成果報告会
  • Place of Presentation: 国立国語研究所（立川市）
  • Year and Date: 2016-03-03 – 2016-03-04
• [Presentation] 北極域における大気中N2O isotopoculeの時空間分布 (2016)
  • Author(s): 豊田栄、渡辺由羽馬、町田敏暢、遠嶋康徳、森本真司、Doug Worthy、石島健太郎、吉田尚弘
  • Organizer: GRENE北極気候変動研究事業 研究成果報告会
  • Place of Presentation: 国立国語研究所（立川市）
  • Year and Date: 2016-03-03 – 2016-03-04
• [Presentation] Theoretical study of photoisomerization between 1,3-cyclohexadiene and 1,3,5-cis-hexatriene in both gas and liquid phases (2016)
  • Author(s): A. Ohta, O. Kobayashi, S. O. Danielache, S. Nanbu
  • Organizer: The Seventh Asia-Pacific Conference of Theoretical and Computational Chemistry, (APCTCC 7)
  • Place of Presentation: Ambassador Hotel Kaohsiung, Taiwan
  • Year and Date: 2016-01-25 – 2016-01-28
  • Int'l Joint Research / Invited
• [Presentation] A computational approach to diatomic ultraviolet spectra applied to planetary atmospheres (2016)
  • Author(s): S. O. Danielache, S. Nanbu, A. Kondorskiy, A, Fujiwara
  • Organizer: The Seventh Asia-Pacific Conference of Theoretical and Computational Chemistry, (APCTCC 7)
  • Place of Presentation: Ambassador Hotel Kaohsiung, Taiwan
  • Year and Date: 2016-01-25 – 2016-01-28
• [Presentation] 多様な同位体分子種トレーサーが拓く物質循環像 (2015)
  • Author(s): 吉田 尚弘、服部祥平
  • Organizer: 第5回同位体環境学シンポジウム
  • Place of Presentation: 総合地球環境学研究所（京都）
  • Year and Date: 2015-12-25 – 2015-12-25
  • Invited
• [Presentation] Theoretical study of photoisomerization between 1,3-cyclohexadiene and 1,3,5-cis-hexatriene (2015)
  • Author(s): A. Ohta, O. Kobayashi, S. O. Danielache, S. Nanbu
  • Organizer: The international Chemical Congress of Pacific Basin Societies (Pacifichem 2015)
  • Place of Presentation: ハワイコンベンションセンター及びホノルル内ホテル7会場 Honolulu, HAWAII
  • Year and Date: 2015-12-15 – 2015-12-20
• [Presentation] Spacio-temporal distributions of atmospheric nitrous oxide and its isotopocules in the Arctic region (2015)
  • Author(s): Toyoda, S., T. Machida, Y. Tohjima, S. Morimoto, D. Worthy, K. Ishijima, and N. Yoshida
  • Organizer: 第6回極域科学シンポジウム
  • Place of Presentation: 国立極地研究所（立川市）
  • Year and Date: 2015-11-16 – 2015-11-19
• [Presentation] 大気中一酸化二窒素の同位体分子種（isotopocule）の長期観測 (2015)
  • Author(s): 豊田 栄、町田 敏暢、遠嶋 康徳、森本 真司、Doug Worthy、 石島 健太郎、吉田 尚弘
  • Organizer: 日本気象学会2015年度秋季大会
  • Place of Presentation: 京都テルサ
  • Year and Date: 2015-10-28 – 2015-10-30
• [Presentation] 赤道上空成層圏におけるN2O isotopocule比の高度分布 (2015)
  • Author(s): 豊田栄、吉田尚弘、森本真司、青木周司、中澤高清、菅原敏、石戸谷重之、稲飯洋一、長谷部文雄、池田忠作、本田秀之、石島健太郎
  • Organizer: 大気化学討論会2015
  • Place of Presentation: 東京工業大学大岡山キャンパス
  • Year and Date: 2015-10-19 – 2015-10-21
• [Presentation] 国際宇宙ステーション搭載超伝導サブミリ波サウンダ(SMILES)による成層圏・下部中間圏におけるCH3CNの観測 (2015)
  • Author(s): 平川貴士、栗林康太、吉田尚弘、笠井康子
  • Organizer: 大気化学討論会2015
  • Place of Presentation: 東京工業大学大岡山キャンパス
  • Year and Date: 2015-10-19 – 2015-10-21
• [Presentation] 長野県、中房温泉バイオマット中生態系形成過程における脂肪酸炭素同位体比解析 (2015)
  • Author(s): 長谷川 潤, 中川 麻悠子, 森 宙史, 黒川 顕, 山田 桂太, 吉田 尚弘
  • Organizer: 日本微生物生態学会第30回大会
  • Place of Presentation: 土浦亀城プラザ
  • Year and Date: 2015-10-17 – 2015-10-20
• [Presentation] 溶存・懸濁態炭素に着目した温度成層湖である涌池の好気・嫌気環境における炭素循環の解析 (2015)
  • Author(s): 丹 佑太、中川 麻悠子、大八木 英夫、豊田 栄、吉田 尚弘
  • Organizer: 日本陸水学会第80回大会
  • Place of Presentation: 北海道大学函館キャンパス
  • Year and Date: 2015-09-26 – 2015-09-29
• [Presentation] 種々の大気試料中N2Oのisotopocule比測定用自動前処理装置の開発 (2015)
  • Author(s): 豊田栄、吉田尚弘
  • Organizer: 日本地球化学会第62回年会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2015-09-16 – 2015-09-18
• [Presentation] 海洋生態系－同位体分子種モデルを用いた西部北太平洋におけるN2O生成プロセスの解明 (2015)
  • Author(s): 吉川知里、笹井義一、本多牧生、眞壁明子、豊田栄、吉田尚弘、小川奈々子、大河内直彦
  • Organizer: 日本地球化学会第62回年会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2015-09-16 – 2015-09-18
• [Presentation] 北太平洋亜寒帯域における亜硝酸塩同位体比を用いたN2O生成過程の解析 (2015)
  • Author(s): 松嶋修一郎、豊田栄、布浦拓郎、眞壁明子、吉田尚弘
  • Organizer: 日本地球化学会第62回年会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2015-09-16 – 2015-09-18
• [Presentation] 硫化カル ボニル微生物分解時の硫黄同位体分別とその大気化学への応用 (2015)
  • Author(s): 亀崎和輝、、服部祥平 、小川貴弘、△石野咲子、豊田栄、加藤広海 、片山葉子、吉田尚弘
  • Organizer: 日本地球化学会第62回年会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2015-09-16 – 2015-09-18
• [Presentation] 非断熱ab initio分子動力学計算によるシクロヘキサジエン/ヘキサトリエン間の光異性化反応の解明 (2015)
  • Author(s): 太田亜由美, 小林理, Sebastian O. Danielache, 南部伸孝
  • Organizer: 化学反応経路探索のニューフロンティア2015
  • Place of Presentation: 東京品川区立総合区民会館きゅりあん
  • Year and Date: 2015-09-15 – 2015-09-15
• [Presentation] Continuous measurements of xCO2 and xCH4 in the seawater and overlying air in the western Arctic Ocean (2015)
  • Author(s): Daisuke Sasano, Masao Ishii, Naohiro Kosugi, Akihiko Murata, Hiroshi Uchida, ○Kushi Kudo, Sakae Toyoda, Keita Yamada, Naohiro Yoshida, Hisayuki Yoshikawa-Inoue, Shigeto Nishino and Takashi Kikuchi
  • Organizer: The 18th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques
  • Place of Presentation: The Robert Paine Scripps Forum（La Jolla, CA）
  • Year and Date: 2015-09-13 – 2015-09-17
  • Int'l Joint Research
• [Presentation] Position-specific 13C isotope composition of non-methane hydrocarbons (2015)
  • Author(s): A.GILBERT,K.SUDA,K.YAMADA, Y.UENOAND N.YOSHIDA
  • Organizer: Goldschmidt 2015
  • Place of Presentation: Prague Congress Centre(チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] Extremely isotopically enriched ammonium shows high nitrogen turnover in the pile top zone of dairy manure compost (2015)
  • Author(s): K.MAEDA, S.TOYODA, M.YANO,S.HATTORI, M.FUKASAWA K.NAKAJIMA AND N.YOSHIDA
  • Organizer: Goldschmidt 2015
  • Place of Presentation: Prague Congress Centre(チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] Position specific analysis of nitrogen and carbon isotopes in molecules of biogeochemical interests (2015)
  • Author(s): NAOHIRO YOSHIDA
  • Organizer: Goldschmidt 2015
  • Place of Presentation: Prague Congress Centre(チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] 有機分子の炭素安定同位体計測の最前線 (2015)
  • Author(s): 山田 桂太、吉田 尚弘
  • Organizer: 表示・起源分析技術研究懇談会第13回講演会
  • Place of Presentation: 東京工業大学大岡山キャンパス
  • Year and Date: 2015-06-30 – 2015-06-30
• [Presentation] Sulfur isotopic fractionation in carbonyl sulfide during microbial degradation (2015)
  • Author(s): KAMEZAKI, Kazuki, HATTORI Shohei, OGAWA Takahiro, ISHINO Sakiko, TOYODA Sakae,KATO Hiromi, KATAYAMA Yoko,YOSHIDA Naohiro
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ（東京）
  • Year and Date: 2015-05-24 – 2015-05-28
  • Int'l Joint Research
• [Presentation] Seasonal variations of nitrogen and oxygen isotopic signature of atmospheric nitrate in coastal Antarctica (2015)
  • Author(s): Ishino, S., Hattori, S., Caillon, N., Barbero, A., Gautier, E., Jourdain, B., Preunkert, S., Legrand, M., Yoshida, N., Savarino, J.
  • Organizer: Japan Geoscience Union Meeting2015
  • Place of Presentation: 幕張メッセ（東京）
  • Year and Date: 2015-05-24 – 2015-05-28
  • Int'l Joint Research
• [Presentation] Relationship between CH4 and CO2 in the surface seawater in the western Arctic Ocean (2015)
  • Author(s): Sasano, D., M. Ishii, N. Kosugi, A. Murata, H. Uchida, S. Toyoda, K. Yamada, K. Kudo,, N. Yoshida, T. Mifune, M. Yamamoto-Kawai, H. Yoshikawa-Inoue, S. Nishino, T. Kikuchi
  • Organizer: The 4th International Symposium on the Arctic Research
  • Place of Presentation: 富山国際会議場
  • Year and Date: 2015-04-27 – 2015-04-30
  • Int'l Joint Research