@article{CTT100705509,
  author = {Takuro Nunoura and Yoshihiro Takaki and Miho Hirai and Shigeru Shimamura and Akiko Makabe and Osamu Koide and Tohru Kikuchi and Junichi Miyazaki and Keisuke Koba and Naohiro Yoshida and Michinari Sunamura and Ken Takai},
  title = {Hadal biosphere: insight into the microbial ecosystem in the deepest ocean on Earth},
  journal = {},
  year = 2015,
}

@article{CTT100668292,
  author = {Midori Yano and Sakae Toyoda and T. Tokida and K. Hayashi and T. Hasegara and A. Makabe and Keisuke Koba},
  title = {Isotopomer analysis of production, consumption and soil-to-atmosphere emission processes of N2O at the beginning of paddy field irrigation},
  journal = {Soil Biology & Biochemistry},
  year = 2013,
}

@article{CTT100656994,
  author = {M. Nishizawa and Kisuke Koba and M. Kaneko and S. Hirao and J. Ishibashi and T. Yamanaka and T. Shibuya and T. Kikuchi and M. Hirai and J. Miyazaki and T. Nunoura and K. Takai and M. Nishizawa and Keisuke Koba and Akiko Makabe and Naohiro Yoshida and M. Kaneko and S. Hirao and J. Ishibashi and T. Yamanaka and T. Shibuya and T. Kikuchi and M. Hirai and J. Miyazaki and T. Nunoura and K. Takai},
  title = {Nitrification-driven forms of nitrogen metabolism in microbial mat communities thriving along an ammonium-enriched subsurface geothermal stream.},
  journal = {Geochimica et Cosmochimica Acta},
  year = 2013,
}

@article{CTT100639010,
  author = {Keisuke Koba and Yunting Fang and Jiangming Mo and Wei Zhang and Xiankai Lu and Lei Liu and Tao Zhang and Yu Takebayashi and Sakae Toyoda and Naohiro Yoshida and Keisuke Suzuki and Muneoki Yoh and Keishi Senoo},
  title = {The 15N natural abundance of the N lost from an N-saturated subtropical forest in southern China},
  journal = {Journal of Geophsical Research},
  year = 2012,
}

@article{CTT100668285,
  author = {Nobuhito Ohte and Ichiro Tayasu and Ayato Kohzu and Chikage Yoshimizu and Ken'ichi Osaka and Akiko Makabe and Keisuke Koba and Naohiro Yoshida and Toshi Nagata},
  title = {Correction to “Spatial distribution of nitrate sources of rivers in the Lake Biwa watershed, Japan: Controlling factors revealed by nitrogen and oxygen isotope values”},
  journal = {Water Resouces Research},
  year = 2012,
}

@article{CTT100644455,
  author = {Nakagawa Mayuko and Yuichiro Ueno and Shohei Hattori and Maki Umemura and Akihiko Yagi and Ken Takai and Keisuke Koba and Yuji Sasaki and Akiko Makabe and Naohiro Yoshida},
  title = {Seasonal change in microbial sulfur cycling in monomictic Lake Fukami-ike, Japan},
  journal = {Limnology & Oceanography},
  year = 2012,
}

@article{CTT100633712,
  author = {Sakae Toyoda and Midori Yano and S. Nishimura and H. Akiyama and A. Hayakawa and Keisuke Koba and S. Sudo and K. Yagi and Akiko Makabe and Yoshifumi Tobari and N. O. Ogawa and Nao Ohkouch and Keita Yamada and Naohiro Yoshida},
  title = {Characterization and production and consumption processes of N2O emitted from temperate agricultural aoils determined via isotopomer ratio analysis},
  journal = {Global Biogeochem. Cycles},
  year = 2011,
}

@article{CTT100633733,
  author = {Sasaki, Y. and Keisuke Koba and M. Yamamoto and Akiko Makabe and Yuichiro Ueno and Mayuko Nakagawa and Sakae Toyoda and Naohiro Yoshida and M. Yoh},
  title = {Biogeochemistry of nitrous oxide in Lake Kizaki, Japan, elucidated by nitrous oxide isotopomer analysis},
  journal = {J. Geophys. Res.},
  year = 2011,
}

@article{CTT100601103,
  author = {Nobuhito Ohte and Ichiro Tayasu and Ayato Kohzu and Chikage Yoshimizu and Kenichi Osaka and Akiko Makabe and Keisuke Koba and Naohiro Yoshida and Toshi Nagata},
  title = {Spatial distribution of nitrate sources of rivers in the Lake Biwa watershed, Japan: Controlling factors revealed by nitrogen and oxygen isotope values},
  journal = {Water Resources Research},
  year = 2010,
}

@article{CTT100592099,
  author = {Hiroyuki Kimura and Kousuke Mori and Hiroaki Nashimoto and Shohei Hattori and Keita Yamada and Keisuke Koba and Naohiro Yoshida and Kenji Kato},
  title = {Biomass production and energy source of thermophiles in a Japanese alkaline geothermal pool},
  journal = {Environmental Microbiology},
  year = 2010,
}

@article{CTT100600210,
  author = {Yoshifumi Tobari and Keisuke Koba and Keitaro Fukushima and Naoko Tokuchi and Nobuhito Ohte and Ryunosuke Tateno and Sakae Toyoda and Takahito Yoshioka and Naohiro Yoshida},
  title = {Contribution of atmospheric nitrate to stream-water nitrate in Japanese coniferous forests revealed by oxygen isotope ratio of nitrate},
  journal = {Rapid Communications in Mass Spectrometry},
  year = 2010,
}

@article{CTT100592094,
  author = {Keisuke Koba and K. Osaka and Yoshifumi Tobari and Sakae Toyoda and N. Ohte and Katsuyama and Suzuki and M. Itoh and H. Yamagishi and M. Kawasaki and S. Kim and Naohiro Yoshida and T. Nakajima},
  title = {Biogeochemistry of nitrous oxide in roundwater in a forested ecosystem elucidated by nitrous oxide isotopomer measurements},
  journal = {Geochimica et Cosmochimica Acta,},
  year = 2009,
}

@article{CTT100589510,
  author = {Sakae Toyoda and Hiroyuki Iwai and Keisuke Koba and Naohiro Yoshida},
  title = {Isotopomeric analysis of N2O dissolved in a river in the Tokyo metropolitan area},
  journal = {Rapid Communications in Mass Spectrometry},
  year = 2009,
}

@article{CTT100554048,
  author = {Hiroaki Yamagishi and Marian. B. Westley and Brian N. Popp and Sakae Toyoda and Naohiro Yoshida and Shuichi Watanabe and Keisuke Koba and Yasuhiro Yamanaka},
  title = {Role of nitrification and denitrification on the nitrous oxide cycle in the eastern tropical North Pacific and Gulf of California.},
  journal = {J. Geophys. Res.-Biogeosciences},
  year = 2007,
}

@inproceedings{CTT100747776,
  author = {Thuan and Nguyen Cong and Keisuke Koba and Midori Yano and Akiko Makabe and Co Thi Kinh and Akihiko Terada and Sakae Toyoda and Naohiro Yoshida and Yotaro Tanaka and Masanori Katsuyama and Muneoki Yoh},
  title = {Integrated approaches of N2/Ar measurement, stable isotopic and molecular techniques and investigating dissolved organic matter characteristics to evidence the denitrification in river},
  booktitle = {},
  year = 2016,
}

@inproceedings{CTT100786686,
  author = {Midori Yano and Sakae Toyoda and Takeshi Tokida and Kentaro Hayashi and Toshihiro Hasegawa and Hirohumi Nakamura and Akiko Makabe and Keisuke Koba and Naohiro Yoshida},
  title = {Large contributions of nitrification and fungal denitrification in N2O productions in drained paddy fields exposed to CO2 of current and future atmospheric concentrations},
  booktitle = {},
  year = 2013,
}

@inproceedings{CTT100786742,
  author = {Akiko Makabe and Keisuke Koba and Chikage Yoshimizu and I.chiro Tayasu and N. O. Ogawa and Naohiko Ohkouchi and Sakae Toyoda and Naohiro Yoshida and Toshi Nagata},
  title = {Fate of atmospheric nitrate and nitrogen biogeochemical processes in Lake Biwa elucidated by multiple oxygen isotopes},
  booktitle = {},
  year = 2012,
}

@inproceedings{CTT100786721,
  author = {Nozomi Suzuki and Keisuke Koba and M Itoh and K. Osaka and Nobuhito Ohte and Yoshifumi Tobari and Keita Yamada and Naohiro Yoshida},
  title = {Isotopic fractionation during methane uptake in temperate forest soil},
  booktitle = {},
  year = 2012,
}

@inproceedings{CTT100786705,
  author = {矢野 翠 and 豊田 栄 and 常田岳志 and 林健太郎 and 長谷川利拡 and 木庭啓介 and 吉田尚弘},
  title = {アイソトポマー比を用いた水田入水時における一酸化二窒素生成、放出過程の解析},
  booktitle = {},
  year = 2012,
}

@inproceedings{CTT100648634,
  author = {Mayuko Nakagawa and Yuichiro Ueno and Shohei Hattori and Ken Takai and Keisuke Koba and Yuuji Sasaki and Akiko Makabe and Maki Umemura and Akihiko Yagi and Naohiro Yoshida},
  title = {Seasonal change of microbial sulfur cycle in monomictic lake Fukami-ike, Japan},
  booktitle = {},
  year = 2012,
}

@inproceedings{CTT100787264,
  author = {矢野 翠 and 豊田 栄 and 林健太郎・常田岳志 and 松島未和 and 和穎朗太 and 南川和則 and 長谷川利拡 and 木庭啓介 and 吉田尚弘},
  title = {高CO2条件下の水田土壌におけるN2O生成・消滅過程の同位体比を用いた解析},
  booktitle = {},
  year = 2011,
}

@inproceedings{CTT100793848,
  author = {Akiko Makabe and Keisuke Koba and Chikage Yoshimizu and Ichiro Tayasu and Nanako O. Ogawa and Naohiko Ohkouchi and Sakae Toyoda and Toshi Nagata and Naohiro Yoshida},
  title = {Oxygen isotopic composition of nitrous oxide produced in Lake Biwa},
  booktitle = {},
  year = 2010,
}

@inproceedings{CTT100793835,
  author = {Shohei Hattori and Hiroaki Nashimoto and Hiroyuki Kimura and Keisuke Koba and Keita Yamada and Mikio Shimizu and Hiroshi Watanabe and Muneoki Yoh and Naohiro Yoshida},
  title = {Hydrogen and carbon isotope fractionation by thermophilic hydrogenotrophic methanogens from a geothermal aquifer under coculture with fermenters},
  booktitle = {},
  year = 2010,
}

@inproceedings{CTT100620368,
  author = {Mayuko Nakagawa and Yuichiro Ueno and Shohei Hattori and Maki Umemura and Akihiko Yagi and Ken Takai and Keisuke Koba and Akiko Makabe and Yuji Sasaki and Naohiro Yoshida},
  title = {Sulfur mass balances and microbial metabolisms in a sulfur rich monomictic lake: A case study of the Lake Fukami-ike},
  booktitle = {},
  year = 2010,
}

@inproceedings{CTT100593262,
  author = {豊田 栄 and 矢野 翠 and 早川 敦 and 秋山博子 and 西山誠一 and 須藤重人 and 木庭啓介 and 山田桂太 and 吉田尚弘},
  title = {アイソトポマー比を用いた農耕土壌起源N２Oのキャラクタリゼーションおよび全球放出推定},
  booktitle = {第15回大気化学討論会講演要旨集},
  year = 2009,
}

@inproceedings{CTT100574660,
  author = {Nozomi Suzuki and Keisuke Koba and Yohei Matsui and Keita Yamada and Naohiro Yoshida},
  title = {Influence of Long-term, Whole-Ecosystem Experiments on Methane Dynamics in Arctic Soils},
  booktitle = {4th International Symposium on Isotopomers proceedings},
  year = 2008,
}

@inproceedings{CTT100574718,
  author = {Keisuke Koba and Yurika Isogai and Muneoki Yoh and Jiangming Mo and Sakae Toyoda and Naohiro Yoshida},
  title = {Nitrogen dynamics in a sub-tropical forest in south China},
  booktitle = {4th International Symposium on Isotopomers proceedings},
  year = 2008,
}

@inproceedings{CTT100574675,
  author = {Sakae Toyoda and Midori Yano and Sei-ichi Nishimura and Keisuke Koba and Keita Yamada and Naohiro Yoshida},
  title = {Isotopomeric analysis of N2O emitted from temperate agricultural soils},
  booktitle = {4th International Symposium on Isotopomers proceedings},
  year = 2008,
}

@inproceedings{CTT100574673,
  author = {Akiko Makabe and K. Koba and I. Tayasu and M. Itoh and N. O. Ogawa and S. Toyoda and N. Yoshida},
  title = {Dynamics of nitrous oxide emitted from a sewage-polluted river in Mongolia},
  booktitle = {4th International Symposium on Isotopomers proceedings},
  year = 2008,
}

@inproceedings{CTT100574644,
  author = {Yuji Sasaki and Keisuke Koba and Muneoki Yoh and Akiko Makabe and Yuichiro Ueno and Mayuko Nakagawa and Sakae Toyoda and Naohiro Yoshida},
  title = {Nitrogen cycling in Lake Kizaki clucidated by isotopic analysis},
  booktitle = {4th International Symposium on Isotopomers proceedings},
  year = 2008,
}

@inproceedings{CTT100574781,
  author = {豊田栄 and 岩井宏之 and 木庭啓介 and 吉田尚弘},
  title = {アイソトポマー比を用いた都市河川における N2Oの動態解析},
  booktitle = {日本地球化学会第55回年会講演要旨集},
  year = 2008,
}

@misc{CTT100595671,
  author = {keisuke koba},
  title = {Nitrogen dynamics in forested ecosystems elucidated by 15N natural abundance method},
  year = 2000,
}



@phdthesis{CTT100595671,
  author = {keisuke koba},
  title = {Nitrogen dynamics in forested ecosystems elucidated by 15N natural abundance method},
  school = {京都大学},
  year = 2000,
}