"Wu Chen,山田桂太,角川 修,松永明子,Tarin Nimmanwudipong,Alexis Gilbert,吉田尚弘","茶葉中カフェインの安定同位体炭素と窒素の解析手法の開発","2013年日本地球化学会第60回年会","2013年日本地球化学会第60回年会講演要旨集",,,,"p. 146",2013,Sept. "Chen Wu,Keita Yamada,Osamu Sumikawa,Akiko Matsunaga,Alexis Gilbert,Naohiro Yoshida","Factors controlling the carbon isotopic variation of caffeine","ISI2012",,,,,,2012,June "Chen Wu,Keita Yamada,Osamu Sumikawa,Akiko Matsunaga,Alexis Gilbert,Naohiro Yoshida","Development of a methodology using gas chromatography-combustion-isotope ratio mass spectrometry for the determination of the carbon isotope ratio of caffeine extracted from tea leaves (Camellia sinensis)",,"Rapid Communications in Mass Spectrometry",,"Vol. 26",,"pp. 978-982",2012, "Naohiro Yoshida,Sakae Toyoda,Azzaya Tumendelger,Yuuri Suzuki,Keita Yamada,Shohei Hattori,Chen Wu,Hiroshi Shiom,Rina Kouno","Nitrous oxide and methane isotopomer analysis in wastewater treatment system in order to reduce their emissions without reduction of water quality","The 4th IWA-ASPIRE Conference & Exhibition",,,,,,2011,Oct. "Wu Chen,Keita Yamada,Osamu Sumikawa,Yuichi Yamaguchi,Naohiro Yoshida","Authenticity of origins of tea leaves by stable isotopic signature: Preliminary results","ISI2010",,,,,,2010,June "Wu Chen,Keita Yamada,Sakae Toyoda,Naohiro Yoshida,Rina Kono,Koki Murayama","Investigation of methane emission during sewage water treatment in Japan through carbon isotope ratio","日本地球化学会2009年会","日本地球化学会2009年会講演要旨集","日本地球化学会","Vol. 57",,"p. 260",2009,Sept.