Biogeosciences

Nanomolar-scale Sulfate Sulfur Isotope Analysis Using a Combined Ion Chromatography-Barite Precipitation and nano-EA/IRMS

Nanako O OGAWA, Toshihiro Yoshimura, Takeru Kochi, Junichiro Kuroda, Yoshinori Takano, Naohiko Ohkouchi

Fatty Acids as the Main Energy Source in Polyps of the Jellyfish (Cnidaria: Aurelia aurita) for Survival Strategy under Overpopulation: Insights from Compound-Specific Isotope Analysis

Nayeon Park, Hyuntae Choi, Yuko Takizawa,Yoshito Chikaraishi

Nitrogen isotopic composition of amino acids reveals a variety of trophic ecology of organisms inhabiting chemosynthesis-based ecosystems

Masashi Tsuchiya, Takao Yoshida, Yoshito Chikaraishi, Nanako O Ogawa, Hidetaka Nomaki, Yoshihiro Fujiwara, Yasuhiko T Yamaguchi, Yohei Tada, Robert G Jenkins, Yoko Sasaki, Katsunori Fujikura, Naohiko Ohkouchi

Elucidating the isotopic dynamics of nitrate and ammonium in the Fuji River using a Lagrangian approach: stable nitrate and fractionating ammonium

Công Thuận Nguyễn, Tomoya Iwata, Yuta Ikeda, Midori Yano, Akiko Makabe, Keisuke Koba

Methane- and hydrogen-dependent prokaryotic deep biosphere at the Suwa Basin, Japan: impacts of hydrogeological processes on subsurface prokaryotic ecology at the boundary between the North American and the Eurasian Plates

Hiroki Nishimura, Atsushi Urai, Yohei Matsui, Toshihiro Yoshimura, Miyuki Ogawara, Hiroyuki Imachi, Yosuke Miyairi, Yusuke Yokoyama, Yuichi Miyabara, Yoshio Takahashi, Yoshinori Takano

Fractionation of nitrogen isotopes in the enzymatic deamination of alanine: an insight into the quantitative evaluation of anaerobic metabolism in ecosystems

Yuko Takizawa, Hyuntae Choi, Mio Shibuya, Nayeon Park, Prarthana S. Dharampal, Shawn A. Steffan, Yoshito Chikaraishi

A compound-specific method for measuring the stable carbon isotopic composition of amino acids: elimination of the effect of isotopic fractionation during derivatization

Yoshito Chikaraishi, Hyuntae Choi, Nayeon Park,Yuko Takizawa

Reconstructing the body temperature of extinct marine reptiles

Takashi Sambuichi, Urumu Tsunogai, Fumiko Nakagawa

Chromatographic isolation for performing enantiomer-specific radiocarbon analysis (ESRA): first method development for individual L- and D-amino acids

Thomas M. Blattmann, Yuchen Sun, Nanako O. Ogawa, Yoshinori Takano, Negar Haghipour, Naoto F. Ishikawa, Timothy I. Eglinton, Naohiko Ohkouchi

New evaluation of vertical particulate organic carbon fluxes of submillimeter‑sized phaeodarians in the mesopelagic twilight zone of the western North Pacific Ocean

Takahito Ikenoue, Nanako O. Ogawa, Hidetaka Nomaki, Katsunori Kimoto, Makio C. Honda, Naohiko Ohkouchi, Tetsuichi Fujiki