2026-06-03 東京大学,名古屋大学,理化学研究所,高輝度光科学研究センター
軟X線分光顕微鏡で計測した植物プランクトン像とそこに含まれる酸素の量
＜関連情報＞
- https://www.issp.u-tokyo.ac.jp/maincontents/news2.html?pid=30927
- https://opg.optica.org/oe/abstract.cfm?doi=10.1364/OE.589585
軟X線分光プティコグラフィーによる単一海洋植物プランクトンの定量的元素質量評価 Quantitative Elemental Masses of a Single Marine Phytoplankton Evaluated with Soft X-ray Spectro-ptychography
Jordan O’Neal, Satoshi Matsuyama, Kai Sakurai, Kyota Yoshinaga, Yu Nakata, Chiho Funaki, Yoko Takeo, Takenori Shimamura, Makina Yabashi, Haruhiko Ohashi, Kazutaka Takahashi, Mari Shimura, Taketoshi Kodama, and Takashi Kimura
Optica Express Published: June 4, 2026
DOI:https://doi.org/10.1364/OE.589585
Abstract
We demonstrate quantitative, high-resolution imaging of oxygen and iron in a single centric diatom, Thalassiosira weissflogii, using soft X-ray spectro-ptychography (SP), capable of elemental mapping. The quantitative accuracy of SP is tested by measuring the oxygen mass of SiO2 microspheres. SP is then directly compared to scanning X-ray fluorescence microscopy by measuring the iron mass within the same T. weissflogii cell, demonstrating consistent distributions with similar spatial resolution. The oxygen mass measurement of the T. weissflogii cell shows significantly higher resolution compared with iron due to the large edge jump ratio, showing the potential for quantitative measurements of the mass of light elements, carbon, nitrogen, and oxygen, in a single cell.
