References

1. M. Knight, “Countercurrent chromatography research shaped by Yoichiro Ito,” J. Chromatogr. A 1759, 466084 (2025). DOI: 10.1016/j.chroma.2025.466084.
2. Y. Ito, “Countercurrent chromatography,” in Countercurrent Chromatography: Theory and Practice, N. B. Mandava and Y. Ito (Eds.), Marcel Dekker, New York (1988), Ch. 3, p. 300.
3. Y. Ito, “Origin and evolution of the coil planet centrifuge: A personal reflection of my 40 years of CCC research and development,” Sep. Purif. Rev. 34(2), 131–154 (2005). DOI: 10.1080/15422110500322883.
4. Y. Ito, “High-speed countercurrent chromatography,” Crit. Rev. Anal. Chem. 17, 65–143 (1986).
5. Y. Ito, R. Clary, J. Powell, M. Knight, T. M. Finn, “Spiral tube support for high-speed countercurrent chromatography,” J. Liq. Chromatogr. Relat. Technol. 31(9), 1346–1357 (2008).
6. K. Burns, S. Burns, D. McMahon, Leonardo da Vinci, PBS documentary series, premiered Nov 18–19 (2024).
7. W. Isaacson, Leonardo da Vinci, Simon & Schuster, New York (2018).
8. L. Reti (Ed.), The Unknown Leonardo, 1st ed., McGraw-Hill, New York (1974).
9. E. Kitazume, M. Bhatnagar, Y. Ito, “Separation of rare earth elements by high-speed countercurrent chromatography,” J. Chromatogr. 538, 133–140 (1991).