Photochemical migration of liquid column in a glass tube M. Muto, Y. Ayako, K. Yamamoto, M. Yamamoto, Y. Kondo and M. Motosuke Eur. Phys. J. Special Topics, 226 6 (2017) 1199-1205 Published online: 02 May 2017 DOI: 10.1140/epjst/e2016-60217-y