Erratum to: One-stage immobilization of the microalga Porphyridium purpureum using a biocompatible silica precursor and study of the fluorescence of its pigments. - Voznesenskiy SS; Popik AY; Gamayunov EL; Orlova TY; Markina ZV; Postnova IV; Shchipunov YA (European biophysics journal : EBJ, 2018)