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Ferning patterns observed after evaporation of microdroplets of mucomimetic polymers (MMP) solutions. (A) CHA 0.001%, (B) CHA 0.01%, (C): HA 0.01%, (D) HA 0.1%, (E) CMC 0.01%, (F) CMC 0.1%, (G): GG 0.05%. The field of view is 0.8 mm × 0.8 mm.
