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SEM micrographs of the probiotic hydrogel-based edible films cross section with (upper) and without (lower) WPC. (a): Pectin, (b): LV sodium alginate, (c): HV sodium alginate, (d): kappa-carrageenan/LBG-(8:2). Scale bar = 10 μm, the cells of L. rhamnosus GG embedded in the biopolymer matrices are tentatively marked with white circles.
