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Photo and SEM images of different hydrogel formulations, with and without EO, nanoliposomes, and nanoliposome/maltodextrin complexes. (A): control hydrogel; (B): hydrogel with EO; (C): hydrogel with lecithin and EO (14.23%); (D): hydrogel with lecithin, maltodextrin and EO (20%); (E): hydrogel with lecithin, maltodextrin and EO (25%); (F): hydrogel with lecithin, maltodextrin, and EO (33%) [79].
