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Morphology images using scanning electron microscope (SEM): (A) spray-dried samples and the diameter of final product measured by Image-J software; (B) spray-dried blanks (PVA_SDS, PVA_SDS_LEU, PVA_SDS_MAN, and PVA_SDS_LEU_MAN). PS: particle size. Data are mean ± SD (n = 3 independent measurements).
