Fig. 2From: To control floating drug delivery system in a simulated gastric environment by adjusting the Shell layer formulationThe cross-sectional SEM images of floating beads with various formulation in chitosan and xanthan gum shell layer. The C/X ratios are 4:1 (A), 4:2 (B), 4:3 (C), 4:4 (D) and 1:4 (E). The magnified images of alginate dense bead (F) and floating beads with C/X = 4:3 (G) were presented to identify the dense and porous structures in beadsBack to article page