Fig. 5

Encapsulation efficiency (a) and releasing profile (b) of tetracycline-alginate floating beads in pH = 2 buffer. In (a), the significant differences were indicated by ### (p < 0.005) from t-test (n ≥ 3). In (b), the significant differences were indicated by * (p < 0.1) and ** (p < 0.05) from ANOVA test with the same release time (n ≥ 4)