Figure 4

(A–D) TEM image of propolis extracts before and after nano-capsulation. (A) TEM of propolis ethanol extract; (B) TEM of propolis SCF-CO₂ extract at 50 °C. (C) TEM of propolis ethanol extract nano-capsules; (D) TEM of propolis SCF-CO₂ extract nano-capsules at 50 °C.