Ultrasound       Particle size           Entrapment efficiency        Drug loading
power (%)          (nm)                             (%)                                 (%)
 

20                       136.4                            58.2                             5.50
40                       101.8                            53.3                             5.06
60                       159.1                            47.8                             4.56
80                       133.3                            45.5                             4.35