Results: (1) The features of BDP-PLGA nano-capsules were described as smooth surface and average diameter 126.4nm with normal distribution, the rate of earring BDP is 36.4%? . 07% .

• 结果：(1)BDP纳米微囊呈球形，粒径分布呈均值为126.；4nm的正态分布，载药率为36