Table 1. Characteristics of four endostatin-loaded nanoparticles.

No.	Amount of ES (μL)	Size (nm)	PDI	Zeta potential (mV)	EE (%)	LE (%)
1	0	211.50 ± 1.58	0.223 ± 0.005	−38.36 ± 0.11	–	–
2	250	227.31 ± 2.64	0.238 ± 0.017	−38.17 ± 0.41	78.25 ± 2.10	6.08 ± 0.16
3	500	246.89 ± 3.50	0.285 ± 0.008	−36.34 ± 0.16	74.81 ± 4.23	10.74 ± 0.16
4	1000	247.91 ± 2.38	0.289 ± 0.001	−32.21 ± 0.32	62.42 ± 2.90	11.46 ± 0.54