Table 1.

Disperse characteristics of doxorubicin-free and doxorubicin-containing microbeads and microcapsules with different structures.

Sample *	Size, µm **	ζ-Potential, mV
DOX-free MBs	2.5 ± 07	−17.2 ± 0.8
DOX-free MCs	2.0 ± 0.4	−20.4 ± 2.2
DOX-containing MBs	2.0 ± 0.4	−12.5 ± 1.7
DOX-containing MCs(8L)	2.4 ± 0.6	−7.5 ± 2.2
DOX-containing MBs(+8L)	2.0 ± 0.8	−23.5 ± 2.4

* MBs, calcium carbonate microbeads; MCs, microcapsules; 8L, the number of assembled polyelectrolyte layers (PAH/PSS)₄; DOX, doxorubicin; ** the size was estimated using optical microscopy. The microbeads and microcapsules with different structures did not differ significantly from one another in size (p > 0.05, Student’s t-test).