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. 2020 Dec 9;8:610232. doi: 10.3389/fchem.2020.610232

Figure 3.

Figure 3

Scanning electron microscope images of β-tricalcium phosphate (β-TCP) (a1,a2), 2Cu-MSN-TCP (b1,b2), 4Cu-MSN-TCP (c1,c2), 6Cu-MSN-TCP (d1,d2), and 8Cu-MSN-TCP (e1,e2) scaffolds. The concentration of released Ca (f), Si (g), and Cu (h) ions from β-TCP and 8Cu-MSN-TCP scaffolds in phosphate-buffered saline (PBS) on days 1, 4, and 7.