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. 2022 May 31;26:21. doi: 10.1186/s40824-022-00265-7

Fig. 4.

Fig. 4

Apatite layers formation on the surface of 3D scaffolds (Col, Col-P, and Col-HA) and 2D membrane (Col-HA-M) after immersion in the simulated body fluid for 7, 14, and 21 days (Scale bar of 1 mm and 100 µm for the scaffold and membrane, respectively)