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. 2016 Dec 29;13(2):429–436. doi: 10.3892/etm.2016.4013

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Copyright: © Si et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 2. — Characteristics of the bFGF-PLGA microspheres. (A) The lyophilized powder of controlled-release bFGF-PLGA microspheres appeared as uniform white loose lumps. (B) The bFGF-PLGA microspheres appeared as round and smooth spheres under transmission electron microscopy (magnification, ×5,000). (C) The bFGF was gradually released from the microspheres for 14 days, and the concentration was maintained within a range of 67.25 to 89.81 ng/ml. (D) The slow-release of bFGF-PLGA microspheres displayed a gradual release curve, with a release rate of 72.47% following 14 days. bFGF, basic fibroblast growth factor; PLGA, poly-lactic-co-glycolic acid.