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Alg-Mg/SF hydrogel promoted peripheral myelination in PNI rats. (a) TEM images of transverse sections of regenerated nerve fibers 8 weeks post-surgery; scale bars, 2 μm in the upper row and 100 nm in the lower row, respectively. (b–d) Histograms showing the average thickness of regenerating myelin sheath (b), the diameter of myelinated axons (c), and the numbers of myelin lamellae (d) in Alg, Alg-Mg, Alg/SF, Alg-Mg/SF groups (n = 3); *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001.
