Fig. 1From: Repair of osteochondral defect using icariin-conditioned serum combined with chitosan in rabbit kneesCSSH showed no cytotoxic effects on L929 cells. a NMR spectrogram for chitosan and chitosan-SH (CSSH). b Cell viability of L929 fibroblasts treated by CSSH at the concentrations of 0.75, 1.5, 3 mg/ml for 24, 48, 72 h (n = 8, mean ± SD)Back to article page