Fig. 3From: PLA-lignin nanofibers as antioxidant biomaterials for cartilage regeneration and osteoarthritis treatmentA The proliferation of BMSCs on PLLA/LP the nanofibers. B Confocal imaging of live (green) and dead (red) cells. (C) Quantification of cell viability. Values are presented as the means ± SD, n = 3, different letters denote significances with P < 0.05Back to article page