Fig. 4From: PLA-lignin nanofibers as antioxidant biomaterials for cartilage regeneration and osteoarthritis treatmentA The morphology of BMSCs on PLLA/LP nanofibers were observed by SEM. B Cytoskeletal morphology of BMSCs were investigated using rhodamine-phalloidin staining for actin cytoskeleton. Values are presented as the means ± SD, n = 3, different letters denote significances with P < 0.05Back to article page