Fig. 2From: Decellularized nucleus pulposus matrix/chitosan hybrid hydrogel combined with nucleus pulposus stem cells and GDF5-loaded microspheres for intervertebral disc degeneration preventionThe composite hydrogels had good mechanical properties. (A) SEM image of DNPM/chitosan composite hydrogel. (B) Fourier transform infrared spectroscopy was used to analyze the main components of the composite hydrogel. (C) The composite hydrogel was tested for compression performance check. (D) The composite hydrogel was tested for rheological property. (n ≥ 3)Back to article page