Fig. 1From: Nano hydrogel-based oxygen-releasing stem cell transplantation system for treating diabetic footPreparation of oxygen release system. A Schematic representation of core-shell structured microspheres produced by the co-axial electrospraying technique. B Schematic illustration of the PLGA shell of oxygen-releasing microspheres with surface-immobilized peroxidase constructed with PLA-PEG-Biotin.Back to article page