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. Author manuscript; available in PMC: 2014 May 1.
Published in final edited form as: Adv Healthc Mater. 2012 Nov 26;2(5):673–677. doi: 10.1002/adhm.201200346

Figure 1.

Figure 1

a) Schematic illustration of microbead fabrication process. b, c) Light microscopy images of 65–35 wt% collagen-chitosan microbeads (panel c show microbeads containing 2.5 mg/mL hydroxyapatite). d) Light microscopy of a population of collagen/chitosan microspheres showing their generally spheroidal morphology. e, f) Fluorescence microscopy of human mesenchymal stem cells embedded in 65–35 wt% collagen-chitosan microbeads at day 1 and day 7 of culture, respectively. The cytoplasm of living cells is stained green, and the nuclei of dead cells are stained red.