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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Biopolymers. 2011 Jun 22;95(12):840–851. doi: 10.1002/bip.21687

Figure 1.

Figure 1

Procedures for making the three types of networks, A, B and C. Each network underwent lyophilization twice. x% chitosan was mixed with x% alginate in a 1:1 volume ratio. Type A & B samples were made by adding Ca2+ to the chitosan-alginate mixture at a volume ratio of 10:1 chitosan-alginate:CaCl2. Type A & B samples were lyophilized and then soaked in ultrapure H2O and a mass fraction of 2% chondroitin respectively. Type C samples were made by adding chondroitin to the chitosan-alginate mixture at a volume ratio of 6:1 chitosan-alginate:chondroitin. Type C samples were lyophilized and soaked in a mass fraction of 1% CaCl2.