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. 2014 Dec 10;14(12):23781–23802. doi: 10.3390/s141223781

Figure 5.

Figure 5.

(a) Alginate hydrogel sample; (b) sample incorporated into the well of the PDMS cover layer. The pink colour is given by the culture medium, which contains Phenol Red, a pH indicator used to monitor the tissue during the encapsulation of the fibroblasts. It was included in the acellular tissues as well to ensure the composition was as comparable to the cellular tissues as possible.