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. Author manuscript; available in PMC: 2013 Nov 1.
Published in final edited form as: Biomaterials. 2012 Jul 28;33(32):7933–7944. doi: 10.1016/j.biomaterials.2012.07.027

Fig. 3.

Fig. 3

Comparison of color changes of bromothymol blue (BB) and bromocresol purple (BP) in different solutions or cocktails including pure PLGA, DBHD/N2O2, 20 wt% DBHD/N2O2 mixed in PLGA, 20 wt% DBHD in PLGA and silicone rubber THF solution (The concentration for all polymer solution is 200mg/3mL). a-50:50 lactide: glycolide PLGA is used for all the experiment. The indicator concentration is 10 mmol kg−1. The colors of the solutions were compared rightly after the solutions were prepared. The color chart below indicates the variation of indicator colors with pH in PBS buffer.