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. 2017 Dec 16;9(12):719. doi: 10.3390/polym9120719

Figure 6.

Figure 6

Resonance frequency difference, Δf, upon exposure of a (DAR/WP6)30/DAR multilayer film to MV solution (pH 7.8, green) and acetic buffer (pH 3.6) as the releasing agent (yellow). The blue bars represent the exposure of the film to phosphate buffer (pH 7.8).