Bands appearing between 1300 and 1380 cm1 are
assigned to CeO angular deformations of phenols. Therefore,
considering the TTI spectrum in comparison to PVA/chitosan
without anthocyanins (Fig. 1 and Table 2), changes are present in
the region between 1500 and 1600 cm1, with a clear increase in
the intensity of the bands in this region.