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. 2023 Jun 12;15(6):1710. doi: 10.3390/pharmaceutics15061710

Figure 13.

Figure 13

Comparison between Raman spectra of the XIBP = 0.8 blend taken at −100 °C just after cryomilling and after a first heating ramp up to 100 °C (a) in the low-frequency region, (b) in the C=O stretching region; the arrow localizes the Raman band distinctive of the H-bond network of IBP. These spectra are compared with those of glassy IBP at the same temperature.