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. 2021 Aug 28;13(9):1356. doi: 10.3390/pharmaceutics13091356

Figure 9.

Figure 9

Second derivate IR mappings of Fe3O4@β-CD/PTX drop-cast: surface intensity distribution of (a) 2930 cm−1, (b) 1029 cm−1 and (c) ester/ketonic carbonyl vibration at 1739 cm−1.