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. 2014 Jul 14;6(3):416–435. doi: 10.3390/pharmaceutics6030416

Figure 6.

Figure 6

FTIR spectra of crystalline TRP, amorphous TRP ball milled for 6 h, co-amorphous TRP–PRO, the ball-milled mixture, NAP–TRP, and co-amorphous NAP–TRP–PRO.