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Differential scanning calorimetry (DSC) thermograms of: empty pan—black; pure doxycycline hyclate—light blue; pure β-cyclodextrin—light green; HPMC—pink; doxycycline-β-cyclodextrin (freeze-dried) + HPMC microparticles—green; and doxycycline-β-cyclodextrin in HPMC solution and HPMC microparticles—blue.
