Samples were ground with KBr and compressed to make pellets. The following samples were assayed: (A) lamivudine, (B) empty eudragit-coated pectin microspheres, (C) physical mixture of pectin, eudragit S-100, and lamivudine, and (D) lamivudine loaded microspheres. 2.2.5 Differential scanning calorimetry (DSC) Differential scanning calorimetry (DSC) measurements were performed with a DSC 6200 thermal analysis system (Seiko Instruments Inc., Tokyo, Japan). Samples (4 mg) were heated…
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