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Circular dichroism analysis to assess the stability of encapsulated bovine serum albumin (BSA). Stability of BSA released from microneedles after storage for 3 days at 37°C is compared with a freshly prepared BSA solution and BSA degraded by heating at 75°C and under acidic conditions, pH 2 (A) mean residue ellipticity and (B) percentage of alpha-helix. All results confirmed the alpha helix structure of BSA was preserved during encapsulation and release over a period of 3 days.
