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. 2013 Aug 26;8(8):e71265. doi: 10.1371/journal.pone.0071265

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© 2013 Chen et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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The 1/1 ratio NFS group exhibited carbonyl stretching (C = O) at 1754 cm⁻¹ (due to PLLA) and 1731 cm⁻¹ (due to PCL), while other NFS group gave a single peak at 1754 cm⁻¹.