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. Author manuscript; available in PMC: 2019 Jun 1.
Published in final edited form as: Acta Biomater. 2018 Apr 10;73:355–364. doi: 10.1016/j.actbio.2018.03.058

Figure 1.

Figure 1

FTIR-ATR of silk films a) Normalised spectra from 5 replicate (grey shades) non-annealed silk films and mean spectrum (red), and fitted conformers – (amide II fitting peaks have been omitted for clarity) refer to materials and methods section for individual peak ID. b) Reduced chi square from curve fitting and c) Pooled standard deviation of the fitted replicate non-annealed silk films for different distributions or combinations of the variables selected. Terms ‘free’ and ‘fixed’ refer to the level of freedom for the particular conformer maximum to move, ‘free’ is within literature ranges and ‘fixed’ is limited to the centre point of these ranges.