Table 2.
Relative content of secondary structures of the annealed films made with SF dissolutions obtained from cocoons stifled with different methodologies.
| β-sheet (%) | Random coil (%) | α-helices (%) | Turns(%) | Side chains (%) | |
|---|---|---|---|---|---|
| Negative control | 30.9 ± 0.6 | 24.4 ± 0.4 | 9.3 ± 0.4 | 17.6 ± 0.4 | 17.9 ± 1.0 |
| Sun exposure (5 d) | 32.3 ± 0.7 | 23.7 ± 0.4 | 9.5 ± 0.4 | 18.2 ± 0.7 | 16.3 ± 0.6 |
| Water vapour (3 h) | 31.6 ± 1.8 | 25.1 ± 2.1 | 9.3 ± 0.9 | 17.3 ± 0.2 | 16.7 ± 0.5 |
| Dry heat 55 °C (7 h) | 30.4 ± 0.4 | 26.6 ± 0.3 | 8.6 ± 0.1 | 17.3 ± 0.2 | 17.1 ± 0.4 |
| Dry heat 70 °C (7 h) | 40.3 ± 0.1* | 20.1 ± 0.2* | 10.5 ± 0.1 | 16.7 ± 0.1 | 12.5 ± 0.1* |
| Dry heat 85 °C (7 h) | 40.4 ± 0.3* | 20.6 ± 0.8* | 10.0 ± 0.8 | 16.7 ± 0.4 | 12.3 ± 0.3* |
Data are obtained from Fourier self-deconvolution of the infrared spectra covering the amide I region. Values are expressed as mean ± standard deviation (n = 3).
*Statistically different values compared to negative control (Bonferroni, p < 0.01).