Table 1 Band assignments for the protein secondary structure of EPS from SAC-incubated sludge from derivative spectra and curve fitting
Group | Aggregated strands (1610–1625) | β-sheet (1630–1640) | α-helix (1648–1657) | 3-Turn (1659–1666) | β-anti (1680–1695) | Tightness degree |
|---|---|---|---|---|---|---|
0% | 10.3% | 34.0% | 19.1% | 28.5% | 8.18% | 0.57 |
0.1% | 10.4% | 39.5% | 18.7% | 25.8% | 5.62% | 0.47 |
0.5% | 6.08% | 38.1% | 21.0% | 28.7% | 6.13% | 0.55 |
1% | 12.9% | 42.1% | 17.6% | 22.7% | 4.67% | 0.42 |
2% | 10.7% | 38.7% | 19.3% | 25.6% | 5.70% | 0.50 |
5% | 9.84% | 38.3% | 18.7% | 26.8% | 6.36% | 0.48 |
10% | 10.3% | 37.1% | 20.7% | 25.0% | 7.31% | 0.56 |