Table 4 Thermal stability and proportions of the various collagen populations in historical leathers obtained by deconvolution of the full DSC peak
Sample | ∆H/J g−1 | ∆T1/2/°C | Tmax/°C | Population G | Population P | Population L | |||
|---|---|---|---|---|---|---|---|---|---|
T/°C | % | T/°C | % | T/°C | % | ||||
BU-1 | 37.8 (4.6) | 39.8 (3.5) | 47.5 (3.6) | 39.5 (3.6) | 12 | 47.5 (3.6) | 40 | 66.0 (3.6) 84.4 (3.2) | 35 13 |
BU-2 | 31.3 (4.4) | 28.9 (3.5) | 47.0 (1.2) | – | – | 47.0 (1.2) | 59 | 65.4 (1.0) 82.8 (1.8) | 31 10 |
BU-3 | 36.6 (3.6) | 35.7 (2.8) | 69.5 (1.2) | 42.9 (2.0) | 14 | 54.2 (1.8) | 16 | 69.5 (1.2) 80.6 (1.5) | 42 28 |
BU-4 | 7.3 (3.2) | 10.7 (1.3) | 38.5 (1.5) | 38.5 (1.5) | 78 | 55.0 (0.8) | 22 | – | – |
BU-5 | 7.1 (2.0) | 11.0 (1.5) | 50.0 (4.9) | – | – | 45.2 (5.9) 50.0 (4.9) 55.4 (3.1) | 12 75 13 | – | – |
BU-6 | 28.9 (2.9) | 14.7 (1.8) | 48.2 (1.9) | 33.6 (2.9) | 5 | 48.2 (1.9) 60.3 (2.8) | 74 6 | 76.6 (1.6) 84.9 (1.2) | 6 9 |
BU-7 | 9.8 (0.7) | 10.6 (1.1) | 33.7 (0.9) | 33.7 (0.9) 42.6 (1.2) | 66 17 | – | – | 85.1 (1.6) | 17 |
BU-8 | 16.6 (0.5) | 6.5 (1.2) | 66.2 (2.1) | – | – | – | – | 66.2 (2.1) 75.7 (1.8) | 81 19 |
BU-9 | 18.5 (1.4) | 4.8 (0.3) | 55.1 (0.7) | 20÷30 | 7 | 55.1 (0.7) 64.9 (1.8) | 82 11 | – | – |
BU-10 | 44.6 (2.7) | 10.4 (1.9) | 51.1 (1.1) | 44.2 (1.4) | 10 | 51.1 (1.1) | 42 | 69.0 (0.9) 84.4 (1.4) | 39 9 |