Table 1. Face-centered central composite design with independent (temperature and time) and response variables (extraction yield and gel strength) for gelatin extraction from Korean native black goat skin
Experiment number | Factors | Response variables |
X1 | X2 | Extraction yield (%, w/w) | Gel strength (g) |
1 | 60 | 3 | 12.1 | 260.4 |
2 | 60 | 3 | 12.6 | 262.9 |
3 | 60 | 3 | 12.5 | 263.9 |
4 | 70 | 4 | 13.3 | 251.8 |
5 | 70 | 3 | 13.2 | 255.6 |
6 | 50 | 3 | 10.7 | 271.6 |
7 | 60 | 2 | 12.0 | 264.3 |
8 | 60 | 3 | 12.6 | 262.2 |
9 | 60 | 4 | 13.4 | 252.5 |
10 | 60 | 3 | 13.0 | 266.4 |
11 | 70 | 2 | 12.7 | 256.1 |
12 | 50 | 2 | 10.2 | 263.2 |
13 | 50 | 4 | 11.2 | 265.2 |
X1, extraction temperature (°C); X2, extraction time (h).