Table 4 Experimental layout and results of the Plackett–Burman experimental design
From: New keratinolytic bacteria in valorization of chicken feather waste
Run | X1 | X2 | X3 | X4 | X5 | X6 | X7 | Protein (μg/mL) | Amino acids (mm) |
|---|---|---|---|---|---|---|---|---|---|
1 | − 1 | − 1 | − 1 | + 1 | + 1 | + 1 | − 1 | 77.0 ± 4.2 | 33.37 ± 0.09 |
2 | − 1 | − 1 | + 1 | + 1 | − 1 | − 1 | + 1 | 116.5 ± 6.4 | 34.70 ± 0.28 |
3 | − 1 | + 1 | − 1 | − 1 | + 1 | − 1 | + 1 | 29.0 ± 11.3 | 20.45 ± 1.41 |
4 | − 1 | + 1 | + 1 | − 1 | − 1 | + 1 | − 1 | 42.5 ± 0.7 | 17.78 ± 1.04 |
5 | + 1 | − 1 | − 1 | − 1 | − 1 | + 1 | + 1 | 302.0 ± 18.4 | 62.08 ± 0.75 |
6 | + 1 | − 1 | + 1 | − 1 | + 1 | − 1 | − 1 | 453.5 ± 3.5 | 63.94 ± 3.20 |
7 | + 1 | + 1 | − 1 | + 1 | − 1 | − 1 | − 1 | 190.0 ± 4.2 | 60.88 ± 1.88 |
8 | + 1 | + 1 | + 1 | + 1 | + 1 | + 1 | + 1 | 242.5 ± 2.1 | 79.46 ± 1.04 |