Table 2.
Fractional factorial design matrix with independent variables in actual and coded values, and observed values of response variable (% deproteinization) in the deproteinization of demineralized shrimp byproducts. X1, Concentration of NaOH solution (%, w/v); X2, reaction time (h); X3, reaction temperature (°C); X4, solid liquid ratio of NaOH solution (w/v); X5, number of treatments
| Run | Independent variables | Response variable | ||||
|---|---|---|---|---|---|---|
| X1 | X2 | X3 | X4 | X5 | Deproteinization (%, w/w) | |
| 1 | 0.10 (−1) | 0.5 (−1) | 30 (−1) | 1 (−1) | 3 (+1) | 6.86 |
| 2 | 4.90 (+1) | 0.5 (−1) | 30 (−1) | 1 (−1) | 1 (−1) | 55.52 |
| 3 | 0.10 (−1) | 4.5 (+1) | 30 (−1) | 1 (−1) | 1 (−1) | 10.45 |
| 4 | 4.90 (+1) | 4.5 (+1) | 30 (−1) | 1 (−1) | 3 (+1) | 33.54 |
| 5 | 0.10 (−1) | 0.5 (−1) | 100 (+1) | 1 (−1) | 1 (−1) | 23.37 |
| 6 | 4.90 (+1) | 0.5 (−1) | 100 (+1) | 1 (−1) | 3 (+1) | 91.00 |
| 7 | 0.10 (−1) | 4.5 (+1) | 100 (+1) | 1 (−1) | 3 (+1) | 17.47 |
| 8 | 4.90 (+1) | 4.5 (+1) | 100 (+1) | 1 (−1) | 1 (−1) | 93.00 |
| 9 | 0.10 (−1) | 0.5 (−1) | 30 (−1) | 9 (+1) | 1 (−1) | 33.14 |
| 10 | 4.90 (+1) | 0.5 (−1) | 30 (−1) | 9 (+1) | 3 (+1) | 50.92 |
| 11 | 0.10 (−1) | 4.5 (+1) | 30 (−1) | 9 (+1) | 3 (+1) | 33.53 |
| 12 | 4.90 (+1) | 4.5 (+1) | 30 (−1) | 9 (+1) | 1 (−1) | 59.98 |
| 13 | 0.10 (−1) | 0.5 (−1) | 100 (+1) | 9 (+1) | 3 (+1) | 57.23 |
| 14 | 4.90 (+1) | 0.5 (−1) | 100 (+1) | 9 (+1) | 1 (−1) | 89.58 |
| 15 | 0.10 (−1) | 4.5 (+1) | 100 (+1) | 9 (+1) | 1 (−1) | 73.57 |
| 16 | 4.90 (+1) | 4.5 (+1) | 100 (+1) | 9 (+1) | 3 (+1) | 100.00 |
| 17 | 2.5 (0) | 2.5 (0) | 65 (0) | 5 (0) | 2 (0) | 71.05 |
| 18 | 2.5 (0) | 2.5 (0) | 65 (0) | 5 (0) | 2 (0) | 73.14 |
| 19 | 2.5 (0) | 2.5 (0) | 65 (0) | 5 (0) | 2 (0) | 74.02 |
| 20 | 2.5 (0) | 2.5 (0) | 65 (0) | 5 (0) | 2 (0) | 63.47 |