Table 1 Matrix of Plackett & Burman experimental design
From: Immobilization of commercial inulinase on alginate–chitosan beads
| Independent variables | Coded levels of variables | ||
|---|---|---|---|
| -1 | 0 | +1 | |
| Chitosan (%) | 0.1 | 0.25 | 0.4 |
| Glutaraldehyde (%) | 0.1 | 0.50 | 0.9 |
| Sodium alginate (%) | 1 | 3 | 5 |
| CaCl2 (%) | 1 | 2 | 3 |
