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D-optimal design variables and evaluated responses for foam formulation.
| Levels |
||
|---|---|---|
| Low | High | |
| X1: HPMC concentration (%) | 0.5 | 1 |
| X2: SDS concentration (%) | 0 | 4 |
| X3: Tween 20 concentration (%) | 0 | 4 |
| X4: Pluronic concentration (%) | 0 | 4 |
| Evaluated responses | Desirability constraints | |
| Y1: Foam expansion (FE) (%) | Maximize | |
| Y2: Foam volume stability (FVS) (%) | Maximize | |
| Y3: Foam liquid stability (FLS) (%) | Minimize | |
| Y4: Half-life (min) | Maximize | |
| Y5: Viscosity (cP) | Maximize /In Range | |
