Table 3.
Response variables and their fitted model equations.
| Symbol | Response Variable | Quadratic Equation |
|---|---|---|
| YTPC | Total phenolic compounds (mg GAE/g DW) |
8.71 + 0.68X1 + 0.23X2 + 0.61X3 + 0.38X4 − 0.29X1X2 − 0.067X1X3 + 0.12X1X4 − 0.20X2X3 + 0.11X2X4 + 0.33X3X4 − 0.35X12 − 0.73X22 − 0.44X32 − 0.064X42 |
| YAA | DPPH (%) |
76.03 + 7.52X1 + 3.23X2 + 7.78X3 + 4.18X4 − 2.99X1X2 − 2.23X1X3 − 0.61X1X4 − 0.84X2X3 − 3.50X2X4 + 2.69X3X4 − 7.13X12 − 5.38X22 − 6.26X32 − 0.34X42 |
X1: Temperature (°C); X2: Ethanol concentration (%); X3: Extraction time (min); X4: Untrasonic power (W).