Table 4 Factors and levels in response surface analysis
From: Efficient extraction and antioxidant activity of polyphenols from Antrodia cinnamomea
Factors | Levels | ||
|---|---|---|---|
− 1 | 0 | 1 | |
A. Ratio of the material liquid (mg/mL) | 10 | 30 | 50 |
B. The water content (%) | 0 | 20 | 40 |
C. Extraction temperature (°C) | 40 | 60 | 80 |
D. Extraction time (%) | 40 | 70 | 100 |