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Table 4 Orthogonal test factors and level tables
From: Dynamic changes of secondary metabolites and tyrosinase activity of Malus pumila flowers
| Level | Factor | ||
|---|---|---|---|
| A Solid–liquid ratio (times) | B Ultrasound time (min) | C Centrifugal speed (r/min) | |
| 1 | 1:120 | 10 | 6000 |
| 2 | 1:100 | 20 | 8000 |
| 3 | 1:80 | 30 | 10,000 |
