Factors and levels of orthogonal experimental design.
| Levels | Factors | |||
|---|---|---|---|---|
| A | B | C | D | |
| PC : Chol (n/n) | PC : DSPE-mPEG2000 (n/n) | PC : LPC (n/n) | Ultrasonic time (min) | |
| 1 | 8 : 1 | 34 : 1 | 100 : 1 | 5 |
| 2 | 16 : 1 | 68 : 1 | 50 : 1 | 10 |
| 3 | 32 : 1 | 102 : 1 | 20 : 1 | 15 |
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