Research Article
Essential Oil Extracted from Cymbopogon citronella Leaves by Supercritical Carbon Dioxide: Antioxidant and Antimicrobial Activities
Table 2
Full factorial BBD matrix of three variables in coded units and the experimentally observed response.
| Runs | X1 | X2 | X3 | X4 | Extraction yield (%) |
| 1 | 110 | 22 | 35 | 18 | 4.29 | 2 | 110 | 28 | 35 | 18 | 4.21 | 3 | 130 | 22 | 35 | 18 | 4.23 | 4 | 130 | 28 | 35 | 18 | 4.32 | 5 | 120 | 25 | 32 | 16 | 4.06 | 6 | 120 | 25 | 32 | 20 | 3.91 | 7 | 120 | 25 | 38 | 16 | 3.89 | 8 | 120 | 25 | 38 | 20 | 3.92 | 9 | 110 | 25 | 35 | 16 | 4.26 | 10 | 110 | 25 | 35 | 20 | 4.11 | 11 | 130 | 25 | 35 | 16 | 4.19 | 12 | 130 | 25 | 35 | 20 | 4.15 | 13 | 120 | 22 | 32 | 18 | 4.07 | 14 | 120 | 22 | 38 | 18 | 3.94 | 15 | 120 | 28 | 32 | 18 | 4.06 | 16 | 120 | 28 | 38 | 18 | 3.98 | 17 | 110 | 25 | 32 | 18 | 3.95 | 18 | 110 | 25 | 38 | 18 | 4.02 | 19 | 130 | 25 | 32 | 18 | 4.08 | 20 | 130 | 25 | 38 | 18 | 4.04 | 21 | 120 | 22 | 35 | 16 | 4.26 | 22 | 120 | 22 | 35 | 20 | 4.11 | 23 | 120 | 28 | 35 | 16 | 4.19 | 24 | 120 | 28 | 35 | 20 | 4.22 | 25 | 120 | 25 | 35 | 18 | 4.37 | 26 | 120 | 25 | 35 | 18 | 4.36 | 27 | 120 | 25 | 35 | 18 | 4.35 |
|
|