Table 1 Experimental matrix of the Plackett–Burman design and the response (cell count) of P72N after 24 h incubation. X1 beef extract; X2 yeast extract; X3 sweet Whey. (+ 1), highest concentration of variable; (− 1), lowest concentration of variable. Data are presented as the mean ± standard deviation of three replicates.
Run | X1 (g/L) | X2 (g/L) | X3 (g/L) | Cell count (log CFU/mL) |
|---|---|---|---|---|
1 | -1 (10) | + 1 (20) | -1 (75) | 8.90 ± 0.05 |
2 | + 1 (20) | -1 (10) | + 1 (125) | 8.70 ± 0.06 |
3 | + 1 (20) | -1 (10) | + 1 (125) | 8.73 ± 0.06 |
4 | + 1 (20) | + 1 (20) | + 1 (125) | 8.90 ± 0.11 |
5 | + 1 (20) | -1 (10) | -1 (75) | 8.77 ± 0.11 |
6 | -1 (10) | -1 (10) | -1 (75) | 8.72 ± 0.04 |
7 | + 1 (20) | + 1 (20) | -1 (75) | 8.96 ± 0.08 |
8 | + 1 (20) | + 1 (20) | -1 (75) | 8.99 ± 0.12 |
9 | -1 (10) | -1 (10) | -1 (75) | 8.72 ± 0.04 |
10 | -1 (10) | + 1 (20) | + 1 (125) | 8.95 ± 0.13 |
11 | -1 (10) | -1 (10) | + 1 (125) | 8.70 ± 0.10 |
12 | -1 (10) | + 1 (20) | + 1 (125) | 8.96 ± 0.10 |
