Table 1.
The counts of total aerobic bacteria (TAB) and yeasts and molds (Y&M) in the milk after HHP treatments with different pressures (400, 500 and 600 MPa) and processing times (2.5, 5, 7.5, 10 and 15 min) at 25 °C, compared to the untreated milk.
| Processing Time (min) | TAB (lgCFU/mL) | Y&M (lgCFU/mL) | |
|---|---|---|---|
| Untreated | 4.19 ± 0.08 m | 1.82 ± 0.16 a | |
| 400 MPa | 2.5 | 3.84 ± 0.09 l | 0.09 ± 0.12 b |
| 5 | 3.38 ± 0.09 k | ND | |
| 7.5 | 2.90 ± 0.01 j | ND | |
| 10 | 2.85 ± 0.10 ij | ND | |
| 15 | 2.81 ± 0.09 ij | ND | |
| 500 MPa | 2.5 | 2.74 ± 0.05 hi | ND |
| 5 | 2.65 ± 0.07 gh | ND | |
| 7.5 | 2.57 ± 0.08 fg | ND | |
| 10 | 2.49 ± 0.01 ef | ND | |
| 15 | 2.41 ± 0.02 e | ND | |
| 600 MPa | 2.5 | 2.20 ± 0.04 d | ND |
| 5 | 1.99 ± 0.09 c | ND | |
| 7.5 | 1.41 ± 0.09 b | ND | |
| 10 | 1.31 ± 0.27 b | ND | |
| 15 | 1.12 ± 0.06 a | ND |
ND, no detected (detection limit <1 CFU/mL). Values in the same column with different superscript letters indicate significant differences (p < 0.05).