Table 2.
Effect of thermal treatments on total psychrotrophic counts of OJK during storage (4°C)
| Storage (weeks) | Time (min) | Psychrotrophs | ||||
|---|---|---|---|---|---|---|
| (log1 0 CFU/ml ± SD) | ||||||
| Control | 50 | 60 | 70 | 80°C | ||
| 0 | 5 | *3.01a D ± 0.04 | 2.60b F ± 0.44 | 2.40c F ± 0.10 | 2.08d F ± 0.06 | 1.10e C ± 0.20 |
| 30 | 1.80b G ± 0.06 | 1.40c G ± 0.25 | 1.10d G ± 0.04 | 1.01eD ± 0.09 | ||
| 1 | 5 | 4.90a C ± 0.06 | 4.35b D ± 0.18 | 3.90c D ± 0.28 | 2.70d E ± 0.14 | 1.30e B ± 0.10 |
| 30 | 3.50b E ± 0.20 | 2.90c E ± 0.18 | 2.08d F ± 0.27 | 1.10e C ± 0.04 | ||
| 2 | 5 | 6.02a B ± 0.07 | 5.01b C ± 0.36 | 4.50c C ± 0.12 | 4.02d D ± 0.22 | 1.50e AB ± 0.08 |
| 30 | 4.90b CD ± 0.19 | 4.70b C ± 0.25 | 4.35c D ± 0.30 | 1.30d B ± 0.10 | ||
| 3 | 5 | 6.40a A ± 0.32 | 5.70b B ± 0.44 | 5.40c B ± 0.02 | 4.70d CD ± 0.16 | 1.45e AB ± 0.12 |
| 30 | 5.58b BC ± 0.29 | 5.10bc BC ± 0.09 | 5.03c C ± 0.14 | 1.30d B ± 0.17 | ||
| 4 | 5 | 6.70a A ± 0.18 | 6.30b A ± 0.18 | 6.10bc AB ± 0.16 | 5.70c B ± 0.82 | 1.40d AB ± 0.18 |
| 30 | 6.20b AB ± 0.08 | 6.00bc AB ± 0.12 | 5.10c C ± 0.09 | 1.30d B ± 0.08 | ||
| 5 | 5 | 6.70a A ± 0.18 | 6.45b A ± 0.10 | 6.20bc A ± 0.14 | 6.10c A ± 0.02 | 1.70d A ± 0.14 |
| 30 | 6.36ab A ± 0.10 | 6.15b A ± 0.02 | 6.07b A ± 0.20 | 1.45c AB ± 0.20 | ||
*
Means (±SD) followed by different superscripts (within columns) and different subscripts (within rows) are significantly different (p ≤ .05). OJK = orange juice with kiwi powder (0.3%, w/w).