Table 4.
Effect of rice protein concentrate (RPC) coatings enriched with essential oils tea tree (TEA), copaiba (COP), or thymo (THY) on pH during 6 wk of storage at 20°C.¹
| Week | Control | RPC | RPC+TEA | RPC+COP | RPC+THY |
|---|---|---|---|---|---|
| 0 | 8.05 ± 0.02E,a | 8.05 ± 0.02F,a | 8.05 ± 0.02C,a | 8.05 ± 0.02D,a | 8.05 ± 0.02C,a |
| 1 | 8.33 ± 0.19D,a | 8.09 ± 0.05E,b | 8.14 ± 0.16B,C,a,b | 8.07 ± 0.17C,D,a,b | 8.07 ± 0.07C,b |
| 2 | 8.71 ± 0.05C,a | 8.37 ± 0.06D,b | 8.24 ± 0.09A,b | 8.22 ± 0.10C,b | 8.26 ± 0.07A,b |
| 3 | 9.08 ± 0.04B,a | 8.48 ± 0.10C,b | 8.18 ± 0.10B,b | 8.13 ± 0.08A,B,b | 8.13 ± 0.11B,b |
| 4 | 9.21 ± 0.06B,a | 9.09 ± 0.07B,c | 9.23 ± 0.12A,a | 9.16 ± 0.04A,a,b | 9.16 ± 0.07A,a,b |
| 5 | 9.44 ± 0.16A,a | 9.16 ± 0.06A,B,b,c | 9.24 ± 0.09A,b | 9.06 ± 0.08B,c | 9.16 ± 0.08A,b,c |
| 6 | 9.48 ± 0.11A,a | 9.20 ± 0.04A,b | 9.26 ± 0.10A,b | 9.16 ± 0.08A,b | 9.19 ± 0.04A,b |
¹
Data are expressed as means ± standard deviations. Information was collected in 12 eggs per treatment. Statistical models included the effects of treatments (P < 0.001), storage periods (P < 0.001), and interaction (treatments by storage periods, P < 0.001).
a-d
Means in the same row with different lowercase letters are significantly different (P < 0.001).
A-C
Means in the same column with different capital letters are significantly different (P < 0.001).