. 2019 Dec 30;99(1):604–611. doi: 10.3382/ps/pez546

Table 5.

Effect of rice protein concentrate (RPC) coatings enriched with essential oils tea tree (TEA), copaiba (COP), or thymo (THY) on yolk pH during 6 wk of storage at 20°C.^¹

Week	Control	RPC	RPC+TEA	RPC+COP	RPC+THY
0	6.22 ± 0.15^C,^a	6.24 ± 0.15^C,^a	6.24 ± 0.15^B,^a	6.24 ± 0.15^C,^a	6.24 ± 0.15^C,^a
1	6.47 ± 0.14^B,^a	6.30 ± 0.12^C,^a,b	6.14 ± 0.32^B,^a,b	6.12 ± 0.21^C,^a,b	6.29 ± 0.26^B,^b
2	6.59 ± 0.17^B,^a	6.45 ± 0.19^C,^a	6.42 ± 0.23^B,^a	6.46 ± 0.50^B,^a	6.46 ± 0.51^A,^a
3	6.92 ± 0.05^A,^a	6.45 ± 0.23^C,^b	6.42 ± 0.49^B,^b	6.44 ± 0.37^B,B	6.53 ± 0.31^B,^b
4	6.96 ± 0.04^A,^a	6.50 ± 0.10^B,C,^b	6.50 ± 0.47^B,^b	6.52 ± 0.29^A,^b	6.50 ± 0.43^A,^b
5	6.97 ± 0.03^A,^a	6.75 ± 0.20^A,B,^b	6.59 ± 0.80^A,^b	6.66 ± 0.30^A,^b	6.56 ± 0.22^A,^b
6	7.05 ± 0.04^A,^a,b	6.81 ± 0.06^A,^a	6.58 ± 0.36^A,^b	6.60 ± 0.41^A,^b	6.64 ± 0.22^A,^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).