. 2024 Apr 2;13(7):1093. doi: 10.3390/foods13071093

Table 2.

Color changes of black oranges under different aging fermentation processes.

Week	Group	L*	a*	b*	ΔE	A₄₂₀
0	F	60.37 ± 0.01 ^a	22.67 ± 0.02 ^a	37.03 ± 0.01 ^a	–	0.56 ± 0.01 ^d
2	NB	38.85 ± 0.01 ^b	11.63 ± 0.05 ^b	11.60 ± 0.02 ^c	36.46 ± 0.02 ^h	0.53 ± 0.01 ^e
	CA	36.65 ± 0.01 ^c	6.30 ± 0.03 ^d	14.30 ± 0.01 ^b	29.79 ± 0.02 ⁱ	0.43 ± 0.00 ^g
	AA	23.68 ± 0.02 ^g	4.98 ± 0.04 ^f	5.62 ± 0.01 ^g	51.37 ± 0.04 ^e	0.38 ± 0.00 ^h
4	NB	30.79 ± 0.03 ^d	9.36 ± 0.04 ^c	11.35 ± 0.02 ^d	46.89 ± 0.01 ^f	0.45 ± 0.01 ^f
	CA	25.78 ± 0.01 ^f	4.90 ± 0.00 ^g	9.35 ± 0.00 ^e	40.90 ± 0.01 ^g	0.38 ± 0.01 ^h
	AA	16.58 ± 0.00 ^h	0.75 ± 0.06 ⁱ	0.82 ± 0.02 ⁱ	60.83 ± 0.03 ^b	1.39 ± 0.03 ^b
6	NB	26.85 ± 0.05 ^e	5.57 ± 0.01 ^e	7.57 ± 0.01 ^f	53.05 ± 0.02 ^c	0.54 ± 0.02 ^e
	CA	14.39 ± 0.01 ^j	3.22 ± 0.01 ^h	4.38 ± 0.02 ^h	52.89 ± 0.03 ^d	0.61 ± 0.01 ^c
	AA	15.01 ± 0.02 ⁱ	0.28 ± 0.00 ^j	0.80 ± 0.02 ^j	62.11 ± 0.01 ^a	3.44 ± 0.07 ^a

Each value was expressed as mean ± standard deviation (n = 3). “a–j” means different letters in the same column have significant differences (p < 0.05). “–” means ΔE was not applicable to fresh samples. F, NB, CA, AA represent fresh, non-blanching and continuous aging, blanching and continuous aging, and hot air-assisted aging cycle, respectively.