Table 4.

Summary of the rate constants (k) and activation energy (E_a) for color attributes pertaining to pecan nutmeat color of three different cultivars (Desirable, Pawnee, and Stuart) stored at different temperatures and relative humidities (replicates, n = 2).

Cultivars	Temp (°C)	RH (%)	Lightness			Hue			Chroma
			k (day−1)	Adj. R2	Ea (kJ/mol)	k (day−1)	Adj. R2	Ea (kJ/mol)	k (day−1)	Adj. R2	Ea (kJ/mol)
Desirable	20	30	0.006 ± 0.001	0.85	15.10 ± 13.52a	0.032 ± 0.001	0.95	29.16 ± 8.08 b	0.001 ± 0.003	0.68	23.83 ± 14.89a
	30		0.012 ± 0.008	0.98		0.066 ± 0.001	0.87		0.011 ± 0.006	0.91
	40		0.019±0.023	0.89		0.157 ± 0.037	0.91		0.025 ± 0.034	0.85
	20	50	0.013 ± 0.003	0.94	11.33 ± 16.02a	0.033 ± 0.006	0.78	30.34 ± 3.75 b	0.018 ± 0.013	0.8	16.23 ± 22.95a
	30		0.021 ± 0.001	0.98		0.082 ± 0.012	0.93		0.017 ± 0.012	0.99
	40		0.040 ± 0.009	0.94		0.178 ± 0.019	0.77		0.047 ± 0.007	0.9
	20	75	0.041 ± 0.001	0.94	12.64 ± 6.65a	0.045 ± 0.009	0.82	40.87 ± 1.25 ab	0.053 ± 0.002	0.85	22.60 ± 5.94a
	30		0.039 ± 0.043	0.92		0.164 ± 0.016	0.86		0.077 ± 0.002	0.77
	40		0.061 ± 0.020	0.97		0.474 ± 0.021	0.97		0.105 ± 0.12	0,92
	20	80	0.156 ± 0.116	0.95	10.77 ± 12.96a	0.050 ± 0.017	0.52	57.30 ± 7.78a	0.268 ± 0.005	0.89	24.86 ± 4.56a
	30		0.118 ± 0.166	0.94		0.324 ± 0.028	0.89		0.209 ± 0.247	0.93
	40		0.348 ± 0.076	0.96		1.048 ± 0.175	0.96		0.402 ± 0.013	0.95
Pawnee	20	30	0.010 ± 0.003	0.89	22.10 ± 0.19a	0.039 ± 0.005	0.85	20.08 ± 1.69 b	0.008 ± 0.009	0.63	23.32 ± 8.24a
	30		0.014 ± 0.006	0.93		0.052 ± 0.006	0.76		0.016 ± 0.021	0.81
	40		0.017 ± 0.010	0.88		0.140 ± 0.021	0.83		0.040 ± 0.011	0.86
	20	50	0.006 ± 0.006	0.97	15.27 ± 6.76a	0.027 ± 0.005	0.78	27.51 ± 4.77 ab	0.014 ± 0.002	0.92	12.81 ± 1.38a
	30		0.031 ± 0.002	0.99		0.081 ± 0.007	0.85		0.035 ± 0.002	0.99
	40		0.039 ± 0.002	0.99		0.127 ± 0.014	0.97		0.053 ± 0.010	0.99
	20	75	0.043 ± 0.001	0.86	10.26 ± 0.29a	0.054 ± 0.007	0.92	37.61 ± 0.92a	0.069 ± 0.020	0.82	14.89 ± 6.77a
	30		0.060 ± 0.028	0.93		0.130 ± 0.020	0.86		0.082 ± 0.013	0.66
	40		0.064 ± 0.005	0.97		0.492 ± 0.005	0.99		0.110 ± 0.014	0.92
	20	80	0.153 ± 0.005	0.82	18.00 ± 0.71a	0.171 ± 0.018	0.97	37.44 ± 3.83a	0.243 ± 0.058	0.95	8.70 ± 6.74a
	30		0.231 ± 0.034	0.97		0.312 ± 0.003	0.9		0.351 ± 0.031	0.95
	40		0.412 ± 0.122	0.95		0.959 ± 0.121	0.84		0.385 ± 0.051	0.94
Stuart	20	30	0.012 ± 0.001	0.99	19.55 ± 14.34a	0.043 ± 0.006	0.99	26.19 ± 3.75bc	0.010 ± 0.005	0.88	26.08 ± 26.57a
	30		0.020 ± 0.007	0.98		0.067 ± 0.011	0.93		0.024 ± 0.016	0.93
	40		0.029 ± 0.025	0.95		0.166 ± 0.016	0.92		0.042 ± 0.036	0.95
	20	50	0.008 ± 0.001	0.88	19.38 ± 2.16a	0.039 ± 0.005	0.88	22.28 ± 4.90c	0.021 ± 0.003	0.76	25.87 ± 13.87a
	30		0.023 ± 0.008	0.96		0.087 ± 0.014	0.87		0.024 ± 0.012	0.92
	40		0.041 ± 0.004	0.97		0.130 ± 0.006	0.96		0.039 ± 0.042	0.9
	20	75	0.013 ± 0.013	0.89	25.38 ± 20.41a	0.045 ± 0.011	0.8	42.75 ± 5.41 ab	0.034 ± 0.007	0.59	28.05 ± 1.16a
	30		0.037 ± 0.007	0.97		0.122 ± 0.001	0.86		0.042 ± 0.046	0.87
	40		0.100 ± 0.064	0.97		0.489 ± 0.040	0.99		0.153 ± 0.031	0.93
	20	80	0.182 ± 0.018	0.91	6.53 ± 3.14a	0.064 ± 0.022	0.18	46.44 ± 1.15a	0.386 ± 0.006	0.95	7.63 ± 1.40a
	30		0.261 ± 0.037	0.94		0.325 ± 0.039	0.95		0.373 ± 0.030	0.9
	40		0.287 ± 0.036	0.97		1.315 ± 0.103	0.95		0.431 ± 0.025	0.94

The values are tabulated as mean ± standard deviation (n = 2). k (rate constant), E_a (Activation Energy). E_a's with different letters indicate significant difference between estimated values (along column) based on Tukey's HSD (α = 0.05).