Table 2. Kinetic models for quality attributes of ginseng stored at different temperatures

	Storage temp. (°C)	Zeroth-order			First-order			Second-order
		k1)	R2 2)	RMSE3)	k	R2	RMSE	k	R2	RMSE
Texture	5	14.26	0.270	210.55	0.008	0.262	189.55	3.0×10−6	0.311	195.45
	20	17.69	0.453	218.62	0.011	0.554	175.01	4.0×10−6	0.520	193.33
	35	63.33	0.809	143.96	0.033	0.789	149.03	1.7×10−5	0.772	153.76
Weight loss	5	−0.003	0.582	0.027	−0.010	0.587	0.028	−3.4×10−2	0.594	0.028
	20	−0.092	0.983	0.403	−0.070	0.957	0.356	−6.9×10−2	0.772	0.999
	35	−0.244	0.950	0.562	−0.096	0.978	0.298	−3.8×10−2	0.959	0.289
WSP4)	5	−0.066	0.401	0.91	−0.013	0.391	0.94	−2.4×10−3	0.374	0.98
	20	−0.086	0.418	1.09	−0.015	0.381	1.18	−2.7×10−3	0.351	1.27
	35	−0.939	0.651	5.46	−0.115	0.845	3.98	−1.4×10−2	0.978	1.84
CSP5)	5	−0.079	0.349	4.62	−0.002	0.346	4.62	−2.3×10−3	0.031	149.93
	20	−0.258	0.665	4.16	−0.006	0.653	4.16	−2.3×10−3	0.161	152.27
	35	−0.621	0.701	3.87	−0.016	0.721	3.78	−4.1×10−4	0.739	3.68
NSP6)	5	0.28	0.540	3.14	0.006	0.551	3.06	−2.5×10−3	0.549	183.78
	20	0.48	0.632	4.86	0.012	0.613	4.94	−2.5×10−3	0.147	183.18
	35	1.21	0.269	6.27	0.031	0.293	6.00	7.9×10−4	0.322	5.73
Hemicellulose	5	0.06	0.074	1.31	0.005	0.075	1.30	4.4×10−4	0.076	1.29
	20	0.14	0.226	2.14	0.014	0.246	2.02	1.5×10−3	0.271	1.90
	35	0.59	0.728	1.61	0.074	0.796	1.29	9.0×10−3	0.835	1.10
Cellulose	5	−2.16	0.862	13.82	−0.015	0.859	13.68	−1.1×10−4	0.846	14.41
	20	−4.22	0.801	31.30	−0.024	0.728	39.97	−1.5×10−4	0.651	48.67
	35	−11.59	0.813	26.09	−0.064	0.710	35.23	−3.7×10−4	0.602	44.78
Starch	5	3.375	0.426	42.950	0.008	0.449	41.2	1.7×10−5	0.472	39.520
	20	3.616	0.452	48.214	0.008	0.457	47.5	1.8×10−5	0.461	46.878
	35	7.767	0.640	31.692	0.017	0.649	31.5	3.7×10−5	0.654	31.460
PC1 score	5	−0.065	0.877	0.352	0.054	0.916	0.4	−3.8×10−2	0.877	0.458
	20	−0.136	0.873	0.800	0.268	0.669	1.3	−7.6×10−1	0.526	1.372
	35	−0.404	0.919	0.648	0.900	0.789	1.7	−2.90	0.774	1.701

k, kinetic rate constant;
R², coefficient of determination;
RMSE, root mean square error.
WSP, water-soluble pectin;
CSP, CDTA-soluble pectin;
NSP, Na₂CO₃-soluble pectin.