Influence of Light Exposure during Cold Storage of Minimally Processed Vegetables (Valeriana sp.)

Table 2

Physicochemical parameters of pretreated leaves of Valeriana stored in dark condition. 

Analyses on samples		Storage days in dark condition
		0	3	7	10	16	Sig.
Dry matter (%)	T1	6.63 ± 0.41	6.63 ± 0.13	6.23 ± 0.04	6.49 ± 0.20	6.69 ± 0.58	n.s.
	T2	6.53 ± 0.02^ab	6.56 ± 0.07^ab	6.76 ± 0.26^ab	6.82 ± 0.04^a	7.06 ± 0.24^a
	T3	6.92 ± 0.00^a	6.77 ± 0.04^ab	6.29 ± 0.00^c	6.48 ± 0.06^bc	6.69 ± 0.15^ab
pH	T1	6.60 ± 0.06	6.34 ± 0.02	6.18 ± 0.18	6.34 ± 0.33	6.06 ± 0.13	n.s.
	T2	6.8 ± 0.02^a	6.42 ± 0.01^c	6.50 ± 0.03^bc	6.45 ± 0.01^bc	6.54 ± 0.04^b
	T3	6.70 ± 0.04^ab	6.32 ± 0.01^d	6.80 ± 0.06^a	6.53 ± 0.03^c	6.66 ± 0.05^abc
aw	T1	0.979 ± 0.001^c	0.984 ± 0.002^ab	0.981 ± 0.001^bc	0.986 ± 0.000^a	0.980 ± 0.000^bc
	T2	0.980 ± 0.000^bc	0.981 ± 0.001^bc	0.982 ± 0.001^b	0.986 ± 0.000^a	0.979 ± 0.000^c
	T3	0.980 ± 0.001^ab	0.982 ± 0.001^ab	0.982 ± 0.000^a	0.981 ± 0.000^ab	0.979 ± 0.000^bc
Browning index	T1	37.00 ± 5.77	36.98 ± 5.81	38.63 ± 5.14	39.19 ± 6.13	38.28 ± 9.05	n.s.
	T2	40.22 ± 6.59	38.32 ± 8.11	38.13 ± 6.22	34.30 ± 6.87	32.15 ± 6.88	n.s.
	T3	36.76 ± 6.01	37.09 ± 6.83	41.81 ± 8.94	32.89 ± 11.34	36.83 ± 9.38	n.s.
Hue angle	T1	112.03 ± 3.16	111.65 ± 2.83	112.39 ± 2.55	113.51 ± 2.80	108.03 ± 5.20	n.s.
	T2	110.85 ± 2.56	111.47 ± 1.49	112.85 ± 2.78	112.74 ± 2.08	112.92 ± 2.95	n.s.
	T3	112.45 ± 2.84	110.93 ± 2.85	111.43 ± 3.24	115.97 ± 7.20	112.04 ± 1.95	n.s.
TEAC (µM·TE·g^−1)	T1	268.51 ± 33.30	320.86 ± 27.67	284.03 ± 76.91	271.63 ± 44.64	320.60 ± 4.03	n.s.
	T2	285.12 ± 20.43	391.33 ± 11.39	308.04 ± 41.46	317.03 ± 39.73	364.82 ± 77.13
	T3	385.06 ± 20.26	386.38 ± 44.36	351.13 ± 61.00	292.98 ± 44.28	311.81 ± 30.62	n.s.
DPPH assay (% of inhibition)	T1	20.19 ± 1.78	22.43 ± 6.52	21.00 ±  0.391	7.83 ± 0.83	19.94 ± 1.59	n.s.
	T2	20.16 ± 0.15^ab	25.10 ± 0.19^a	20.23 ± 4.22^ab	14.59 ± 1.73^b	20.38 ± 3.27^ab
	T3	23.10 ± 0.54^ab	24.79 ± 3.61^a	20.81 ± 0.39^ab	15.83 ± 3.35^ab	16.90 ± 3.97^ab
Total phenolic content (mg gallic acid g^−1)	T1	1016 ± 4.54	1168 ± 240.02	1111 ± 173.36	1271 ± 117.04	1404 ± 38.32	n.s.
	T2	1108 ± 72.66	1147 ± 2.68	1313 ± 255.70	1222 ± 238.02	1347 ± 26.41	n.s.
	T3	1264 ± 25.44	1345 ± 232.15	1070 ± 141.16	1060 ± 158.10	1294 ± 142.36	n.s.

Results are presented as the mean value ± standard deviation. n = 2; means within a row with different letters are significantly different by Tukey’s post hoc test; significance at ; significance at ; n.s.: not significant.