. 2019 Jun 18;5(6):e01917. doi: 10.1016/j.heliyon.2019.e01917

Table 1.

Effect of storage under simulated home-refrigerated conditions at 4 °C on color analysis of cold-pressed juices.

	Fresh	Day 1	Day 2	Day 3	Day 4	Day 5	Day 6	Day 7
Lightness (L^∗)
Pineapple	34.02 ± 0.56^ab	34.49 ± 0.87^ab	35.22 ± 0.59^a	33.98 ± 0.83^ab	34.49 ± 0.76^ab	33.50 ± 1.01^b	35.29 ± 0.78^a	35.45 ± 0.73^a
Guava	43.61 ± 0.13^b	44.01 ± 0.6^ab	44.38 ± 0.23^a	44.39 ± 0.43^a	44.46 ± 0.43^a	43.72 ± 0.4^b	43.81 ± 0.32^b	43.65 ± 0.4^b
Carrot	35.09 ± 0.54^a	33.54 ± 1.08^b	33.83 ± 0.87^b	33.08 ± 0.65^bc	33.12 ± 0.43^bc	32.49 ± 0.83^c	33.35 ± 0.64^b	35.78 ± 0.43^a
White dragon fruit	33.56 ± 0.21^a	29.63 ± 0.67^c	30.47 ± 1.32^c	31.87 ± 0.78^b	32.15 ± 0.54^b	31.99 ± 0.32^b	31.97 ± 0.42^b	31.90 ± 0.43^b
Red dragon fruit	22.37 ± 0.89^a	21.87 ± 1.07^a	21.98 ± 0.96^a	22.99 ± 1.87^a	22.67 ± 0.95^a	23.08 ± 2.06^a	22.31 ± 0.92^a	22.79 ± 0.64^a
Redness/greenness (a^∗)
Pineapple	−3.75 ± 0.09^a	−3.58 ± 0.08^ab	−3.18 ± 0.08^b	−3.44 ± 0.09^ab	−2.97 ± 0.09^c	−3.2 ± 0.1^b	−2.91 ± 0.11^c	−2.82 ± 0.13^c
Guava	−5.59 ± 0.11^ab	−5.43 ± 0.2^b	−5.45 ± 0.09^b	−5.57 ± 0.08^ab	−5.77 ± 0.08^a	−5.36 ± 0.09^b	−5.45 ± 0.08^b	−5.41 ± 0.09^b
Carrot	3.74 ± 0.11^b	3.35 ± 0.2^b	3.59 ± 0.09^b	3.51 ± 0.08^b	3.61 ± 0.098^b	3.74 ± 0.09^b	3.68 ± 0.1^b	4.97 ± 0.21^a
White dragon fruit	−0.93 ± 0.1^ab	−1.03 ± 0.09^a	−0.66 ± 0.08^bc	−0.76 ± 0.11^bc	−0.69 ± 0.089^bc	−0.7 ± 0.09^bc	−0.67 ± 0.11^bc	−0.73 ± 0.13^bc
Red dragon fruit	4.92 ± 0.32^a	4.84 ± 0.08^a	5.11 ± 0.53^a	4.88 ± 0.31^a	4.99 ± 0.46^a	4.67 ± 0.11^a	4.78 ± 0.23^a	5.08 ± 0.07^a
Yellowness/blueness (b^∗)
Pineapple	6.49 ± 0.1^a	6.50 ± 0.11^a	5.77 ± 0.23^b	5.60 ± 0.21^b	4.56 ± 0.23^c	4.58 ± 0.22^c	2.63 ± 0.1^d	2.75 ± 0.22^d
Guava	3.23 ± 0.09^a	3.1 ± 0.08^a	3.09 ± 0.09^a	3.2 ± 0.088^a	3.23 ± 0.08^a	2.4 ± 0.16^b	2.57 ± 0.11^b	2.54 ± 0.09^b
Carrot	15.87 ± 0.43^bc	15.71 ± 0.34^bc	16.03 ± 0.45^b	15.16 ± 0.44^c	15.69 ± 0.39^bc	15.50 ± 0.23^bc	15.58 ± 0.32^bc	16.91 ± 0.49^a
White dragon fruit	−0.97 ± 0.1^a	−1.01 ± 0.089^a	−1.16 ± 0.09^a	−0.22 ± 0.088^b	−0.2 ± 0.03^b	−0.09 ± 0.007^c	−0.08 ± 0.007^c	0.07 ± 0.004^c
Red dragon fruit	0.32 ± 0.07^ab	0.27 ± 0.03^b	0.31 ± 0.08^ab	0.32 ± 0.05^ab	0.28 ± 0.03^b	0.33 ± 0.04^a	0.34 ± 0.09^a	0.33 ± 0.05^a
Color difference (ΔE)
Pineapple		1.46 ± 0.11^c	1.58 ± 0.22^c	1.17 ± 0.32^c	2.16 ± 0.27^b	2.16 ± 0.31^b	2.42 ± 0.3^b	3.2 ± 0.15^a
Guava		0.59 ± 0.11^a	0.81 ± 0.13^a	0.78 ± 0.22^a	0.87 ± 0.24^a	0.92 ± 0.31^a	0.75 ± 0.22^a	0.73 ± 0.35^a
Carrot		1.62 ± 0.32^ab	1.29 ± 0.22^b	2.15 ± 0.21^ab	2.00 ± 0.13^ab	2.63 ± 0.32^a	1.79 ± 0.45^ab	1.78 ± 0.76^ab
White dragon fruit		3.93 ± 0.67^a	3.11 ± 0.45^a	1.92 ± 0.33^b	1.66 ± 0.43^b	1.89 ± 0.19^b	1.89 ± 0.42^b	1.96 ± 0.52^b
Red dragon fruit		0.36 ± 0.04^a	0.41 ± 0.09^a	0.35 ± 0.08^a	0.34 ± 0.07^a	0.35 ± 0.06^a	0.32 ± 0.07^a	0.33 ± 0.06^a

Data are presented as the mean ± standard deviation (SD) of three independent replicates.

For each measured parameter, values in the same row followed by different superscripted letters are significantly different according to Duncan's multiple-range test (p < 0.05).