Heterogeneity of the remaining lifespan of table grapes in refrigerated transportation

OLIVEIRA, Cíntia Carla Melgaço de; OLIVEIRA, Davi Rocha Bernardes de; SPAGNOL, Wigberto Antonio; TAVARES, Lucas Ramos; SILVEIRA JUNIOR, Vivaldo

doi:10.1590/fst.05821

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Food Science and Technology

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Original Article • Food Sci. Technol (Campinas) 42 • 2022 • https://doi.org/10.1590/fst.05821 copy

Heterogeneity of the remaining lifespan of table grapes in refrigerated transportation

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

This work aimed to show heterogeneities in shelf life of table grapes from a same batch during road refrigerated transportation. The monitoring of temperature and relative humidity of air was done with a wireless sensor network strategically distributed among grapes boxes and pallets. The ambient conditions and time of exposure were associated with a linear predictive model of water loss in order to estimate fruits shelf life. Results showed that the loss of dynamic life of grapes varied according to the box position on different pallets within the refrigerated transport vehicle, due to differences in the conditions that fruits were exposed to. It was observed high heterogeneity in shelf life of the evaluated batch of grapes during transportation, with differences of 71 days between grape boxes. With that, one can conclude that these differences must be taken into account in the following stages of grapes cold chain.

Keywords:
refrigerated transport; ambient condition; wireless sensors network; predictive model; water loss; shelf life

Position	Mean values^* * Mean values followed by the same letter in the same column do not differ statistically at a significance level of 5%.
Position	Temperature (°C)	Relative Humidity (%)
Lower left side (D02)	9.7 ± 0.7 ^a	64.1 ± 3.2 ^c
Lower center (D02)	4.2 ± 0.6 ^c	90.9 ± 4.7 ^a
Upper center (E20)	5.8 ± 0.9 ^b	81.4 ± 4.5 ^b
Upper right side (E20)	8.5 ± 1.2 ^a	63.2 ± 4.2 ^c
Parallel to door (B02 e C22)	8.8 ± 0.1^a	66.3 ± 0.1 ^c

Pallets	Mean values^* * Values followed by the same letter on the same variable on the same pallet do not differ statistically at 5% of significance level;
Pallets	Temperature (°C)	Relative Humidity (%)	Temperature (°C)	Relative Humidity (%)
01	Sensor 01 (D02)		Sensor 02 (E20)
01	9.2 ± 0.5 ^a	67.1 ± 5.2 ^a	6.1 ± 2.7 ^a	85.7 ± 11.2 ^a
04	Sensor 03 (D02)		Sensor 04 (E20)
04	4.6 ± 0.5 ^b	97.7 ± 3.7 ^a	7.4 ± 1.5 ^a	69.0 ± 6.1 ^b
05	Sensor 05 (D02)		Sensor 06 (E20)
05	9.0 ± 0.7 ^a	66.6 ± 5.0 ^b	4.8 ± 1.7 ^b	87.8 ± 3.6 ^a
08	Sensor 07 (D02)		Sensor 08 (E20)
08	3.3 ± 0.7 ^b	92.2 ± 7.9 ^a	7.7 ± 1.4 ^a	61.5 ± 7.5 ^b
09	Sensor 09 (D02)		Sensor 10 (E20)
09	10.0 ± 0.5 ^a	63.6 ± 6.3 ^a	5.5 ± 2.0 ^b	76.6 ± 11.3 ^a
12	Sensor 11 (D02)		Sensor 12 (E20)
12	4.3 ± 0.8 ^b	87.4 ± 8.0 ^a	10.2 ± 1.1 ^a	59.5 ± 7.7 ^b
13	Sensor 13 (D02)		Sensor 14 (E20)
13	8.9 ± 0.8 ^a	68.0 ± 6.4 ^a	4.9 ± 2.4 ^a	82.5 ± 10.1 ^a
16	Sensor 15 (D02)		Sensor 16 (E20)
16	4.1 ± 0.5 ^b	90.4 ± 5.3 ^a	9.8 ± 0.9 ^a	61.5 ± 9.7 ^b
17	Sensor 17 (D02)		Sensor 18 (E20)
17	10.2 ± 1.1 ^a	62.2 ± 6.8 ^a	5.7 ± 1.4 ^b	80.3 ± 10.3 ^a
20	Sensor 19 (D02)		Sensor 20 (E20)
20	3.8 ± 0.5 ^b	95.2 ± 5.0 ^a	8.8 ± 1.5 ^a	58.9 ± 6.3 ^b
21	Sensor 21 (D02)		Sensor 22 (E20)
21	11.0 ± 0.8 ^a	60.0 ± 6.7 ^b	5.8 ± 1.8 ^b	81.5 ± 8.1 ^a
24	Sensor 23 (D02)		Sensor 24 (E20)
24	4.2 ± 0.6 ^b	89.6 ± 8.1 ^a	8.0 ± 1.8 ^a	62.9 ± 5.3 ^b
25	Sensor 25 (D02)		Sensor 26 (E20)
25	9.6 ± 0.9 ^a	60.9 ± 8.3 ^a	7.6 ± 1.2 ^a	75.3 ± 10.6 ^a
28^ Comparison with the reference sensor 30 (C22) in pallet 28 (T = 8.9 ± 2.1 a (°C); RH = 66.3 ± 9.5 a (%)).	Sensor 27 (D02)		Sensor 28 (E20)
	5.0 ± 0.8 ^a	83.8 ± 2.7 ^a	7.3 ± 2.1 ^a	69.1 ± 7.7 ^a

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[1] *Corresponding author: cintiamelgaco@hotmail.com