Influence of water loss on mechanical properties of stored blueberries

Rivera, Sebastián; Kerckhoffs, Huub; Sofkova-Bobcheva, Svetla; Hutchins, Dan; East, A.R.

doi:10.1016/j.postharvbio.2021.111498

Cited by 29 publications

(30 citation statements)

References 65 publications

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“…Figure 2D shows the result of the hardness test. A generally linear negative correlation was found between the hardness and storage time, which was mainly induced by the loss of water as well ( Rivera et al, 2021 ). As the variances of the experimental data were relatively small, the hardness might be useful to distinguish the oranges into different storage periods.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 4B compares the cross-section of the rinds on Day 0, 20, and 40, which further confirms that the elimination of oil was the key factor that turned the glands flat or even concave. Moreover, the rind itself also experienced the loss of water during postharvest storage and became thinner, which would decrease the rind turgor and result in the rind compaction ( Rivera et al, 2021 ). As this process is in conjunction with the evolution of the oil glands, the gland characteristics can be used as an indicator of the rind status that can be easily quantified, which will be discussed in detail in “Modeling and Analysis.” Compared with other indexes to indicate the rind status such as the rind turgor and water potential, the proposed new indicator can be obtained immediately using images in a non-destructive manner, which can be conveniently adopted in real-world applications for storage time prediction.…”

Section: Resultsmentioning

confidence: 99%

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Non-destructive Storage Time Prediction of Newhall Navel Oranges Based on the Characteristics of Rind Oil Glands

Shu-min

Kang

et al. 2022

Front. Plant Sci.

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How to non-destructively and quickly estimate the storage time of citrus fruit is necessary and urgent for freshness control in the fruit market. As a feasibility study, we present a non-destructive method for storage time prediction of Newhall navel oranges by investigating the characteristics of the rind oil glands in this paper. Through the observation using a digital microscope, the oil glands were divided into three types and the change of their proportions could indicate the rind status as well as the storage time. Images of the rind of the oranges were taken in intervals of 10 days for 40 days, and they were used to train and test the proposed prediction models based on K-Nearest Neighbors (KNN) and deep learning algorithms, respectively. The KNN-based model demonstrated explicit features for storage time prediction based on the gland characteristics and reached a high accuracy of 93.0%, and the deep learning-based model attained an even higher accuracy of 96.0% due to its strong adaptability and robustness. The workflow presented can be readily replicated to develop non-destructive methods to predict the storage time of other types of citrus fruit with similar oil gland characteristics in different storage conditions featuring high efficiency and accuracy.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Non-destructive Storage Time Prediction of Newhall Navel Oranges Based on the Characteristics of Rind Oil Glands

Shu-min

Kang

et al. 2022

Front. Plant Sci.

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“…On the contrary, ethylene production was not significantly correlated with the values of Young's modulus and deformability (Supplementary Figure 6). While blueberry fruit elasticity is a consequence of fruit turgor and cell wall strength (Fava et al, 2006;Rivera et al, 2021), fruit softening is a result of hemicellulosic depolymerization and pectic polysaccharides change (Vicente et al, 2007). Mechanical changes associated with berry softening observed during blueberry ripening and storage differ among species and cultivars and they are likely determined by modification in the content of different cell wall polymers (Vicente et al, 2007;Angeletti et al, 2010;Chen et al, 2015;Liu et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Ethylene Production Affects Blueberry Fruit Texture and Storability

et al. 2022

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Ethylene, produced endogenously by plants and their organs, can induce a wide array of physiological responses even at very low concentrations. Nevertheless, the role of ethylene in regulating blueberry (Vacciniumspp.) ripening and storability is still unclear although an increase in ethylene production has been observed in several studies during blueberry ripening. To overcome this issue, we evaluated the endogenous ethylene production of aVacciniumgermplasm selection at different fruit ripening stages and after cold storage, considering also textural modifications. Ethylene and texture were further assessed also on a bi-parental full-sib population of 124 accessions obtained by the crossing between “Draper” and “Biloxi”, two cultivars characterized by a different chilling requirement and storability performances. Our results were compared with an extensive literature research, carried out to collect all accessible information on published works related to Vaccinium ethylene production and sensitivity. Results of this study illustrate a likely role of ethylene in regulating blueberry shelf life. However, a generalisation valid for allVacciniumspecies is not attainable because of the high variability in ethylene production between genotypes, which is strictly genotype-specific. These differences in ethylene production are related with blueberry fruit storage performances based on textural alterations. Specifically, blueberry accessions characterized by the highest ethylene production had a more severe texture decay during storage. Our results support the possibility of tailoringad hocpreharvest and postharvest strategies to extend blueberry shelf life and quality according with the endogenous ethylene production level of each cultivar.

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“…Similarly, Lv and Wang (2018) measured the influence of blueberry diameter, height from the platform, and loading speed on the fracture force through compression tests. Rivera, Kerckhoffs, Sofkova-Bobcheva, Hutchins, and East (2021) reported that the mechanical properties of blueberries change with the loss of fruit moisture. The relationship between the applied force and volume of pear injury was demonstrated by Razavi, Asghari, Azadbakh, and Shamsabadi (2018).…”

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confidence: 99%

Mechanical properties of mulberry fruit under compression and nuclear magnetic resonance tests

Hou

Zhang

et al. 2021

J Food Process Engineering

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During the mechanized production and processing of mulberry, the fresh fruit can experience serious mechanical damage. In this study, compression tests were conducted to investigate the effect of different parameters on the compression damage to mulberry. The results showed that the extent of compression damage was mainly influenced by the loading displacement rate applied during compression; the damage was increased with increasing loading displacement. At an initial moisture content of 86.76%, the indentation area ratio was increased from 0.0725 to 0.2756 when the loading displacement increased from 3.0 to 6.0 mm. Nuclear magnetic resonance (NMR) spectroscopy was used to observe the changes in the internal moisture content of mulberry before and after compression under different loading rates. When the loading displacement increased from 3.0 to 6.0 mm, the loss of free and bound water in mulberry also increased. Further, with the increase in extrusion, the damage to the mulberry fruit increases significantly. It is proved that the method of image recognition and NMR is feasible to verify the damage to the mulberry fruit. Practical ApplicationsBecause mulberry has a soft texture, it can be easily damaged by extrusion during mechanized production and processing. In this study, a relationship between various factors of compression process and mulberry extrusion damage was established using compression test results. This can be used as a reference for reducing mulberry extrusion damage in the process of mechanized production and processing. Because the extent of damage to mulberry is difficult to identify, this study provides a feasible method to identify the crushing damage to mulberry. | INTRODUCTIONThe mulberry tree can adapt to various complex and harsh environments, and it plays an important role in improving the environment. Furthermore, its by-products are used in various industries such as food, pharmaceuticals, and cosmetics, and is known as the most suitable "factory" for sustainable development (Rohela, Shukla, Muttanna Kumar, & Chowdhury, 2020). Mulberry fruit, as a by-product of mulberry tree, is a type of berry with rich nutrition and physiological health care functions. This was one of the first batch of dual-purpose agricultural products of the Ministry of health (Xu, Zhang, Chen, &

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Influence of water loss on mechanical properties of stored blueberries

Cited by 29 publications

References 65 publications

Non-destructive Storage Time Prediction of Newhall Navel Oranges Based on the Characteristics of Rind Oil Glands

Non-destructive Storage Time Prediction of Newhall Navel Oranges Based on the Characteristics of Rind Oil Glands

Ethylene Production Affects Blueberry Fruit Texture and Storability

Mechanical properties of mulberry fruit under compression and nuclear magnetic resonance tests

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