Detection of Internal Quality in Seedless Watermelon by Acoustic Impulse Response

Diezma, Belén; Ruiz-Altisent, Margarita; Elorza, Pilar Barreiro

doi:10.1016/j.biosystemseng.2004.03.007

Cited by 84 publications

(40 citation statements)

References 7 publications

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“…We noted a positive effect of oxygation on reducing the internal crack of melon fruits (Figure 3). Although oxygation minimized the internal fruit crack, the cause of watermelon fruit internal crack is not yet known (Diezema Iglesias et al, 2004). Agronomic, physiological and genetic approaches towards mitigating this problem will help the melon industry significantly as the fruits with internal crack are unmarketable and causes significant economic loss to growers.…”

Section: Discussionmentioning

confidence: 99%

Oxygation Improves Yield and Quality and Minimizes Internal Fruit Crack of Cucurbits on a Heavy Clay Soil in the Semi-arid Tropics

Bhattarai

Dhungel

Midmore

2010

JAS

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Lack of oxygen due to sustained wetting fronts associated with drip and subsurface drip irrigated crops in heavy clay soil can negatively impacts on yield, fruit quality and water use efficiency of cucurbit crops. This study evaluated the effects of aerated irrigation water (oxygation) with subsurface drip irrigation, employing an in-line air injector (Mazzei venturi to introduce 12% air by volume of water) on fruit yield, quality and water use efficiency of watermelon (Citrullus vulgaris) and pumpkin (Cucurbita maxima) in a heavy clay soil. The fruit yield with oxygation increased from 14.5 t ha -1 to 24.6 t ha -1 , and 26.3 t ha -1 to 28.9 t ha -1 , for watermelon and pumpkin, respectively. The total soluble solids (TSS) increased by 19% with oxygation (13.2 vs. 11.1%), and internal fruit crack decreased for watermelon, whereas in pumpkin fruit dry matter increased by 4% (40 vs. 38.4%) and TSS by 7% (13.7 vs. 12.8%). Season long water use efficiency was greater with oxygation compared to the control in both crops. The higher yield with oxygation was associated with a more rapid canopy cover, more leaf chlorophyll, and an increase in leaf photosynthetic rate, and leaf transpiration and an increase in fruit number and size. The results suggested that oxygation can ameliorate temporal hypoxia-associated with drip irrigated cucurbit crops in heavy clay soil and also offer yield and fruit quality benefits.

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Section: Discussionmentioning

confidence: 99%

Oxygation Improves Yield and Quality and Minimizes Internal Fruit Crack of Cucurbits on a Heavy Clay Soil in the Semi-arid Tropics

Bhattarai

Dhungel

Midmore

2010

JAS

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“…Taniwaki et al determined also the optimum harvest time in case of melon (2009c) and in case of pear (2009b) using a Laser Doppler vibrometer. The internal quality defect in watermelon can be detected with help of acoustic method (Diezma-Iglesias et al, 2004). Elbatawi (2008) successfully carried out measurements in order to detect internal quality defect (hollow heart) of potato tubers by the help of acoustic impact method.…”

Section: Introductionmentioning

confidence: 99%

Quality changes of pear during shelf-life

Zsom¹,

Zsom-Muha

Dénes

et al. 2016

Progress in Agricultural Engineering Sciences

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Abstract. The aims of our research work were the investigation of postharvest changes of pear samples (Pyrus communis cv. Bosc kobak) during combined cold storage and shelf-life (storage at room temperature), the determination of quality changes by mainly non-destructive methods, the modeling of the changes of the non-destructive parameters (acoustic, impact stiffness coefficient, chlorophyll fluorescence parameters [Fv/Fm, Fm/F0]), and multivariate statistical analysis of the measured and predicted data based on the data of the non-destructive texture analysis (acoustic and impact methods), chlorophyll fluorescence analysis and laser scattering measurement. Storage Time Equivalent Value (STEV) was calculated and introduced based on mass-loss analysis. The changes of the non-destructive parameters were analyzed vs. this virtual storage time (STEV). The changes of acoustic, impact stiffness coefficient and chlorophyll fluorescence parameters can be predicted by exponential function. The predicted time constants of the parameters were 21.0, 45.8, 47.1, 83.4, acoustic, impact stiffness coefficient, Fm/F0, Fv/Fm, respectively. The lower the time constant, the quicker is the change of the given parameter during storage, the higher is its sensitivity. By this point of view, the percentage mass loss related sensitivity to the characterization of textural changes, the predicted acoustic stiffness coefficient was found to be more sensitive than the impact stiffness coefficient. The Fm/F0 value characterized more sensibly the changes of the chlorophyll fluorescence than in the literature commonly used Fv/Fm. The non-contact laser scattering method based significant PLS models were constructed to predict the quality related pear characteristics (mechanical properties, chlorophyll fluorescence parameters).

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“…Non-destructive measurements may be carried out by examining optical properties (Lu and Peng, 2006;Ziosi et al, 2008), firmness estimated by impact (De Ketelaere et al, 2006;Diezma-Iglesias et al, 2004;Valero et al, 2007;Zude et al, 2006) or acoustic response (De Belie et al, 2000;Gómez et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Comparison of multispectral indexes extracted from hyperspectral images for the assessment of fruit ripening

Lleó

Roger²,

Herrero-Langreo

et al. 2011

Journal of Food Engineering

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Keywords:Hyperspectral imaging Vision Ripeness Non-destructive assessment Quality PeachThe present research is focused on the application of artificial visión to assess the ripening of red skinned soft-flesh peach ('Richlady'). Artificial visión allows a spatially detailed determination of the ripening stage of the fruit. The considered optical indexes (Indi and Ind2, proposed in the present research, and Ind 3 and I AD , proposed by other authors) are based on the combination of wavelengths cióse to the chlorophyll absorption peak at 680 nm. Ind} corresponds approximately to the depth of the absorption peak, and Ind 2 corresponds to the relative absorption peak. An artificial image of each Índex was obtained by computing the corresponding reflectance images, which were acquired with a hyperspectral camera. All indexes were able to correct convexity (except for the just-harvested peaches and for Ind}). Ind 2 is the preferred Índex; it showed the highest discriminating power between ripening stages and no influence of convexity. Ind 2 also allowed the differentiation of ripening regions within the fruits, and it showed the evolution of those regions during ripening.

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Detection of Internal Quality in Seedless Watermelon by Acoustic Impulse Response

Cited by 84 publications

References 7 publications

Oxygation Improves Yield and Quality and Minimizes Internal Fruit Crack of Cucurbits on a Heavy Clay Soil in the Semi-arid Tropics

Oxygation Improves Yield and Quality and Minimizes Internal Fruit Crack of Cucurbits on a Heavy Clay Soil in the Semi-arid Tropics

Quality changes of pear during shelf-life

Comparison of multispectral indexes extracted from hyperspectral images for the assessment of fruit ripening

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