scholarly journals Modeling Post-harvest Quality by StanSAT, Applied to Cucumis Sativus L.

2021 ◽  
Author(s):  
Chen Cheng ◽  
Xinxing Xu ◽  
Chaoyang Dong ◽  
Zhihong Gong ◽  
J. Fernando Bienvenido Barcena
Keyword(s):  
Simulation Model ◽  
Quality Index ◽  
Quality Evaluation ◽  
Shape Index ◽  
Solid Content ◽  
Internal Quality ◽  
Soluble Solid Content ◽  
Post Harvest ◽  
Soluble Solid ◽  
Color Value

Abstract Crop post-harvest quality model is designed to dynamically and accurately simulate the quality change process. In this study, the relationship between morphological indices and fruit quality (external quality and internal quality) were quantitatively simulated, and the post-harvest quality and quality evaluation value simulation model were established for the first time with standardized stress accumulated temperature (\({\text{S}\text{t}\text{a}\text{n}}_{\text{S}\text{A}\text{T}}\)). The results showed: 1) There were significant linear relationships between the fresh weight and the volume, the darker value and the color value, the tan H and the color value, and the water content and the soluble solid content. There was a significant quadratic relationship between fruit density and fruit shape index. There was a significant logarithmic relationship between the tan H and the darker value. 2) The quality indices, including quality evaluation value, darkness value, color value, darker value, shape index, tan H and density, showed a linear change trend with \({\text{S}\text{t}\text{a}\text{n}}_{\text{S}\text{A}\text{T}}\). The soluble solid content showed a quadratic function variation trend with \({\text{S}\text{t}\text{a}\text{n}}_{\text{S}\text{A}\text{T}}\). 3) For each quality index, normalized root mean square error (NRMSE) of each quality index and its evaluation simulation model based on \({\text{S}\text{t}\text{a}\text{n}}_{\text{S}\text{A}\text{T}}\) were from 1.58 % to 17.85 %, which showed the post-harvest quality index and quality evaluation simulation have high accuracy. Generally, the model could systematically and quantitatively express the dynamic process of post-harvest quality of cucumber.

scholarly journals Optical Absorption and Scattering Properties at 900–1650 nm and Their Relationships with Soluble Solid Content and Soluble Sugars in Apple Flesh during Storage

Foods ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1881
Author(s):  
Li Fang ◽  
Kangli Wei ◽  
Li Feng ◽  
Kang Tu ◽  
Jing Peng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Soluble Sugars ◽  
Solid Content ◽  
Partial Least Square ◽  
Least Square ◽  
Coefficient Of Determination ◽  
Internal Quality ◽  
Integrating Sphere ◽  
Soluble Solid Content ◽  
Soluble Solid

Soluble solid content (SSC) is regarded as the most significant internal quality associated with the taste and maturity in fruits. Evaluating the relationship between the optical properties and soluble sugars facilitates exploration of the mechanism of optical techniques in SSC assessment. In this research, absorption coefficient (μa) and reduced scattering coefficient (μ′s) of Fuji apple during storage were obtained using automatic integrating sphere (AIS) at 905–1650 nm. Relationships between μa, μ′s and SSC, and soluble sugars contents, were investigated. The result showed that SSC, the content of total soluble sugars (TSS), fructose, glucose and sucrose were all decreasing after storage, and the same trend appeared in the change of μa and μ′s. In the whole wavelength range, both μa and μ′s were positively related to SSC and soluble sugars contents. The correlations between μa and SSC, and soluble sugars contents, showed increasing tendencies with increasing wavelengths, while for μ′s, correlations had the opposite trend. The strongest correlations between μa and SSC, and soluble sugars contents, were observed in the correlation of μa with sucrose, with an r of 0.934. Furthermore, a partial least square (PLS) model for sucrose based on μa was built with the coefficient of determination of prediction (Rp2) and the root mean square error of prediction (RMSEP) of 0.851 and 1.047, respectively. The overall results demonstrate that optical properties at the range of 905–1650 nm could be used to evaluate SSC of apples and this may due to the strong correlation between sucrose content and μa.

Influence of postharvest hot-dip fungicide treatments on Redblush grapefruit quality during long-term storage/Efecto de los tratamientos fungicidas postcosecha por inmersión en agua caliente sobre la calidad del pomelo Redblush durante el almacenamiento en frío

1995 ◽  
Vol 1 (1) ◽  
pp. 35-40 ◽  
Author(s):  
M. Schirra ◽  
M. Mulas ◽  
L. Baghino
Keyword(s):  
Shelf Life ◽  
Fungal Infections ◽  
Chilling Injury ◽  
Solid Content ◽  
Internal Quality ◽  
Soluble Solid Content ◽  
Long Term Storage ◽  
Soluble Solid ◽  
Endogenous Ethylene ◽  
Ripening Index

The efficacy of postharvest hot-dip treatment on Redblush grapefruit was investigated by 3-min dips in water at 50°C and 20°C, with and without 1500 ppm imazalil (IMZ) or thiabendazole (TBZ). Fruits were stored for 16 weeks in cold rooms at 8°C and then held at 20°C for 1 week to simulate shelf life. IMZ and TBZ treatment at 20°C considerably reduced the incidence of chilling injury (by about 50-60%) and the percentage (by 20%) of fungal infections. The effectiveness of the two fungicides was found to be considerably increased at 50°C. However, the beneficial effect of hot-dip treatment was noted, whether or not associated with the use of fungicides. The chilling index was threefold lower in fruit dipped in water at 50°C. Similar results were obtained by IMZ treatment and mold decay was decreased by about 50%. IMZ treatment at 50°C proved to be phytotoxic, thus resulting in reddish peel pitting, starting on the fourth week of storage. No further detrimental heat-related effect was detected in the remaining cases. Fruit treated with the two fungicides exhibited no significant differences in respiration rate under cold storage, when compared to control. By contrast, by the end of shelf life, sharply increased values were found in fruit treated with IMZ at 20°C. Endogenous ethylene production and internal quality attributes (juice%, total soluble solid content, juice acidity, and ripening index) did not reveal important differences between treatments. Ethanol concentration in the juice was remarkably lower in fruit treated with the two fungicides, whereas differences due to dip temperature were negligible in most cases.

scholarly journals Estimation Method of Soluble Solid Content in Peach Based on Deep Features of Hyperspectral Imagery

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5021
Author(s):  
Baohua Yang ◽  
Yuan Gao ◽  
Qian Yan ◽  
Lin Qi ◽  
Yue Zhu ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Hyperspectral Image ◽  
Hyperspectral Imagery ◽  
Solid Content ◽  
Internal Quality ◽  
Accurate Estimation ◽  
Soluble Solid Content ◽  
Model Based ◽  
Soluble Solid ◽  
Non Destructive

Soluble solids content (SSC) is one of the important components for evaluating fruit quality. The rapid development of hyperspectral imagery provides an efficient method for non-destructive detection of SSC. Previous studies have shown that the internal quality evaluation of fruits based on spectral information features achieves better results. However, the lack of comprehensive features limits the accurate estimation of fruit quality. Therefore, the deep learning theory is applied to the estimation of the soluble solid content of peaches, a method for estimating the SSC of fresh peaches based on the deep features of the hyperspectral image fusion information is proposed, and the estimation models of different neural network structures are designed based on the stack autoencoder–random forest (SAE-RF). The results show that the accuracy of the model based on the deep features of the fusion information of hyperspectral imagery is higher than that of the model based on spectral features or image features alone. In addition, the SAE-RF model based on the 1237-650-310-130 network structure has the best prediction effect (R2 = 0.9184, RMSE = 0.6693). Our research shows that the proposed method can improve the estimation accuracy of the soluble solid content of fresh peaches, which provides a theoretical basis for the non-destructive detection of other components of fresh peaches.

Role of Phospholipase D Inhibitor in Regulating Expression of Senescencerelated Phospholipase D gene in Postharvest Longan Fruit

2019 ◽  
Vol 14 (7) ◽  
pp. 649-657 ◽  
Author(s):  
Li Li ◽  
Jiemin Li ◽  
Jian Sun ◽  
Ping Yi ◽  
Changbao Li ◽  
...  
Keyword(s):  
Phospholipase D ◽  
Ascorbic Acid Content ◽  
Titratable Acidity ◽  
Significant Inhibition ◽  
Solid Content ◽  
Total Soluble Solid ◽  
Total Phenolic ◽  
Soluble Solid Content ◽  
Soluble Solid ◽  
Pericarp Browning

Background: Phospholipase D (PLD)is closely related to browning and senescence of postharvest longan fruit. Objective: This study investigated the effects of 2-butanol (a PLD inhibitor) on the expression and regulation of PLD during storage of longan fruit at a low temperature. Methods: Senescence-related quality indices showed that the 2-butanol-treated fruit presented lower pericarp browning index, pulp breakdown index and total soluble solid value than the untreated fruit. Results: The fruit treated by 60 µL/L 2-butanol exhibited the strongest inhibition on senescence, which significantly delayed changes in weight, titratable acidity content, total soluble solid content and ascorbic acid content. This treatment maintained a high level of total phenolic content and caused significant inhibition on pericarp browning and pulp breakdown. Through ELISA method, 60 µL/L 2-butanol treatment also reduced PLD activity. Real-time RT-PCR (RT-qPCR) results showed that PLD mRNA expression level was inhibited by 60 µL/L 2-butanol within 15 days. Western-blotting results further confirmed the differential expression of PLD during storage, and a relatively higher expression for PLD protein was found in control compared to the 2-butanoltreated fruit during 15-d storage. Conclusion: These results provided a scientific basis and reference to further investigating postharvest longan quality maintenance by regulating the PLD gene expression.

scholarly journals Effect of Cross-Linked Alginate/Oil Nanoemulsion Coating on Cracking and Quality Parameters of Sweet Cherries

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 449
Author(s):  
Camilo Gutiérrez-Jara ◽  
Cristina Bilbao-Sainz ◽  
Tara McHugh ◽  
Bor-Sen Chiou ◽  
Tina Williams ◽  
...  
Keyword(s):  
Titratable Acidity ◽  
Quality Parameters ◽  
Solid Content ◽  
Postharvest Quality ◽  
Soluble Solid Content ◽  
Nutritional Values ◽  
Quality Properties ◽  
Vapor Transfer ◽  
Sweet Cherries ◽  
Soluble Solid

The cracking of sweet cherries causes significant crop losses. Sweet cherries (cv. Bing) were coated by electro-spraying with an edible nanoemulsion (NE) of alginate and soybean oil with or without a CaCl2 cross-linker to reduce cracking. Coated sweet cherries were stored at 4 °C for 28 d. The barrier and fruit quality properties and nutritional values of the coated cherries were evaluated and compared with those of uncoated sweet cherries. Sweet cherries coated with NE + CaCl2 increased cracking tolerance by 53% and increased firmness. However, coated sweet cherries exhibited a 10% increase in water loss after 28 d due to decreased resistance to water vapor transfer. Coated sweet cherries showed a higher soluble solid content, titratable acidity, antioxidant capacity, and total soluble phenolic content compared with uncoated sweet cherries. Therefore, the use of the NE + CaCl2 coating on sweet cherries can help reduce cracking and maintain their postharvest quality.

scholarly journals The Mater-Bi® biodegradable film for strawberry (Fragaria x ananassa Duch.) mulching: effects on fruit yield and quality

2016 ◽  
Vol 11 (3) ◽  
pp. 203 ◽  
Author(s):  
Luigi Morra ◽  
Maurizio Bilotto ◽  
Domenico Cerrato ◽  
Raffaella Coppola ◽  
Vincenzo Leone ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Titratable Acidity ◽  
Solid Content ◽  
Soluble Solid Content ◽  
Chemical Parameters ◽  
Biodegradable Film ◽  
Yield And Quality ◽  
Physical Chemical ◽  
Soluble Solid

Two trials in different agricultural farms were carried out from October 2014 to June 2015 with the aim to assess the advantages linked to the substitution of the low density polyethylene (LDPE) films for soil mulching with the Mater-Bi<sup>®</sup> biodegradable films in the strawberry cultivation under tunnel in Campania. Lifetime of biodegradable mulch and influence of type of mulch on the yield and the quality of cvs Sabrina and Fortuna were evaluated. Plants were cultivated on mulched, raised beds, high 40 cm from bottom soil. Mater-Bi<sup>®</sup> film was 20 <span>µ</span>m thick while LDPE film was 50 mm thick. The physical-chemical parameters (firmness, pH, total soluble solid content, titratable acidity and skin colour) and some bioactive compounds (total polyphenols, flavonoids, anthocyanins, antioxidant activity) of fruits were determined by three samplings effected in consecutive months (from March to May 2015) of the harvest cycle. Biodegradable film guaranteed an effective mulch along the whole strawberry cycle (9-10 months including the time of drawing up of film). Yields of cv Sabrina on LDPE was 18% higher than those on Mater-Bi<sup>®</sup> while the opposite was detected in cv Fortuna (+10%). The physical-chemical parameters of fruits were not modified by the mulches. The content of the bioactive compounds, instead, resulted, in each time of sampling, significantly higher in fruits picked on Mater-Bi<sup>®</sup> based film.

scholarly journals Evaluation of production conditions of tomato grafted with different tobacco rootstocks and determining nicotine content and quality of fruit

2020 ◽  
Vol 115 (2) ◽  
pp. 297
Author(s):  
Seda TUNÇAY ÇAĞATAY ◽  
Gülşah ÇALIK KOÇ ◽  
Fereshteh REZAEİ ◽  
Özlem DARCANSOY İŞERI ◽  
Feride İffet ŞAHIN ◽  
...  
Keyword(s):  
Fruit Size ◽  
Titratable Acidity ◽  
Solid Content ◽  
Soluble Solid Content ◽  
Quality Factors ◽  
Nicotine Content ◽  
Positive Effects ◽  
Tomato Yield ◽  
Significant Difference ◽  
Soluble Solid

<p>This study aimed to investigate the effects of grafting tomato on different tobacco rootstocks on quality factors and nicotine content. The commercial variety (Solanum lycopersicum ‘H2274’) (BIOTECH) of the tomato was used as the scion plant, and six different tobacco (Nicotiana tabacum L.) rootstocks were used: Taşova, Tekel, Muş, Samsun, Dişbudak, Hasankeyf cultivars. Cleft grafting method was used in all plants. Yield of non-grafted and grafted plants grown in open-field conditions was calculated, and there was a significant increase in yield in grafted tomatoes compared to non-grafted tomatoes. There was significantly increased lycopene and β-carotene levels (mg kg-1), especially in ‘Tekel’, ‘Taşova’, ‘Samsun’, and ‘Hasankeyf’ tobacco grafts. There was a statistically significant difference between grafted and non-grafted plants according to 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical retention capacities and total phenol (TP) values. Evaluation of quality determinants including pH values, titratable acidity values (citric acid %), soluble solid content (SSC)(oBrix) , fruit size ratios, showed that tomatoes grafted with ‘Muş’ tobacco rootstock were of higher quality. There was no significant difference between grafted and non-grafted plants according to nicotine analysis of the tobacco-grafted tomatoes, and due to acceptable ranges of nicotin level on tobacco grafted tomato plants were considered to be suitable for consumption. It could be concluded that grafting practices have significantly positive effects on tomato yield and quality.<br /><br /></p>

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