Development of multi-cultivar models for predicting the soluble solid content and firmness of European pear ( Pyrus communis L.) using portable vis–NIR spectroscopy

Pear fruits are known for their antioxidant and nutritional characteristics. However, they are very susceptible to rapid decay. Edible coating (EC) represents a good strategy to maintain postharvest quality. The effects of two EC in slowing down the senescence processes in fresh-cut ‘Coscia’ pears were investigated: EC1 (A. vera gel, hydroxypropyl-methylcellulose and pomegranate seeds oil (PSO), EC2 (A. vera gel and hydroxypropyl-methylcellulose). Weight loss, firmness and colour decrease more slowly in both EC-treated than in untreated (CTR) slices; soluble solid content increases faster in CTR, indicating a faster ripening process. The specific investigation of undesired microorganisms did not generate any colony in all analysed samples. Sensory analysis confirmed that the tasters preferred the EC2-treated samples, as they were the only ones that did not show undesirable flavours until the last day of storage.

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Adulterated stingless bee honey identification using VIS-NIR spectroscopy technique

Food Research ◽

10.26656/fr.2017.5(s1).035 ◽

2021 ◽

Vol 5 (S1) ◽

pp. 85-93

Author(s):

M.F.J. Azmi ◽

D. Jamaludin ◽

S. Abd. Aziz ◽

Y.A. Yusof ◽

A.M. Mustafah

Keyword(s):

Nir Spectroscopy ◽

Principal Component ◽

Solid Content ◽

Stingless Bee ◽

Soluble Solid Content ◽

Spectroscopy Technique ◽

Accuracy Rate ◽

Linear Discriminant ◽

Different Types ◽

Soluble Solid

The objective of this study was to study the ability of the VIS-NIR spectroscopy to classify the pure and adulterated stingless bee honey across the wavelength range of 450– 969 nm using an optical spectrometer. The physicochemical properties such as soluble solid content (SSC) and moisture content (refractive index, RI) of pure and adulterated honey has also been investigated using a refractometer. The result showed that pure stingless bee honey has the highest transmittance rate, SSC and RI value compared to adulterated honey. There are significant differences (P < 0.0001) in the transmittance rate, SSC and RI of stingless bee honey over five different types of treatments. The results also showed that VIS-NIR data were good in classifying the samples into different treatments with 99.33% accuracy rate. About thirty-four wavelengths were found to be the most significant to discriminate the different treatments by principal component analysis (PCA) and linear discriminant analysis (LDA) techniques.

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

Current Bioinformatics ◽

10.2174/1574893614666190503162645 ◽

2019 ◽

Vol 14 (7) ◽

pp. 649-657 ◽

Cited By ~ 1

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.

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

Foods ◽

10.3390/foods10020449 ◽

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.

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