Effect of an Edible Coating Based on Chitosan and Oxidized Starch on Shelf Life of Carica papaya L., and Its Physicochemical and Antimicrobial Properties

Escamilla‐García, Monserrat; Rodríguez-Hernández, María Jesús; Hernández-Hernández, H.M.; Delgado-Sánchez, Luis Felipe; García-Almendárez, Blanca E.; Amaro-Reyes, Aldo; Regalado‐González, Carlos

doi:10.3390/coatings8090318

Cited by 43 publications

(20 citation statements)

References 44 publications

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“…TA content is regarded as an important indicator of respiration rate of fruits as organic acids are substrates for the respiratory metabolim [49]. As shown in Figure 1g, the TA content of coated and uncoated papayas decreased as the storage period was extended, as previously reported by others [49].…”

Section: Titratable Aciditysupporting

confidence: 76%

Application of Pullulan and Chitosan Multilayer Coatings in Fresh Papayas

2019

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In this work, some multilayer coatings (two-layer, four-layer or six-layer) based on pullulan and chitosan for protecting papayas were prepared by the layer-by-layer technique. The papayas were coated by immersion and stored at 25 °C, 50% relative humidity or up to 14 days. Uncoated and monolayer-coated papayas were used as controls. The pullulan/chitosan coatings decreased the papaya weight loss, softening, color change (b*, ΔE), and pH, retarded the fall of titratable acidity and vitamin C, and maintained respiratory rate and soluble solid contents. Sensory quality evaluation demonstrated that pullulan/chitosan coatings effectively preserved papaya flavor and overall acceptance. In general, the four-layer coatings provided the best fruit preservation. In conclusion, multilayer pullulan/chitosan coatings are efficient in maintaining the post-harvest quality and prolonging the shelf life of fresh papaya.

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Section: Titratable Aciditysupporting

confidence: 76%

Application of Pullulan and Chitosan Multilayer Coatings in Fresh Papayas

2019

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“…The cationic nature of the polymer allows it to bind to different chemicals species, ranging from organic macromolecules to metal nanoparticles [12][13][14]. Natural oils or extracts of natural products can be incorporated into the chitosan matrix, for example, by cross-linking, producing solutions, films or beads [15][16][17]. In the particular case of propolis, its polyphenols have been reported to form hydrogen bonds and covalent bonds with the functional groups in chitosan [18].…”

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confidence: 99%

Chitosan-Based Coatings to Prevent the Decay of Populus spp. Wood Caused by Trametes Versicolor

et al. 2018

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Chitosan and chitosan oligomers are receiving increasing attention due to their antimicrobial properties. In the present study, they were assayed as a preventive treatment against white-rot decay of Populus wood (very important in economic and environmental terms), caused by Trametes versicolor fungus. Their capacity to incorporate different chemical species into the polymer structure with a view to improving their anti-fungal activity was also assessed by mixing oligo-chitosan with propolis and silver nanoparticles. The minimum inhibitory concentration of medium-molecular weight chitosan (MMWC), chitosan oligomers (CO), propolis (P), nanosilver (nAg), and their binary and ternary composites against T. versicolor was determined in vitro. Although all products exhibited anti-fungal properties, composites showed an enhanced effect as compared to the individual products: 100% mycelial growth inhibition was attained for concentrations of 2.0 and 0.2 mg·mL −1 for the CO-P binary mixture, respectively; and 2 µg·mL −1 for nAg in the ternary mixture. Subsequently, MMWC, CO, CO-P and CO-P-nAg composites were tested on poplar wood blocks as surface protectors. Wood decay caused by the fungus was monitored by microscopy and vibrational spectroscopy, evidencing the limitations of the CO-based coatings in comparison with MMWC, which has a higher viscosity and better adhesion properties. The usage of MMWC holds promise for poplar wood protection, with potential industrial applications. Coatings 2018, 8, 415 2 of 15its main characteristics, such as its bioactivity, non-toxicity or biodegradability, its antimicrobial effect is especially relevant [4][5][6]. Its activity against different fungi, gram positive and gram negative bacteria, is ascribed to the positive charge of amino group (NH 3 + ), which interacts electrostatically with the surface of the cellular membrane, destabilizing it. As a consequence, the presence of chitosan inside the cell can lead to intracellular responses such as inactivation or blocking of enzymes activities, and of DNA transcription and translation [7,8].The antifungal activity of chitosan not only depends on the fungus species, but also on its molecular weight (MW), polymerization degree (PD) or deacetylation degree (DD). For instance, chito-oligosaccharides with low MW, PD and DD have been reported to be more effective on phytopathogenic fungi than chitosan with higher MW, PD or DD [9][10][11].Another known advantage from chitosan and its oligomers is associated with their sorption and chelating properties. The cationic nature of the polymer allows it to bind to different chemicals species, ranging from organic macromolecules to metal nanoparticles [12][13][14]. Natural oils or extracts of natural products can be incorporated into the chitosan matrix, for example, by cross-linking, producing solutions, films or beads [15][16][17]. In the particular case of propolis, its polyphenols have been reported to form hydrogen bonds and covalent bonds with the functional groups in chitosan [18]. This results...

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“…Hazarika, Lalthanpuii and Mandal (2017) also reported reduced firmness of coated papaya fruits with increased shelf life. Escamilla-García et al (2018) reported that uncoated papaya fruits had a firmness loss of 92% during storage, while those coated with chitosan and oxidized starch had a firmness reduction of only 47%. The valor similar values to the present work, where at the end of 8 days the fruits presented 43% less firmness.…”

Section: Resultsmentioning

confidence: 99%

Post-harvest quality of papaya coated with polivinilic alcohol and maize starch

et al. 2021

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Climacteric fruits have short postharvest shelf life. Coating is an alternative to minimize fruit ripening and post-harvest losses. Maize starch (S) and polivinilic alcohol - PVOH (P), isolated or blended, can be used in the formulation of coatings. However, little is known about the potential of PVOH-containing coatings in postharvest conservation of fruits. Papaya were aftercoated with 5 coating formulations: 3% starch (S), 3% PVOH (P), 2.25% S + 0.75% P, 1.5% S + 1.5% P and 0.75% S + 2.25% P. The fruits were kept at room temperature (20 ± 5 °C and 70 ± 10% RH) and physicochemical characteristics were evaluated for up to eight days. Uncoated fruits were used as control. In general, maize starch and PVOH. In general, maize starch and PVOH coatings reduced the weight loss and did not affect total soluble solids concentration. 3% PVOH coating increased the acidity and decreased the pH of the fruits, and excessively inhibited gas exchange between fruit and the environment. In this study, 3% maize starch coating was more efficient in prolonging the postharvest life of papaya.

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Effect of an Edible Coating Based on Chitosan and Oxidized Starch on Shelf Life of Carica papaya L., and Its Physicochemical and Antimicrobial Properties

Cited by 43 publications

References 44 publications

Application of Pullulan and Chitosan Multilayer Coatings in Fresh Papayas

Application of Pullulan and Chitosan Multilayer Coatings in Fresh Papayas

Chitosan-Based Coatings to Prevent the Decay of Populus spp. Wood Caused by Trametes Versicolor

Post-harvest quality of papaya coated with polivinilic alcohol and maize starch

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