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Article

Improvement of Andean Blueberries Postharvest Preservation Using Carvacrol/Alginate-Edible Coatings

1
Facultad Seccional Duitama, Escuela de Administración de Empresas Agropecuarias, Universidad Pedagógica y Tecnológica de Colombia, Carrera 18 con Calle 22, Duitama 150461, Boyacá, Colombia
2
Laboratorio de Polímeros y Materiales Compuestos (LP&MC), Departamento de Física, Instituto de Física de Buenos Aires (IFIBA-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428, Argentina
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(10), 2352; https://doi.org/10.3390/polym12102352
Received: 20 September 2020 / Revised: 10 October 2020 / Accepted: 12 October 2020 / Published: 14 October 2020
(This article belongs to the Special Issue Biodegradable Polymers II)
Edible coatings are attractive strategies for blueberries postharvest preservation. In this work, carvacrol/alginate coatings were developed for application on Andean blueberries. Coating formulations were prepared based on blends of sodium alginate (2% w/v), carvacrol (0%, 0.03%, 0.06% or 0.09%), glycerol, and water and applied to the fruits by dip-coating. Then, the fruits were immersed in a calcium batch to induce a crosslink reaction. Changes in the physicochemical and microbiological characteristics of the blueberries were monitored during 21 days of storage at 4 °C. Coated blueberries were better preserved throughout the 21 days of storage because of their lower respiration rate and water loss, in comparison with the uncoated ones. Besides, the coatings enhanced the appearance and the gloss of the fruits. Control fruits showed a significant decrease in the firmness, while, in the coated fruits, this critical postharvest quality was preserved during the entire storage. Coating formulations with 0.09% of carvacrol was the most effective in preventing mesophilic aerobic bacteria and molds/yeasts growth on the fruits during the storage. Edible carvacrol/alginate coatings can be considered as a useful alternative to complement the benefits of refrigerated storage by delaying post-harvest spoilage of Andean blueberries. View Full-Text
Keywords: biopolymers; food preservation; agro-industry; berries; edible films biopolymers; food preservation; agro-industry; berries; edible films
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MDPI and ACS Style

Medina-Jaramillo, C.; Quintero-Pimiento, C.; Díaz-Díaz, D.; Goyanes, S.; López-Córdoba, A. Improvement of Andean Blueberries Postharvest Preservation Using Carvacrol/Alginate-Edible Coatings. Polymers 2020, 12, 2352. https://doi.org/10.3390/polym12102352

AMA Style

Medina-Jaramillo C, Quintero-Pimiento C, Díaz-Díaz D, Goyanes S, López-Córdoba A. Improvement of Andean Blueberries Postharvest Preservation Using Carvacrol/Alginate-Edible Coatings. Polymers. 2020; 12(10):2352. https://doi.org/10.3390/polym12102352

Chicago/Turabian Style

Medina-Jaramillo, Carolina, Carmen Quintero-Pimiento, Darío Díaz-Díaz, Silvia Goyanes, and Alex López-Córdoba. 2020. "Improvement of Andean Blueberries Postharvest Preservation Using Carvacrol/Alginate-Edible Coatings" Polymers 12, no. 10: 2352. https://doi.org/10.3390/polym12102352

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