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Article

Effect of PLA Active Packaging Containing Monoterpene-Cyclodextrin Complexes on Berries Preservation

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Department of Health Sciences, Campus de los Jerónimos, Universidad Católica San Antonio de Murcia, No.135 Guadalupe, 30107 Murcia, Spain
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Escuela de Administración de Instituciones (ESDAI), Universidad Panamericana, Álvaro del Portillo 49, Ciudad Granja, Zapopan 45010, Mexico
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Departamento de Tecnología Alimentaria, Centro de Investigación y Asistencia Tecnológica y Diseño del Estado de Jalisco (CIATEJ), Marcelino García Barragán 800, Guadalajara 44270, Mexico
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Department of Food Technology, University Miguel Hernández, Orihuela, 03312 Alicante, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Cédric Delattre
Polymers 2021, 13(9), 1399; https://doi.org/10.3390/polym13091399
Received: 8 April 2021 / Revised: 20 April 2021 / Accepted: 21 April 2021 / Published: 26 April 2021
(This article belongs to the Special Issue Polymers in Agriculture and Food Science)
Blackberries and raspberries are highly perishable and fragile products, which limits their shelf life. The effect of biodegradable active packaging of blackberries and raspberries containing 2.5% and 5.0% weight (wt%) of thymol or carvacrol complexed in β-cyclodextrins (β-CDs), successively added to poly (lactic acid) (PLA), and melt-processed by injection molding was evaluated under stored conditions at 4 °C for 21 days, using as reference commercial clamshell and PLA package control samples. Thus, physicochemical, headspace, microbiological, and sensory quality studies were carried out in order to compare the efficacy of the different packages. Concerning weight loss, color, and total phenolic and soluble solids content, significant differences were detected when compared with commercial clamshell packaging. The results show that the PLA packages containing thymol and carvacrol complexes maintained the color, weight, and phenolic content of berries until day 21, with a score up to 45% better compared to commercial clamshell. The headspace analysis detected 101 mg L−1 (ppm) of thymol and 35 ppm of carvacrol on the first day of refrigeration; these concentrations decreased with time. This release mechanism of carvacrol and thymol into the PLA package modified the initial atmosphere composition. After 21 days of storage, the berries had 4.25 degrees of acceptance, without adverse perception of aroma or flavor for both carvacrol and thymol compounds. A general microbial inhibition was observed for yeast and molds, which increased with the concentration of monoterpene in PLA packages, and showed an inhibition of 3.5 log units for PLA packages containing thymol, and of 3 log units for those containing carvacrol. Overall results show that PLA/β-CD-thymol 5.0% packages prolonged raspberries’ and blackberries’ shelf life by one more week at 4 °C, compared with commercial clamshell packaging. View Full-Text
Keywords: active packaging; poly (lactic acid); thymol; carvacrol; β-cyclodextrin; berries; shelf life active packaging; poly (lactic acid); thymol; carvacrol; β-cyclodextrin; berries; shelf life
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MDPI and ACS Style

Velázquez-Contreras, F.; García-Caldera, N.; Padilla de la Rosa, J.D.; Martínez-Romero, D.; Núñez-Delicado, E.; Gabaldón, J.A. Effect of PLA Active Packaging Containing Monoterpene-Cyclodextrin Complexes on Berries Preservation. Polymers 2021, 13, 1399. https://doi.org/10.3390/polym13091399

AMA Style

Velázquez-Contreras F, García-Caldera N, Padilla de la Rosa JD, Martínez-Romero D, Núñez-Delicado E, Gabaldón JA. Effect of PLA Active Packaging Containing Monoterpene-Cyclodextrin Complexes on Berries Preservation. Polymers. 2021; 13(9):1399. https://doi.org/10.3390/polym13091399

Chicago/Turabian Style

Velázquez-Contreras, Friné, Nelsy García-Caldera, José D. Padilla de la Rosa, Domingo Martínez-Romero, Estrella Núñez-Delicado, and José A. Gabaldón 2021. "Effect of PLA Active Packaging Containing Monoterpene-Cyclodextrin Complexes on Berries Preservation" Polymers 13, no. 9: 1399. https://doi.org/10.3390/polym13091399

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