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Open AccessArticle

The Influence of Film and Storage on the Phenolic and Antioxidant Properties of Red Raspberries (Rubus idaeus L.) cv. Erika

1
Dipartimento AGRARIA—Università degli Studi “Mediterranea” di Reggio Calabria, Contrada Melissari, 89124 Reggio Calabria, Italy
2
Dipartimento di Chimica e Biologia, Università degli Studi di Salerno, via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy
*
Author to whom correspondence should be addressed.
Antioxidants 2019, 8(8), 254; https://doi.org/10.3390/antiox8080254
Received: 28 June 2019 / Revised: 18 July 2019 / Accepted: 26 July 2019 / Published: 30 July 2019
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Abstract

In this paper, the effect of the packaging material and storage method on red raspberries produced at Reggio Calabria (Italy) was studied. For this purpose, the fruits were stored immediately after harvest in different conditions: in the fridge at 1 °C and in the freezer at −20 °C, using different packaging materials, two new patented films (nanoactive A) and (nanoactive B), one common packaging film (polyethylene terephthalate), and other fruits were left without any packaging material. Chemical parameters were analysed at harvest to have the initial characteristics without any conditioned storage and to distinguish the post-harvest effect on the fruits, then daily for storage in the fridge and monthly for storage in the freezer. The aims of our project were first to determine the qualitative characterization of these red raspberries, the optimization of their shelf-life during time in the fridge or freezer, using the different types of packaging materials and finally to highlight the usefulness of the new patented packaging materials. Nanoactive A film showed the best shelf-life in the fridge, and after 14 days the values, given as mg/100 g fresh weight, were: total phenolics (166.70), monomeric anthocyanin content (50.82), flavonoids (24.64), ascorbic acid (32.42), and 1, 1-diphenyl-2-picrylhydrazyl (DPPH) assay (95.93). View Full-Text
Keywords: nanoactive film; PET; packaging; post-harvest; shelf-life; raspberry; rubus; small fruit nanoactive film; PET; packaging; post-harvest; shelf-life; raspberry; rubus; small fruit
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Giuffrè, A.M.; Louadj, L.; Rizzo, P.; De Salvo, E.; Sicari, V. The Influence of Film and Storage on the Phenolic and Antioxidant Properties of Red Raspberries (Rubus idaeus L.) cv. Erika. Antioxidants 2019, 8, 254.

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