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Challenging chemical and quality changes of supercritical Co 2 dried apple during long-term storage
University of Belgrade, Serbia.
University of Belgrade, Serbia.
University of Padova, Italy.
University of Padova, Italy.
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2019 (English)In: Lebensmittel-Wissenschaft + Technologie, ISSN 0023-6438, E-ISSN 1096-1127, Vol. 110, p. 132-141Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to analyze the stability of sensory properties and secondary metabolites in supercritical-CO 2 (scCO 2 ) dried ‘Elstar’ apple cuts/snacks during twelve months of storage at ‘room’ temperature. Air-drying and freeze-drying were used as reference methods. ScCO 2 -dried apple packed in aluminum-polyethylene bags under nitrogen gas retained a high sensory and nutritional quality, and acceptance level until the end of the observed period. The overall acceptance scores of these apples after 6 and 12 months of storage remained in the range of neutral consumer attitude “neither like nor dislike”. Packaging under nitrogen gas preserved the content of flavonols (≥0.14 g/kg), dihydrochalcones (≥0.10 g/kg), hydroxycinnamic acids (≥0.18 g/kg), triterpenes (≥5.72 g/kg), and proanthocyanidins (≥0.08 g/kg) in dried apple irrespective of the drying method applied. The comparison with the conventional drying processes demonstrated that scCO 2 -drying represents a promising alternative technology for the production of dried apple snacks. The study was assisted by the evaluation of consumer attitudes towards dried fruit and drying technologies. Freeze-drying, air-drying and scCO 2 -drying were recognized by the tested consumers as trustful drying-processes, with expressed interests in buying scCO 2 -dried products if the technology was scientifically proven as excellent in preserving nutrients, color and taste of food products.

Place, publisher, year, edition, pages
Academic Press , 2019. Vol. 110, p. 132-141
Keywords [en]
Consumer survey, Secondary metabolites, Sensory analysis, Shelf life, Supercritical CO 2 drying, Carbon dioxide, Flavonoids, Food storage, Fruits, Low temperature drying, Metabolites, Nitrogen, Solar dryers, Alternative technologies, Hydroxycinnamic acids, Nutritional qualities, Supercritical CO2, Supercritical CO2 (scCO2), Drying
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-38671DOI: 10.1016/j.lwt.2019.04.083Scopus ID: 2-s2.0-85064912806OAI: oai:DiVA.org:ri-38671DiVA, id: diva2:1315037
Note

 Funding details: 635759; Funding text 1: This research has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 635759 : Faster Upcoming Technology Uptake Relevant for the Environment in FOOds Drying (“FUTURE-FOOD”). Sara Spilimbergo received funding from Progetto Strategico di Dipartimento SID 2016 of the Department of Industrial Engineering ( University of Padua ). Appendix A

Available from: 2019-05-10 Created: 2019-05-10 Last updated: 2023-05-16Bibliographically approved

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