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Food and Bioprocess Technology

, Volume 3, Issue 6, pp 867–877 | Cite as

Kinetics of Polyphenol Losses During Soaking and Drying of Cider Apples

  • Emilie Devic
  • Sylvain Guyot
  • Jean-Dominique Daudin
  • Catherine BonazziEmail author
Original Paper

Abstract

A regular consumption of fresh or processed fruits can contribute to preventing cardiovascular diseases and cancer. Polyphenols, which are naturally present in fresh apples (Malus x domestica), are widely acknowledged as antioxidants. Cider apples contain high concentrations of polyphenols, but their composition differs markedly as a function of cultivar. Two of which were studied in this respect. The first cultivar was Marie Menard, which is highly concentrated in polyphenols and has a standard profile showing high levels of hydroxycinnamic acids and monomeric catechins, widely involved in oxidation reactions catalyzed by the polyphenol oxidase; the second one was Guillevic, which has an atypical phenolic profile for a cider apple, with highly polymerized procyanidins and no monomeric catechins, which thus induces a low sensitivity to enzymatic browning. Both cultivars were subjected to osmotic dehydration at two temperatures (45 and 60 °C) or to convective air-drying, and a combination of the two processes was also tested. Phenolic compounds were quantified by high performance liquid chromatography for various processing times and regardless of the quantity of impregnated sugar. The results revealed different behaviors depending on the polyphenolic groups of compounds. Procyanidins were better preserved by the processes than hydroxycinnamic acids or monomeric catechins. Indeed, these latter groups of polyphenols were first of all involved in enzymatic browning but could also diffuse more easily as their molecular weight was lower. Polyphenol retention was also dependent on the process applied. Polyphenols were better retained by convective drying than by osmotic dehydration, and when soaking was applied as a pretreatment, polyphenol losses were limited during subsequent drying. Moreover, the level of sucrose impregnation could mask the astringency of procyanidins.

Keywords

Dehydration Impregnation Diffusion Oxidation Hydroxycinnamic acids Procyanidins 

Notes

Acknowledgments

We would like to thank the IFPC (Institut Français des Productions Cidricoles—French Institute for Cider Production, Sées (61), France) for supplying the cider apples. Thanks are also due to the European Commission for partly funding this study under the ISAFRUIT Integrated Project (FP6-FOOD 016279-2).

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Copyright information

© Springer Science + Business Media, LLC 2010

Authors and Affiliations

  • Emilie Devic
    • 1
    • 2
  • Sylvain Guyot
    • 3
  • Jean-Dominique Daudin
    • 4
  • Catherine Bonazzi
    • 1
    • 2
    Email author
  1. 1.INRA, UMR1145 Ingénierie Procédés AlimentsMassyFrance
  2. 2.AgroParisTech, UMR1145 Ingénierie Procédés AlimentsMassyFrance
  3. 3.INRA, UR117 Recherches Cidricoles et Biotransformation des Fruits et LégumesLe RheuFrance
  4. 4.INRA, UR370 Qualité des Produits AnimauxSt Genes ChampanelleFrance

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