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Stability of Chokeberry Bioactive Polyphenols during Juice Processing and Stabilization of a Polyphenol-Rich Material from the By-Product

Author

Listed:
  • Esther Mayer-Miebach

    () (Federal Research Centre of Nutrition and Food, Max Rubner-Institut (MRI), Haid-und-Neu-Str. 9, D-76131 Karlsruhe, Germany)

  • Marta Adamiuk

    () (Formerly Federal Research Centre of Nutrition and Food, Max Rubner-Institut (MRI), Haid-und-Neu-Str. 9, 76131 Karlsruhe, Germany)

  • Diana Behsnilian

    () (Federal Research Centre of Nutrition and Food, Max Rubner-Institut (MRI), Haid-und-Neu-Str. 9, D-76131 Karlsruhe, Germany)

Abstract

Chokeberries ( Aronia melanocarpa ) are nowadays believed to exhibit potential cardioprotective and antidiabetic effects principally due to their high content in bioactive phenolic compounds. The stability of the phenolic compounds was studied during different stages of a juice production line and a method for the valorization of pomace was evaluated. Samples were taken from a commercial juice production plant, extracted and analyzed for phenolic constituents and antioxidant potential. Prototypes of functional food ingredients were produced from the pomace by wet milling and micro-milling. Alongside juice processing, the contents of phenolic berry constituents did not vary to a great extent and the overall antioxidant activity increased by about 34%. A high quality juice and a by-product still rich in polyphenols resulted from the process. The phenolic compounds content and the overall antioxidant activity remained stable when milling and micro-milling the pomace. During coarse milling, extractability of total phenolic compounds increased significantly (40% to 50%). Nanosized materials with averaged particle sizes (x 50,0 ) of about 90 nm were obtained by micro-milling. These materials showed significantly enhanced extractability of total phenolic compounds (25%) and total phenolic acid (30%), as well as antioxidant activity (35%), with unchanged contents of total procyanidins and anthocyanins contents.

Suggested Citation

  • Esther Mayer-Miebach & Marta Adamiuk & Diana Behsnilian, 2012. "Stability of Chokeberry Bioactive Polyphenols during Juice Processing and Stabilization of a Polyphenol-Rich Material from the By-Product," Agriculture, MDPI, Open Access Journal, vol. 2(3), pages 1-15, September.
  • Handle: RePEc:gam:jagris:v:2:y:2012:i:3:p:244-258:d:20220
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    References listed on IDEAS

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    1. anonymous, 2000. "The brave new world of agriculture," EconSouth, Federal Reserve Bank of Atlanta, issue Q3, pages 8-13.
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    More about this item

    Keywords

    polyphenols; procyanidins; anthocyanins; juice processing; wet micro-milling;

    JEL classification:

    • Q1 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture
    • Q10 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - General
    • Q11 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Aggregate Supply and Demand Analysis; Prices
    • Q12 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Micro Analysis of Farm Firms, Farm Households, and Farm Input Markets
    • Q13 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Markets and Marketing; Cooperatives; Agribusiness
    • Q14 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Finance
    • Q15 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Land Ownership and Tenure; Land Reform; Land Use; Irrigation; Agriculture and Environment
    • Q16 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - R&D; Agricultural Technology; Biofuels; Agricultural Extension Services
    • Q17 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agriculture in International Trade
    • Q18 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Policy; Food Policy

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