IDEAS home Printed from https://ideas.repec.org/a/caa/jnlcjf/v26y2008ispecialissueid248-2008-cjfs.html
   My bibliography  Save this article

Antioxidant activity of wines and related matters studied by EPR spectroscopy

Author

Listed:
  • Pavel STOPKA

    (Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-Řež, Czech Republic)

  • Jana KŘÍŽOVÁ

    (Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Husinec-Řež, Czech Republic)

  • Naděžda VRCHOTOVÁ

    (Department of Viticulture and Oenology)

  • Petra BÁBÍKOVÁ
  • Jan TŘÍSKA

    (Department of Viticulture and Oenology)

  • Josef BALÍK

    (Department of Post-harvest Technology of Horticultural Products, Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice, Czech Republic)

  • Marie KYSELÁKOVÁ

Abstract

Antioxidant activity and free radicals were studied in various parts of Vitis vinifera plant in vivo and in wines using EPR spectroscopy. Antioxidative properties of polyphenolic substances play an important role for the evaluation of quality of natural products. Determination of antioxidant activity of experimental samples by EPR method was based on measuring the changes of EPR spectrum of stable nitroxide radicals as a result of their interaction with antioxidants. In the leaves of Vitis vinifera vine varieties for the production of red wines there was observed a higher decrease in free Tempol radicals as compared to the leaves of varieties used for the production of white wines. For all monitored wines there was established a clear decrease in free Tempol radicals to the average value of 75.5 ± 15.6% as compared to the original EPR spectrum. A higher antioxidant activity was observed in yeast sediments from the production of red wines than in those from white ones.

Suggested Citation

  • Pavel STOPKA & Jana KŘÍŽOVÁ & Naděžda VRCHOTOVÁ & Petra BÁBÍKOVÁ & Jan TŘÍSKA & Josef BALÍK & Marie KYSELÁKOVÁ, 2008. "Antioxidant activity of wines and related matters studied by EPR spectroscopy," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 26(SpecialIs), pages 49-54.
    • Handle: RePEc:caa:jnlcjf:v:26:y:2008:i:specialissue:id:248-2008-cjfs
    DOI: 10.17221/248/2008-CJFS
    as

    Download full text from publisher

    File URL: http://cjfs.agriculturejournals.cz/doi/10.17221/248/2008-CJFS.html
    Download Restriction: free of charge
    File URL: http://cjfs.agriculturejournals.cz/doi/10.17221/248/2008-CJFS.pdf
    Download Restriction: free of charge
    File URL: https://libkey.io/10.17221/248/2008-CJFS?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:caa:jnlcjf:v:26:y:2008:i:specialissue:id:248-2008-cjfs. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Ivo Andrle (email available below). General contact details of provider: https://www.cazv.cz/en/home/ .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.