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  • 1 University of Szeged Dept. of Food Sciences, Faculty of Food Industry Hungary
  • 2 Cereal Research Non-Profit Company Szeged Hungary
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The purpose of this study was to examine the reductive antioxidant properties of methanol extracts of wheat grains. Three wheat varieties (GK Garaboly, GK Kalász and GK Petur) grown in the experimental field of the Cereal Research Non-Profit Company in Szeged in the years 2001, 2002 and 2003 were investigated. Two reagents, iron(III) chloride and 2,2′-dipyridyl dissolved in absolute ethanol, were used to characterize the antioxidant effect of the methanol extract of the defatted whole grains. Fe 3+ was transformed into Fe 2+ by the reductive agents of the extract and a red Fe 2+ complex was formed with 2,2′-dipyridyl. Colour intensity was measured spectrophotometrically and the absorbances found were converted to amounts of L-ascorbic acid (L-AS) in mg after calibration. The “reducing capacity” (RC), was introduced, i.e. the quantity of L-AS (mg) in 1000 g defatted wheat grains determined by this method. The examinations revealed that different quantities of given fertilizers did not influence the RC values for a particular variety. The fungicide-treated and control samples did not display characteristic differences in RC value for the same variety. The different varieties exhibited different characteristic RC values. The RC values proved to be dependent on the crop year. The determination of RC values is a relatively rapid method and these values can be used as important biological characteristics of different wheat grains.

  • Gábor, E.-Tanács, L. (2002): Antioxidant Activity of Some Phenol Compounds of Durum Wheat Grains. ICC Conference, Budapest, May 26–29. CD-ROM.

  • Gábor, E.-Tanács, L.-Kormos, M. (2003): A búza egyes biológiailag aktív vegyületeinek táplálkozás-élettani jelentősége. (Nutritional Importance of Some Biological Active Compounds of Wheat), Molnárok Lapja 108 , 5.sz. 9.

    Kormos M. , 'A búza egyes biológiailag aktív vegyületeinek táplálkozás-élettani jelentősége ' (2003 ) 108 Molnárok Lapja : 9 -.

    • Search Google Scholar
  • Graf, E. (1992): Antioxidant Potential of Ferulic Acid. Free Rad. Biol. Medicine. 13 ,435.

    Graf E. , 'Antioxidant Potential of Ferulic Acid ' (1992 ) 13 Free Rad. Biol. Medicine. : 435 -.

    • Search Google Scholar
  • Miller, H.E., Rigelhof, F., Marquart, L., Prakash, A. and Kanter, M. (2000): Whole Grain Products and Antioxidants. Cereal Foods World, 45 ,59.

    Kanter M. , 'Whole Grain Products and Antioxidants ' (2000 ) 45 Cereal Foods World : 59 -.

  • Vinson, J.A. and Hontz, B.A. (1995): Phenol Antioxidant Index. J.Agric.Food Chem. 43 ,491.

    Hontz B.A. , 'Phenol Antioxidant Index ' (1995 ) 43 J.Agric.Food Chem. : 491 -.

  • Zalatnai, A., Lapis, K., Szende, B., Rásó, E., Telekes, A., Resetár, Á. and Hidvégi, M. (2001): Wheat Germ Extracts Inhibit Experimental Colon in F-344 Rat. Carciogenezis. 22 ,1649.

    Hidvégi M. , 'Wheat Germ Extracts Inhibit Experimental Colon in F-344 Rat ' (2001 ) 22 Carciogenezis. : 1649 -.

    • Search Google Scholar
  • Zielinski, H. and Kozlowska, H. (2000): Antioxidant Activity and Total Phenolics in Selected Cereal Grains and Their Morphological Fractions. J.Agric. Food Chem. 48 ,2008.

    Kozlowska H. , 'Antioxidant Activity and Total Phenolics in Selected Cereal Grains and Their Morphological Fractions ' (2000 ) 48 J.Agric. Food Chem. : 2008 -.

    • Search Google Scholar