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  1. No Access

    Article

    Measuring key human carbohydrate digestive enzyme activities using high-performance anion-exchange chromatography with pulsed amperometric detection

    Carbohydrate digestion in the mammalian gastrointestinal tract is catalyzed by α-amylases and α-glucosidases to produce monosaccharides for absorption. Inhibition of these enzymes is the major activity of the ...

    Elizabeth Barber, Michael J. Houghton, Rizliya Visvanathan… in Nature Protocols (2022)

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    Article

    The use of flavonoid aglycones in in vitro systems to test biological activities: based on bioavailability data, is this a valid approach?

    The majority of in vitro assays on biological activities of flavonoids have used the aglycone form as the test compound. This form is readily available from commercial sources and comparable approaches have been ...

    Gary Williamson in Phytochemistry Reviews (2002)

  3. No Access

    Chapter

    Glycosylation, Esterification, and Polymerization of Flavonoids and Hydroxycinnamates: Effects on Antioxidant Properties

    Dietary flavonoids and hydroxycinnamates are effective antioxidants that may affect health and are also important for food preservation. Of the flavonoids, quercetin is a common representative and is found in ...

    Gary Williamson, Geoff W. Plumb, Maria T. Garcia-Conesa in Plant Polyphenols 2 (1999)

  4. No Access

    Chapter

    Human Metabolism of Dietary Quercetin Glycosides

    Flavonoids, along with other phytochemicals, are thought to have a role in reducing the risk of chronic diseases such as coronary heart disease and cancers.1,2 Fruits and vegetables undoubtedly afford some protec...

    Andrea J. Day, Gary Williamson in Plant Polyphenols 2 (1999)