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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

Journal article

Flavonoids. A class of semi-essential food components: Their role in human nutrition  [1976]

Kuhnau, Joachim.;

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Abstract: A review of flavonoids discusses their chemistry, the fate of food flavonoids, (in the gastrointestinal tract) and their nutritional effects. These materials are comprised of flavanones, flavones, flavonols, flavandiols, catechins, and flavylium compounds. The antioxidant activity of food flavonoids is described and discussed, as well as their metal-chelating capacity and its effect on the activity of enzyme and membrane function. Vegetable foods rich in flavonoids are marked by an unusual stability of their Vitamin C content. The antibiotic and/or bacteriostatic effects of flavonoids are discussed, as well as their contribution to both the maintenance of body cell integrity and defense against malignant degeneration (via an anti-carcinogenic activity). (wz)

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World review of nutrition and dietetics

ISSN : 0084-2230