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Carbohydrates from leaves, stems, and tubers of cultivated Helianthus tuberosus were studied. The quantitative contents of mono-and oligosaccharides, water-soluble polysaccharides, pectinic substances, and hemicellulose were determined. The qualitative monosaccharide composition and physical chemical properties were found. The amino-acid composition was determined. It was shown that syrup from the tubers exhibited hypoglycemic activity.

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