Characterization of phenolic constituents in hazelnut kernels
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- Takashi Uchikura
- Department of Pharmacognosy, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Ehime , Japan
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- Tomoe Kitano
- Department of Pharmacognosy, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Ehime , Japan
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- Morio Yoshimura
- Department of Pharmacognosy, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Ehime , Japan
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- Yoshiaki Amakura
- Department of Pharmacognosy, College of Pharmaceutical Sciences, Matsuyama University , Matsuyama, Ehime , Japan
説明
<jats:title>ABSTRACT</jats:title> <jats:p>Hazelnuts contain biologically active phenolic compounds and are widely used for their nutritional value. In this study, the phenolic compounds contained in hazelnuts were isolated from the kernels of Corylus avellana L. and investigated. Spectral analyses revealed 2 new acetophenone glycosides, characterized as 2′,4′,6′-trihydroxyacetophenone-4′-O-(2-O-β-d-apiosyl)-β-d-glucoside and 2′,4′,6′-trihydroxyacetophenone-4′-O-(2-O-β-d-apiosyl-6-O-α-l-arabinosyl)-β-d-glucoside, and 4 known compounds. Four high-molecular-mass condensed tannin fractions were detected in the water-soluble fraction of the extract, characterized as B-type procyanidin consisting of extension and terminal units. Gel permeation chromatography analyses revealed that the average molecular mass, based on the polystyrene standard, was approximately 15 000-113 000. These high-molecular-mass condensed tannin fractions were chemically characterized and exhibited different molecular weights. The fractions of high-molecular-mass condensed tannins were obtained from hazelnuts and tested for 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity. The EC50 values indicated significant activity for all the fractions.</jats:p>
収録刊行物
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- Bioscience, Biotechnology, and Biochemistry
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Bioscience, Biotechnology, and Biochemistry 87 (7), 688-695, 2023-04-10
Oxford University Press (OUP)
