Journal
EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS
Volume 76, Issue 2, Pages 793-795Publisher
SPRINGER
DOI: 10.1007/s00107-017-1280-x
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Funding
- Forest Research Institute [260801]
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Extraction efficiency of total polyphenols and flavonoids from bark oak (Quercus robur L.) grown in the central region of Poland was evaluated. The total phenolics of water and 60% ethanol and extracts were in the range of 55.4-60.4 and 71.0-79.3 mg gallic acid/g of bark, respectively, while the total flavonoid content in these extracts were determined in the range of 35.1-38.0 and 72.0-78.4 mg catechin/g. The hydroalcoholic extracts exhibited higher DPPH radical scavenging activity than BHT (butylated hydroxytoluene), popular food additives.
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