Antioxidant Activity of Knotwood Eextractives and Phenolic Compounds of Selected Tree Species

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Stefan M. Willför, Markku O. Ahotupa, Jarl E. Hemming, Markku H. T. Reunanen, Patrik C. Eklund , Rainer E. Sjöholm, Christer S. E. Eckerman, Suvi P. Pohjamo, and Bjarne R. Holmbom
Publication year: 2003
Journal: Journal of Agricultural and Food Chemistry
Journal acronym: J AGR FOOD CHEM
Volume number: 51
Issue number: 26
Start page: 7600
End page: 7606
Number of pages: 7
ISSN: 0021-8561


The antioxidant potency and the radical scavenging capacity of superoxide and peroxyl radicals were assessed for 13 hydrophilic knotwood extracts of commercially important wood species, or fractions thereof, as well as for five pure wood-derived lignans and the flavonoid taxifolin. The chemical composition of the knotwood extracts was determined by gas chromatography combined with mass spectrometry. Most of the investigated wood species were rich in hydrophilic extractives (10-20% of the dry wood) with one or a few compounds dominating in each extract. All extracts had a high antioxidative potency and/or radical scavenging capacity as compared to the well-known antioxidants Trolox and butylated hydroxyanisole. The pure wood-derived lignans and taxifolin also had a high antioxidative potency and/or radical scavenging capacity. However, the antioxidant potency and/or radical scavenging capacity of several of the hydrophilic knotwood extracts were higher than that of the dominating compounds in pure form.


antioxidant potency, branch base, flavonolds, juvabiones, knots, knotwood, lignans, oligolignans, phenolic compounds, pinosylvins, radical scavenging

Last updated on 2020-02-06 at 05:40