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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: 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
Förläggare: AMER CHEMICAL SOC
Publiceringsår: 2003
Tidskrift: Journal of Agricultural and Food Chemistry
Tidskriftsakronym: J AGR FOOD CHEM
Volym: 51
Nummer: 26
Artikelns första sida, sidnummer: 7600
Artikelns sista sida, sidnummer: 7606
Antal sidor: 7
ISSN: 0021-8561


Abstrakt

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.


Nyckelord

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

Senast uppdaterad 2019-09-12 vid 02:51