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Radical-scavenging and antioxidant activity of avenanthramides
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
2009 (English)In: Food Chemistry, ISSN 0308-8146, E-ISSN 1873-7072, Vol. 113, no 2, 550-556 p.Article in journal (Refereed) Published
Abstract [en]

Avenanthramides are amides of cinnamoyl-anthranilic acids and, among cereals, are exclusively found in oats. This study investigated the structure-antioxidant activities of 15 avenanthramides with different substitution patterns in the two aromatic rings, seven of which were new avenanthramides synthesised and characterised in this study. Radical-scavenging activity was tested as reactivity towards 1,1-diphenyl-2-picrylhydrazyl (DPPH-). The activity increased with the number of radical-stabilising groups ortho to the phenolic hydroxy group. Both aromatic rings were independently important for activity, while conjugation across the amide bond was of minor importance. Antioxidant activity was determined as inhibition of linoleic acid oxidation. In contrast to the radical-scavenging activity, antioxidant activity was observed for most avenanthramides, and also for compounds with only one hydroxy group in either of the aromatic rings. Compared with alpha-tocopherol, the avenanthramides protected linoleic acid from oxidation to a smaller extent initially, but the effect lasted for a longer time.

Place, publisher, year, edition, pages
2009. Vol. 113, no 2, 550-556 p.
Keyword [en]
Antioxidants; Avenanthramides; 1, 1-Diphenyl-2-picrylhydrazyl; DPPH; Linoleic acid; Oats
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-8300DOI: 10.1016/j.foodchem.2008.07.101ISI: 000261084600027Scopus ID: 2-s2.0-53949094995OAI: oai:DiVA.org:miun-8300DiVA: diva2:134131
Available from: 2009-01-18 Created: 2009-01-18 Last updated: 2017-10-09Bibliographically approved
In thesis
1. Naturally occurring phenols with antioxidant, antifungal and anti-browsing activity
Open this publication in new window or tab >>Naturally occurring phenols with antioxidant, antifungal and anti-browsing activity
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University, 2014. 68 p.
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 198
National Category
Chemical Sciences
Identifiers
urn:nbn:se:miun:diva-24028 (URN)978-91-87557-77-4 (ISBN)
Public defence
2014-09-26, 11:00
Supervisors
Available from: 2015-01-02 Created: 2015-01-02 Last updated: 2015-03-13Bibliographically approved

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