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Lipids and antioxidants in groats and hulls of Swedish oats ( Avena sativa L)
Author(s) -
Bryngelsson Susanne,
MannerstedtFogelfors Birgitta,
KamalEldin Afaf,
Andersson Roger,
Dimberg Lena H
Publication year - 2002
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.1084
Subject(s) - avena , chemistry , food science , antioxidant , cinnamic acid , composition (language) , rice hulls , chemical composition , botany , organic chemistry , biology , linguistics , philosophy
Concentrations and compositions of total lipids (TL), fatty acids, tocopherols and tocotrienols, avenanthramides and free hydroxycinnamic acids were determined in groats and hulls from single samples of seven Swedish oat cultivars. Total antioxidant capacity (TAC) was measured using the radical 1,1‐diphenyl‐2‐picrylhydrazyl as substrate. Results were evaluated by principal component analysis. Consistent differences in value of the variables analysed in groats and hulls were found, groats having higher concentrations of all compounds analysed except free cinnamic acids. Concentrations of E‐vitamers (especially tocotrienols) were high in both groat and hull samples with high TL. Avenanthramides were high in hull samples with high TL, but this was not found in groats. Free cinnamic acids did not follow TL in either groats or hulls. TAC was generally higher in groats than in hulls. The within‐group variation in TAC was less pronounced than that in chemical composition, especially in groats. The results did not suggest any strong relationship between TAC and individual antioxidants. © 2002 Society of Chemical Industry