Characterization of some extractive fractions isolated from raw Allium cepa L. bulbs.
Many recent studies have showed that onion (Allium cepa L.) has antioxidant effect which could be of great importance for prevention and treatment of different diseases: diabetes, cancer, cardiovascular and neurodegenerative disorders. The aim of this study was to investigate the antioxidant capacity of two extracts isolated from fresh onion bulbs: an hydroalcoholic extract (codified EC1) and an aqueous extract (codified EC2).


METHODS
Antioxidant capacity was evaluated by three different assays: DPPH scavenging assay, H2O2, scavenging assay and reducing power assay.


RESULTS
Both investigated extracts possess interesting antioxidant properties which are significantly influenced by their chemical composition.
Tătărîngă
Gabriela
G
Department of Organic Chemistry, School of Pharmacy, "Gr.T. Popa" University of Medicine and Pharmacy Iaşi.
Miron
Anca
A
Păduraru
Ioana
I
Hăncianu
Monica
M
Gafiţanu
Eliza
E
Stănescu
Ursula
U
D000975:Antioxidants / Q000737:chemistry* / Q000494:pharmacology; D016166:Free Radical Scavengers; D006801:Humans; D006861:Hydrogen Peroxide; D019697:Onions / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry* / Q000627:therapeutic use*; D018517:Plant Roots / Q000737:chemistry
D000975:Antioxidants; D016166:Free Radical Scavengers; D010936:Plant Extracts; D006861:Hydrogen Peroxide