Antioxidant and radical
scavenging activities of onion skin extracts were generally high, results were comparable
to that of BHT. Extracts from onion edible part showed somewhat lower activity. Furthermore,
high activity of skin extracts against bacteria Escherichia coli, Pseudomonas
fluorescens and Bacillus cereus and fungi Aspergillus niger, Trichoderma viride and
Penicillium cyclopium was observed. Antimicrobial activity of edible part extracts
against tested microorganisms is generally lower, while for Escherichia coli no growth
inhibition was observed