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- Title
Free Radical Scavenging and Leukemia Cell Growth Inhibitory Properties of Onion Powders Treated by Different Heating Processes.
- Authors
FU, H. Y.
- Abstract
BSTRACT: Methanol extracts of onion powder dried by hot air (60 °C), vacuum (35 °C), and lyophilization (35 °C) were used to study the effects of drying method on the quercetin composition and the subsequent antioxi-dative changes. It was found that hot air-dried onion had higher radical scavenging activities in both DPPH and peroxide radicals than those of the freeze- and vacuum-dried onions. HPLC analyses showed that freeze- and vacuum-dried onions contained more quercetin glycosides, whereas hot air-dried onion dominated in aglycone. A strong cell proliferation inhibition activity in hot air-dried onion was observed for leukemia cell lines CEM and U937, whereas freeze- and vacuum-dried onions gave comparatively moderate inhibition. Low cell proliferation inhibition was obtained in 3 dried onions for leukemia cell lines K562, P3HR-1, and Raji.
- Subjects
FREE radicals; LEUKEMIA; ONIONS; CELL proliferation; HIGH performance liquid chromatography; CELL lines
- Publication
Journal of Food Science (Wiley-Blackwell), 2004, Vol 69, Issue 1, pSNQ50
- ISSN
0022-1147
- Publication type
Article
- DOI
10.1111/j.1365-2621.2004.tb17886.x