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http://dx.doi.org/10.3746/jkfn.2016.45.12.1725

Antioxidant Compounds and Activities of Methanolic Extracts from Steam-Dried Allium hookeri Root  

Jun, Hyun-Il (Department of Food Science and Technology, Chonbuk National University)
Yang, Jae-Heon (Center for Healthcare Technology Development, Chonbuk National University)
Song, Geun-Seoup (Department of Food Science and Technology, Chonbuk National University)
Kim, Young-Soo (Department of Food Science and Technology, Chonbuk National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.45, no.12, 2016 , pp. 1725-1731 More about this Journal
Abstract
This study was carried out to investigate the effects of steam-drying on antioxidant compounds and antioxidant activity of Alliun hookeri root (AHR). The yield of methanolic extracts, total phenolic content (TPC), browning intensity (280 nm and 420 nm), and organosulfur compound contents (alliin and cycloalliin) in raw and steam-dried AHRs were 10.71~37.40%, $15.53{\sim}36.36{\mu}g/mg$, 0.48~2.09, 0.01~0.25, $1.46{\sim}700.61{\mu}g/mg$, and $1,173.95{\sim}2,182.60{\mu}g/mg$, respectively. Yield, TPC, and browning intensity of AHRs increased by steam-drying, whereas organosulfur compound contents decreased. Of all methanolic extracts from raw and steam-dried AHRs, four-time steam-drying showed the lowest $EC_{50}$ values (0.43, 7.53, 0.34, and 0.48 mg/mL, respectively) for DPPH radical scavenging activity, ABTS radical scavenging activity, SOD-like activity, and reducing power, whereas four-time steam-drying resulted in the highest TPC ($36.36{\mu}g/mg$) and browning intensity (2.09 and 0.25 at 280 and 420 nm, respectively). The antioxidant activities of methanolic extracts from raw and steam-dried AHRs were closely correlated with their TPC, browning intensity, and organosulfur compound content, showing correlation determination coefficient ($R^2$) values higher than 0.82. As a result, four-time steam-drying of AHRs could be useful as potential antioxidant sources.
Keywords
steam-drying; Allium hookeri root; methanol extracts; antioxidant compounds; antioxidant activities;
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Times Cited By KSCI : 14  (Citation Analysis)
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