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KMID : 1098420060140010008
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Korean Journal of Medicinal Crop Science
2006 Volume.14 No. 1 p.8 ~ p.13
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Effects of Drying Methods on Content of Active Components, Antioxidant Activity, and Color Values of Saururus chinensis Bail
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Kim Min-Ja
Kim In-Jae
Nam Sang-Young
Lee Cheol-Hee
Song Beom-Heon
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Abstract
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This study was carried out to investigate drying methods for keeping freshness and active components of aerial part of Saururus chinensis. Chopped samples were prepared using hot air drying, hot air drying + roasting, presteamed + hot air drying, freeze drying, and sun drying. Drying time was shorter 88{sim}93% in hot air drying and freeze drying than in sun drying. Percentage of dry matter was higher in the order of freeze drying > sun drying > hot air drying, and moisture content in the order of sun drying > hot air drying > freeze drying. The contents of total phenolics and quercetin related substances were greater in the order of freeze drying > hot air drying > sun drying, while were decreased due to treatments before or after hot air drying. Electron donating ability (EDA) was highest in freeze drying, and showed a little difference between hot air drying and sun drying, but was increased because of treatments before or after hot air drying. In color values, the a value was lower in the order of freeze drying < hot air drying < sun drying. The contents of active components of plant parts of hot air dried were higher in the order of flower >leaf > chopped sample > stem. EDA showed similar tendency with those. The a value was lower in the order of leaf < chopped sample < flower < stem. As a result, freeze drying of chopped samples or hot air drying of leaf and flower were effective to maintain qualities of aerial part of Saururus chinensis.
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KEYWORD
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Saururus chinensis, drying methods, active component, electron donating ability, color values
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