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KMID : 0613820070170121734
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Journal of Life Science
2007 Volume.17 No. 12 p.1734 ~ p.1738
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Change of Biological Activity of Strawberry by Frozen Storage and Extraction Method
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Youn Sun-Joo
Cho Jun-Gu
Choi Ung-Kyu
Kwon Dae-Jun
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Abstract
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The biological activities of strawberry were investigated during frozen storage. The concentrations of total phenolic content in strawberry juice and water extract were 2.342 μg/ml and 2.235 μg/ml, respectively. The total flavonoid content in strawberry juice and water extract were 200.36 μg/ml and 201.07 μg/ml, respectively. Antioxidant activities of strawberry juice and water extract were determined. The DPPH of strawberry juice (94.2%) was higher than the water extract of strawberry (93.5%). ABTS of strawberry juice and water extract were 99.9% and 100.0%, respectively. Xanthine oxidase inhibitory activity and SOD-like activity of strawberry of water extracts were higher than those of strawberry juice. The changes in the antioxidant activity of strawberry was insignificant until 6 months of frozen storage. Therefore, it was expected that frozen storage of strawberry was useful preservation expedient for consistent supply of raw materials.
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KEYWORD
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Strawberry, frozen storage, antioxidant activity, phenol, flavonoid
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