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http://dx.doi.org/10.5352/JLS.2007.17.12.1734

Change of Biological Activity of Strawberry by Frozen Storage and Extraction Method  

Youn, Sun-Joo (Biofarmer Co. Ltd.)
Cho, Jun-Gu (Biofarmer Co. Ltd.)
Choi, Ung-Kyu (Department of Oriental Medicinal Food and Nutrition, Asia University)
Kwoen, Dae-Jun (Department of Oriental Medicine Resource, Asia University)
Publication Information
Journal of Life Science / v.17, no.12, 2007 , pp. 1734-1738 More about this Journal
Abstract
The biological activities of strawberry were investigated during frozen storage. The concentrations of total phenolic content in strawberry juice and water extract were $2.342{\mu}g/ml\;and\;2.235{\mu}g/ml$, respectively. The total flavonoid content in strawberry juice and water extract were $200.36{\mu}g/ml\;and\;201.07 {\mu}g/ml$. 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.
Keywords
Strawberry; frozen storage; antioxidant activity; phenol; flavonoid;
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