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KMID : 1011620100260010018
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Korean Journal of Food and Cookey Science
2010 Volume.26 No. 1 p.18 ~ p.25
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Antioxidative Activities of Enzymatic Digests from Dried Citrus unshiu and Citrus grandis Peels
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현재석:Hyon Jae-Seok
강성명:Kang Sung-Myung/마힌다:Mahinda Senevirathne/고원준:Koh Won-Joon/양태석:Yang Tai-Suk/오명철:Oh Myung-Cheol/오창경:Oh Chang-Kyung/전유진:Jeon You-Jin/김수현:Kim Soo-Hyun
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Abstract
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This study was carried out to investigate the total polyphenol and flavonoid contents and antioxidative activities of enzymatic digests from dried Citrus unshiu and C. grandis peels. The yields of digests from dried C. unshiu and C. grandis peels were high in viscozyme (a carbohydrase) and kojizyme (a protease), and enzymatic digests from dried C. grandis peels appeared highly comparable to those of C. unshiu. Total polyphenol contents were high in ultaflo (a carbohydrase) and alcalase and flavourzyme (proteases), and the digests from dried C. unshiu peels appeared high in comparison to C. grandis. Total flavonoid contents were high in ultaflo, alcalase, and water extract. DPPH radical scavenging activities appeared very high in digests from dried C. grandis peels in comparison to C. unshiu, and was the highest in viscozyme and kojizyme. The viscozyme digest displayed particularly high activity. Hydrogen peroxide scavenging activities increased somewhat with increasing amounts of digests, but displayed very high activity, more than 91%, except kojizyme the digest from dried C. unshiu peel, at 2.0 ㎎/mL. Alkyl radical scavenging activities increased rapidly with increasing amounts of digest, and all enzyme digests from dried C. unshiu and C. grandis peels displayed very high activities at more than 0.5 ㎎/mL. Hydroxyl radical scavenging activities increased rapidly with increasing amounts of digests, and all enzymatic digests from dried C. unshiu and C. grandis peels displayed relatively low activities in comparison to other activated oxygen species.
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KEYWORD
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Citrus unshiu, Citrus grandis, dried peels, enzymatic digests, antioxidative activities
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