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KMID : 1160620030080010085
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Preventive Nutrition and Food Science
2003 Volume.8 No. 1 p.85 ~ p.88
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Effect of Gamma Irradiation on the Biological Activities and Color Changes of Ethanol Extracts Lonicera japonica
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Jeon Tae-Woog
Jo Cheo-Run
Shin Myung-Gon
Cha Bo-Sook
Kim Mi-Jung
Byun Myung-Woo
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Abstract
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Effects of irradiation on color removal, tyrosinase inhibition, xanthine oxidase inhibition and nitrite scavenging capacity of Lonicera japonica extracts were evaluated. Lonicera japonica extracts were irradiated at 10, 20, and 30 kGy. Hunter color L*- and a*-values increased but b*-values decreased dose-dependently following irradiation. The extracts were potent inhibitors of tyrosinase and xanthine oxidase. Tyrosinase inhibition was higher in the irradiated sample than non-irradiated, and subsequently increased with increasing irradiation doses. The extracts had a higher inhibitory effect against xanthine oxidase, and the effect was not changed by irradiation. Nitrite scavenging capacity was the highest in the extract at pH 1.2, and was not significantly affected by irradiation. These results indicate that gamma irradiation may not influence the biological activities of Lonicera japonica extracts when irradiated up to 30 kGy. Furthermore, color of the extracts can be improved to have improved applicability for the food and cosmetic industries without any adverse change in biological functions.
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KEYWORD
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Lonicera japonica, irradiation biological activities, color
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