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KMID : 0380620100420040431
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Korean Journal of Food Science and Technology
2010 Volume.42 No. 4 p.431 ~ p.437
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Effects of Gamma Irradiation on Antioxidant, Antimicrobial Activities and Physical Characteristics of Sargassum thunbergii Extract
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Lee So-Jeong
Yoon So-Young
Song Eu-Jin
Kwak Ji-Hee
Kim Koth-Bong-Woo-Ri
Lee Chung-Jo
Jung Ji-Yeon
Park Na-bi
Park Jin-Gyu
Kim Jae-Hun
Choi Jong-Il
Lee Ju-Woon
Byun Myung-Woo
Ahn Dong-Hyun
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Abstract
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This study was carried out to determine the effect of gamma irradiation (3-20 kGy) on the antioxidant, antimicrobial activities and physical characteristics of Sargassum thunbergii (ST) extracts. When ST powder was treated by gamma irradiation, the yields and total phenolic compounds (TPC) of water extracts were increased, but radical scavenging activities were not changed. When ST extract was irradiated, the TPC and DPPH radical scavenging activities were increased. In addition, gamma irradiation of ST extract decreased viscosity and removed color. These results suggest that gamma irradiation would be a useful method for improving the physical characteristics of ST extract while maintaining native biological activities.
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KEYWORD
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Sargassum thunbergii, antioxidant, antimicrobial, physical characteristics, gamma irradiation
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