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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Jan 2014, 35 (1)                                                                                                             Back

nstantaneous and historical temperature effects on a-pinene

Effects of g-irradiation on the color and biological activity of

ethanol extracts of the brown seaweed Ecklonia cava


Jae-Suk Choi1, Bo-Bae Lee1, Kee Hun Do1, Hee-Jung Bae1, Jae Hak Sohn2, Kwang Keun Cho3 and In Soon Choi1, 4*

1RIS Center, Industry-Academic Cooperation Foundation, Silla University, Busan-617 736, Republic of Korea

2Department of Biofood Materials, Silla University, Sasang-gu, Busan-617 736, Republic of Korea

3Department of Animal Resources Technology, Gyeongnam National University of Science and Technology,

150 Chilam-dong, Jinju, Gyeongnam-660 758, Republic of Korea

4Department of Biological Science, Silla University, Busan-617 736, Republic of Korea

*Corresponding Author E-mail:




 Publication Data

Paper received:

20 June 2012


Revised received:

18 December 2012


Re-revised received:

01 May 2013



03 June 2013



This study examined the effect of g-irradiation on the biological and physical characteristics of brown seaweed, Ecklonia cava ethanol extracts, with the goal of improving their industrial applications. Samples were irradiated with Co60 g rays at doses of 130 kGy, after which their color was evaluated. In addition, their antioxidant properties, DPPH radical scavenging activity, inhibition of NO synthesis, and anti-Propionibacterium acnes activity were investigated. The results showed that the Hunter color L value increased with irradiation in a dose-dependent manner, resulting in extracts that were lighter than the non-irradiated samples, while the Hunter color a and b values decreased with irradiation. Irradiation treatment did not alter the antimicrobial activity, rather it decreased the antioxidant properties and DPPH radical scavenging activity and inhibited NO synthesis. In the safety test of irradiated E. cava extracts, acute toxicity test using mice and a cytotoxicity assay on the murine macrophage cell line RAW264.7 suggested that irradiated E. cava extracts can be safely used by humans at moderate doses. In conclusion, g-irradiation lightened the color of E. cava ethanol extracts, lessening its limitations for use as a raw material in the cosmetic and pharmaceutical industries, without adversely affecting its biological activity.


 Key words

Acne vulgaris, Cosmetics, Ecklonia cava, Seaweed, g-irradiation,



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