Vol - 25, Issue - 2
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[This article belongs to Volume - 25, Issue - 2]
International Medical Journal
Journal ID : IMJ-05-02-2020-207
Total View : 154

Abstract : Antioxidant phlorotannins are the high-value biopolymer in brown algae. The paper focused on the impact of cobalt-60 irradiation on phlorotannin content and antioxidant activities of brown algae Sargassum serratum commonly found growing in the tropical marine area of South Center, Vietnam. The irradiation dose (0, 5, 10, 15, 20, 25 kGy) and techniques (dry-and wet-irradiation) was studied. The results showed the various cobalt-60 irradiation of doses and techniques affected phlorotannin content and antioxidant activities (p<0.05) that changed according to the non-linear equation and close correlation (R2 > 0.9). Phlorotannin content was the highest at an irradiation dose of 5 kGy. Total antioxidant, reducing power and DPPH free radical scavenging activity of the species got the highest value at an irradiation dose of 25 kGy, corresponded to 0.827 ± 0.019 mg ascorbic acid equivalent/g DW, 0.273 ± 0.006 mg FeSO4 equivalent/g DW and 70.27 ± 1.85%, respectively. The impact of wet irradiation techniques on antioxidant phlorotannins were stronger, compared to dry irradiation techniques

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