Title: Chemical characteristics and antioxidant activity of the laver (Porphyra tenera) grown in southwestern seashore of Korea
Abstract: This study determined the chemical characteristics (proximate composition, lipid and fatty acid composition, pigments and antioxidants) of the laver, and antioxidant activity of methanol‐, water‐, ethanol‐ and methanol‐water (1:1, v/v) extracts of the laver. The laver consisted of moisture, protein, lipid, carbohydrates, and ash at 11.6, 38.4, 0.31, 42.7, and 7.95%, respectively. The laver lipids were consisted of triacylglycerols, 1,2‐diacylglycerols, 1,3‐ diacylglycerols, monoacylglycerols and free fatty acids at 36.1,9.1, 8.7, 20.3, and 25.8%, respectively. Major fatty acid was eicosapentaenoic acid (EPA, 54.4%), with omega‐3 fatty acids totally at 56.6%. Contents of chlorophyll, phycocyanin, phycoerythrin, polyphenols and α‐tocopherol were 392.7, 2,100, 6,930, 8,670, and 0.2 mg/kg, respectively. DPPH radical scavenging activity and reducing power were the highest in the methanol‐water extract of the laver, 93–94 and 75–78%, respectively, of control α‐tocopherol and L‐ascorbic acid. No nitrite scavenging ability was observed in the laver extracts. The results clearly showed the dried laver was a good source of dietary fiber and polyphenols, which could contribute to its high antioxidant activity.
Publication Year: 2012
Publication Date: 2012-04-01
Language: en
Type: article
Indexed In: ['crossref']
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