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Chemical characteristics and antioxidant activity of the laver (Porphyra tenera) grown in southwestern seashore of Korea
Author(s) -
Lee Kyongae,
Shin Malshik,
Oh Soojung,
Choe Eunok
Publication year - 2012
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.26.1_supplement.1025.1
Subject(s) - chemistry , porphyra , antioxidant , food science , tenera , polyphenol , phycoerythrin , dpph , eicosapentaenoic acid , fatty acid , ascorbic acid , tocopherol , biochemistry , polyunsaturated fatty acid , botany , vitamin e , algae , biology , flow cytometry , genetics , palm oil
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.