Antioxidant capacity and lipophilic content of seaweeds collected from the Qingdao coastline.
Lipophilic extracts from 16 species of seaweeds collected along the Qingdao coastline were screened and evaluated for their antioxidant activities (AA) using the beta-carotene-linoleate assay system. The diethyl ether soluble extracts of all selected seaweeds exhibited various degrees of antioxidative efficacy in each screen. The highest antioxidant capacities among the tested samples were observed for Rhodomela confervoides and Symphyocladia latiuscula and were comparable with that of the well-known antioxidant butylated hydroxytoluene and greater than that of propyl gallate. The lipophilic content of all 16 samples and the chemical composition of 4 selected seaweeds, R. confervoidesand S. latiuscula, which had higher AA, Laminaria japonica, which had intermediate AA, and Plocamium telfairiae, which had lower AA, were analyzed by gas chromatography and gas chromatography-mass spectrometry, respectively. Fatty acids and alkanes were found. The present data indicated an increase in antioxidative property with increasing content of unsaturated fatty acid. The result of this study suggests that seaweeds can be considered as a potential source for the extraction of lipophilic antioxidants, which might be used as dietary supplements or in production in the food industry. This is the first report on the antioxidant activities of lipophilic extracts from seaweeds.
Huang
Hai-Lan
HL
Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China.
Wang
Bin-Gui
BG
D000473:Alkanes / Q000032:analysis; D000975:Antioxidants / Q000032:analysis*; D002849:Chromatography, Gas; D005227:Fatty Acids / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry; D019787:Linoleic Acid / Q000737:chemistry; D010084:Oxidation-Reduction; D012624:Seaweed / Q000737:chemistry*; D013624:Taiwan; D019207:beta Carotene / Q000737:chemistry
D000473:Alkanes; D000975:Antioxidants; D005227:Fatty Acids; D019207:beta Carotene; D019787:Linoleic Acid