e-Journal
Paper Type ![]() |
Contributed Paper |
Title ![]() |
Antioxidant and Antimicrobial Properties of a Brown Alga Scytosiphon lomentaria |
Author ![]() |
Xiao Juan Xu, Yu Zhang, Hong Lin, Chao Kang, Xiao Ting Fu* |
Email ![]() |
xiaotingfu@ouc.edu.cn |
Abstract: The antioxidant activities and antimicrobial activities of dried Scytosiphon lomentaria, a brown alga, were studied in this research. Four isolation methods were adopted for the extraction of total phenols. The yield of total phenols was in the order of hot-water extract > ethanol extract > hot-water/ethanol extract > cold-water/ethanol extract. Antioxidant activities of extracts prepared by the above isolation methods were tested, including 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging, ferrous ion chelating, reducing power, scavenging of hydroxyl radical, and anti-lipid peroxidation activities. A hot water extract showed strong antioxidant activities in assays including DPPH radical-scavenging, ferrous ion chelating, and reducing power. On the other hand, a cold water/ethanol extract displayed the highest hydroxyl radical scavenging activity and anti-lipid peroxidation effect, and higher than the control. The hot-water and ethanol extracts of S. lomentaria showed similar antimicrobial activity on Escherichia coli, the growth-free zone of inhibition was 11 mm, 9 mm respectively. The result indicated that S. lomentaria is an excellent resource with application potential as a healthy food. |
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Start & End Page ![]() |
595 - 604 |
Received Date ![]() |
2012-03-09 |
Revised Date ![]() |
|
Accepted Date ![]() |
2013-02-03 |
Full Text ![]() |
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Keyword ![]() |
Scytosiphon lomentaria, phenol, antioxidant activity, antimicrobial activity |
Volume ![]() |
Vol.44 No.2 (April 2017) |
DOI |
|
Citation |
Xu X.J., Zhang Y., Lin H., Kang C. and Fu* X.T., Antioxidant and Antimicrobial Properties of a Brown Alga Scytosiphon lomentaria, Chiang Mai Journal of Science, 2017; 44(2): 595-604. |
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