Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6490804 | Journal of Biotechnology | 2015 | 23 Pages |
Abstract
In order to promote Moroccan natural resources, this study aims to evaluate the potential of microalgae isolated from Moroccan coastlines, as new source of natural antioxidants. Different extracts (ethanolic, ethanol/water and aqueous) obtained from 9 microalgae strains were screened for their in vitro antioxidant activity using DPPH free radical-scavenging assay. The highest antioxidant potentials were obtained in Dunalliela sp., Tetraselmis sp. and Nannochloropsis gaditana extracts. The obtained results indicate that ethanol extract of all microalgae strains exhibit higher antioxidant activity, when compared to water and ethanol/water extracts. Therefore, total phenolic and carotenoid content measurement were performed in active ethanol extracts. The PUFA profiles of ethanol extracts were also determined by GC/MS analysis. The studied microalgae strains displayed high PUFA content ranging from 12.9 to 76.9 %, total carotenoids content varied from 1.9 and 10.8Â mg/g of extract and total polyphenol content varied from 8.1 to 32.0Â mg Gallic acid Equivalent/g of extract weight. The correlation between the antioxidant capacities and the phenolic content and the carotenoids content were found to be insignificant, indicating that these compounds might not be major contributor to the antioxidant activity of these microalgae. The microalgae extracts exerting the high antioxidant activity are potential new source of natural antioxidants.
Keywords
DPPHBHTButylatedhydroxytolueneSFABHAFRAPTEACMUFA2, 2-diphenyl-1-picrylhydrazylROSPolyunsaturated fatty acidsPUFAmonounsaturated fatty acidsMicroalgaeTrolox equivalent antioxidant capacityFAMEAntioxidant activityfatty acid methyl estersPhenolic contentferric reducing antioxidant potentialReactive oxygen species
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Bioengineering
Authors
Amal Maadane, Nawal Merghoub, Tarik Ainane, Hicham El Arroussi, Redouane Benhima, Saaid Amzazi, Youssef Bakri, Imane Wahby,