Antioxidant properties and lipid composition of selected microalgae

Antioxidant properties and lipid composition of selected microalgae Marine and freshwater microalgae were evaluated for their antioxidant properties and lipid composition. Both lipophilic (L) and hydrophilic (H) oxygen radical absorbance capacity (ORAC) values were measured. Among the tested microalgae, the marine −1 microalga Nannochloropsis granulata showed the highest total ORAC value at 6948 μmol TE (100 g) ,followedbythe −1 freshwater species Neochloris oleoabundans at 4508 μmol TE (100 g) and Scenedesmus obliquus at 4406 μmol TE −1 (100 g) of algal biomass. Freeze-dried algal biomass was also examined for lipid content by the Folch method. Lipid content ranged from 30.9 to 49.3% and linear regression analysis revealed a statistically significant correlation between the lipid content and the ORAC values. Tested microalgae showed moderate and dose-dependent DPPH radical scavenging activity. The total −1 phenol assay shows that marine microalga Tetraselmis chui had the highest phenolic content at 57.5 μmol GAE g and N. −1 oleoabundans had the lowest at 26.6 μmol GAE g of MeOH extract. A statistically significant correlation was detected between DPPH radical scavenging activity and the phenolic content. Fatty acid analysis revealed that polyunsaturated fatty acids constituted > 45% of the total fatty acid content in N. oleoabundans, Phaeodactylum tricornutum, Porphyridium aerugineum, S. obliquus,and −1 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Phycology Springer Journals

Antioxidant properties and lipid composition of selected microalgae

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Crown
Subject
Life Sciences; Plant Sciences; Freshwater & Marine Ecology; Plant Physiology; Ecology
ISSN
0921-8971
eISSN
1573-5176
D.O.I.
10.1007/s10811-018-1523-1
Publisher site
See Article on Publisher Site

Abstract

Marine and freshwater microalgae were evaluated for their antioxidant properties and lipid composition. Both lipophilic (L) and hydrophilic (H) oxygen radical absorbance capacity (ORAC) values were measured. Among the tested microalgae, the marine −1 microalga Nannochloropsis granulata showed the highest total ORAC value at 6948 μmol TE (100 g) ,followedbythe −1 freshwater species Neochloris oleoabundans at 4508 μmol TE (100 g) and Scenedesmus obliquus at 4406 μmol TE −1 (100 g) of algal biomass. Freeze-dried algal biomass was also examined for lipid content by the Folch method. Lipid content ranged from 30.9 to 49.3% and linear regression analysis revealed a statistically significant correlation between the lipid content and the ORAC values. Tested microalgae showed moderate and dose-dependent DPPH radical scavenging activity. The total −1 phenol assay shows that marine microalga Tetraselmis chui had the highest phenolic content at 57.5 μmol GAE g and N. −1 oleoabundans had the lowest at 26.6 μmol GAE g of MeOH extract. A statistically significant correlation was detected between DPPH radical scavenging activity and the phenolic content. Fatty acid analysis revealed that polyunsaturated fatty acids constituted > 45% of the total fatty acid content in N. oleoabundans, Phaeodactylum tricornutum, Porphyridium aerugineum, S. obliquus,and −1

Journal

Journal of Applied Phycology – Springer Journals

Published: May 31, 2018

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