Microalgae-based unsaponifiable matter as source of natural antioxidants and metal chelators to enhance the value of wet Tetraselmis chuii biomass

Open Chemistry

Custódio Luísa¹  Barreira Luísa¹  Gangadhar Katkam N.¹  Varela João¹  Pereira Hugo¹  Rodrigues Maria João¹  Malcata F. Xavier² 

[1] Centre of Marine Sciences, University of Algarve, Faculty of Sciences and Technology, Ed. 7, Campus of Gambelas, Faro, Portugal;LEPABE-Laboratory of Engineering of Processes and Department of Chemical Engineering, University of Porto, Rua Dr. Roberto Frias s/n, P-4200-465 Porto, Portugal;

关键词: tetraselmis chuii;    unsaponifiable matter;    antioxidants;    metal chelators;    phenolics;   

DOI  :  10.1515/chem-2016-0029

来源: DOAJ

【 摘 要 】

The present work aimed to determine the antioxidant, metal chelating and neuroprotective potential of the unsaponifiable matter (UM) of Tetraselmis chuii to be applied to a biorefinery setting. The UM obtained via saponification from crude lipids extracted from microalgal wet biomass showed a radical scavenging activity (RSA) towards the DPPH radical of 90.7±1.3% and 57.1±1.2% at a concentration of 10 and 5 mg/mL, respectively. The UM fraction also displayed metal chelating capacity at a concentration of 5 mg/mL: 58.5±1.4% and 50.9±4.0% for copper and iron, respectively. The chemical characterization of the UM revealed significant levels of total phenolics (TPC, 13.61 mg GAE/g) and carotenoids (2.45 mg/g of β-carotene, lutein and violaxanthin). Overall, the separation of the UM containing high value metabolites might significantly upgrade the total wet biomass value in a biorefinery, allowing the exploitation of a stream with relevant antioxidant and metal chelating activities.

【 授权许可】

Unknown