The Nutritional Composition and Antioxidant Activity from Undariopsis peterseniana

Abstract

The proximate composition, free amino acid composition and mineral contents from Undariopsis peterseniana were determined, and the antioxidant activities of ethanol (EtOH) and hot water extracts of U. peterseniana were investigated using DPPH (1,1-diphenyl-1-picrylhydrazyl), ABTS (2,2'azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)) radical scavenging effects and reducing power. The contents of moisture, ash, protein, lipid and carbohydrate were 12.5%, 23.1%, 9.7%, 0.2% and 54.5%, respectively, and alginic acid content was 12.3%. The major free amino acid contents were alanine, phenylalanine, aminoethanol, valine, glutamic acid and phosphoserine. Ca (1589.1 mg) was the largest mineral followed by Na (344.6 mg), Mg (74.3 mg), Zn (10.2 mg) and Fe (1.5 mg). The total phenolic contents of EtOH and hot water extracts were exhibited at 15.7 and 4.3 mg GAE/g sample, respectively. The antioxidant activity of EtOH extract exhibited strong ABTS and DPPH radical scavenging activities with reducing power, and hot water extract also demonstrated strong ABTS radical scavenging effects. Therefore, the results of this study suggest that U. peterseniana contained an abundance of naturally occurring nutrients (free amino acids and minerals), and the strong antioxidant activities of EtOH and hot water extracts from U. peterseniana could be good sources of natural antioxidants for healthcare products.

Characterization of Ecklonia cava Alginate Films Containing Cinnamon Essential Oils

“…Alginate extraction from Ecklonia cava was performed as reported previously [ 38 , 39 ]. Ground Ecklonia cava in 0.025% H 2 SO 4 solution (1:50, w / v ) was stirred for 3 h. After filtration, the residue was washed with distilled water and filtered again.…”

Effect of inhibition on tyrosinase and melanogenesis of Agastache rugosa Kuntze by lactic acid bacteria fermentation

“…To assess antioxidant activity, the reducing power of the extracts was measured using the methods of Cho et al 15 In detail, 500 lL of A. rugosa extracts, 500 lL of 0.2 M sodium phosphate buffer, and 500 lL of 1% potassium ferricyanide were mixed in a tube and allowed to react for 20 min at 50°C. After this reaction time, 500 lL of 10% trichloroacetic acid was added, and the mixture was centrifuged for 10 min at 1413g.…”

Undariopsis peterseniana Promotes Hair Growth by the Activation of Wnt/β-Catenin and ERK Pathways

“…Several studies have focused on the cultivation of U. peterseniana [ 20 , 21 ]. The antioxidant activity of U. peterseniana has also been demonstrated by using the DPPH radical scavenging assay [ 22 ]. However, the effects of U. peterseniana on hair growth, and the underlying mechanisms of action, have not been investigated.…”