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Open AccessArticle

Evaluation of the Antioxidant Capacities of Antarctic Macroalgae and Their Use for Nanoparticles Production

1
Departamento de Química Inorgánica, CINBIO, Universidade de Vigo, 36310 Vigo, Spain
2
Centro de Investigación Marina, Universidade de Vigo, 36331 Vigo, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Marco Baron
Molecules 2021, 26(4), 1182; https://doi.org/10.3390/molecules26041182
Received: 8 February 2021 / Revised: 16 February 2021 / Accepted: 20 February 2021 / Published: 23 February 2021
(This article belongs to the Special Issue Gold Coordination Chemistry and Applications)
Macroalgae are sources of bioactive compounds that are interesting from both a chemical and a medical point of view. Although their use in biomedicine has increased significantly in recent years, tests conducted to date have been mostly related to species from temperate latitudes, with the potential application of Antarctic biodiversity being minor. The wide variety of algae species present on Antarctic coastal areas can be a source of new antioxidants. Bearing this in mind, the brown macroalgae Desmarestia antarctica (DA) and the red Iridaea cordata (IC) were selected for the preparation of aqueous extracts with the aim of analyzing their antioxidant activity. This analysis was performed by determining reducing power, total phenolic content, and 2,2-diphenyl-1-picrylhydrazyl free radical scavenging activity. Furthermore, both extracts were employed to synthesize gold and silver nanoparticles. The nanomaterials were fully characterized by means of UV-Visible spectroscopy, transmission electron microscopy, Z potential measurements, and Fourier transform infrared spectroscopy, which confirmed the formation of stable, spherical nanoparticles with mean diameters of 13.7 ± 3.1 and 17.5 ± 3.7 nm for [email protected] and [email protected] and 12.6 ± 1.9 and 12.3 ± 1.6 nm for [email protected] and [email protected] Antioxidant assays were performed after the synthesis of the nanomaterials to evaluate their possible synergistic effect with the extracts. The results suggest that polysaccharides and proteins may play a key role in the process of reduction and stabilization. Finally, for the sake of comparison, the results obtained for the Antarctic macroalgae Desmarestia menziesii and Palmaria decipiens have also been considered in the present work. View Full-Text
Keywords: Desmarestia antarctica; Iridaea cordata; green synthesis; gold nanoparticles; silver nanoparticles; reducing power; total phenolic content; DPPH scavenging activity Desmarestia antarctica; Iridaea cordata; green synthesis; gold nanoparticles; silver nanoparticles; reducing power; total phenolic content; DPPH scavenging activity
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MDPI and ACS Style

González-Ballesteros, N.; Rodríguez-Argüelles, M.C.; Lastra-Valdor, M. Evaluation of the Antioxidant Capacities of Antarctic Macroalgae and Their Use for Nanoparticles Production. Molecules 2021, 26, 1182. https://doi.org/10.3390/molecules26041182

AMA Style

González-Ballesteros N, Rodríguez-Argüelles MC, Lastra-Valdor M. Evaluation of the Antioxidant Capacities of Antarctic Macroalgae and Their Use for Nanoparticles Production. Molecules. 2021; 26(4):1182. https://doi.org/10.3390/molecules26041182

Chicago/Turabian Style

González-Ballesteros, N.; Rodríguez-Argüelles, M. C.; Lastra-Valdor, M. 2021. "Evaluation of the Antioxidant Capacities of Antarctic Macroalgae and Their Use for Nanoparticles Production" Molecules 26, no. 4: 1182. https://doi.org/10.3390/molecules26041182

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