Bioreduction and biosorption of chromium by Undaria pinntifida

Cazón, Josefina Plaza; Landea, María Paz Salazar; Donati, Edgardo R.

doi:10.1016/j.algal.2022.102729

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…In the second region between 1700-1400 cm −1 appears two main bands, mostly associated with the presence of proteins/amino acids in the extract. First, the intense band at 1651 cm −1 can be attributed to carboxylic acid C=O (stretching) and amine N-H (bend-ing), while the weaker band at 1414 cm −1 can be assigned to methyl and methylene C-H (bending), carboxylic acid O-H (bending), and alcohol O-H (bending) [34].…”

Section: Synthesis and Characterization Of Gold And Silver Nanoparticlesmentioning

confidence: 99%

Valorisation of the Invasive Macroalgae Undaria pinnatifida (Harvey) Suringar for the Green Synthesis of Gold and Silver Nanoparticles with Antimicrobial and Antioxidant Potential

et al. 2023

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Bacterial and fungal infections are a challenging global problem due to the reported increasing resistance of pathogenic microorganisms to conventional antimicrobials. Nanomaterials are a promising strategy to fight infections caused by multidrug-resistant microbes. In this work, gold (Au@UP) and silver (Ag@UP) nanoparticles were produced for the first time by green synthesis using an aqueous extract of the invasive macroalgae Undaria pinnatifida (UP). The nanoparticles were characterized by a wide range of physicochemical techniques. Au@UP and Ag@UP demonstrated to be spherical and crystalline with an average size of 6.8 ± 1.0 nm and 14.1 ± 2.8 nm, respectively. Carbohydrates and proteins of the UP extract may participate in the synthesis and capping of the nanoparticles. The UP extract, Ag@UP, and Au@UP were assessed for their antimicrobial activity against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans, and Candida auris. Ag@UP showed the highest antimicrobial activity with very low MIC and MBC values for all the tested bacteria, and Au@UP demonstrated to be very effective against biofilm-producing bacteria. The antifungal properties of both Ag@UP and Au@UP were remarkable, inhibiting hyphae formation. This study points towards a very promising biomedical exploitation of this invasive brown algae.

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Section: Synthesis and Characterization Of Gold And Silver Nanoparticlesmentioning

confidence: 99%