Document Type: Research Paper
Department of Genetics and Morphology, University of Brasilia, Brasilia, Brazil.
Institute of Biodiversity and Forests, Federal University of Western Pará, Pará, Brazil.
Microbiology Laboratory, Federal University of Western Pará, Pará, Brazil.
Laboratory of Basic and Applied Bacteriology, State University of Londrina, Londrina, Brazil.
In this study, we report the green synthesis of silver nanoparticles (AgNPs) from extracts of native fruits from Amazonia, Brazil. AgNPs were characterized by UV/Vis and medium infrared (MIR) spectroscopy. Their antimicrobial activities were evaluated against the growth of bacteria and leavers, as well as the evaluation of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The colloidal solutions had a maximum absorption peak around 440 nm, as was well reported in the literature for colloidal silver. The MIR spectra identified the functional groups of carboxylic acids and several phenolic compounds as possible factors responsible for the stabilization and coating of AgNPs. All synthesized AgNPs showed antimicrobial activity against Candida albicans, Escherichia coli and Staphylococcus aureus. In this sense, the obtained results showed that the native plants of Amazonia have potential to be used for the green synthesis of AgNPs and that more studies related to their applications should be performed.