Antibacterial Activity of Silver Nanoparticles extracted from Betanin Pigments of Beta vulgaris L. And Amaranthus tricolor L. International Journal of Food and Nutritional Sciences, [S. l.], v. 11, n. 7, p. 1180–1193, 2022. Disponível em: https://www.ijfans.org/index.php/Journal/article/view/6710. Acesso em: 13 aug. 2026.