ATIVIDADE FOTODINÂMICA E CONCEITOS: UM EXPERIMENTO DEMONSTRATIVO

• Main Authors: Ana Claudia Pedrozo da Silva, Camila Fabiano de Freitas, André Luiz Tessaro, Wilker Caetano, Silvana Maria de Oliveira Santin, Noboru Hioka, Graciana Freitas Palioto
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química
• Series: Química Nova
• Subjects: photodynamic therapy; methylene blue; erythrosine B, LED, inactivation of microorganism
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422018000600706&lng=en&tlng=en

A simple and low cost experiment is proposed to chemistry students associating the Photodynamic Activity involving Chemical and Biochemical concepts. The inclusion of this experiment in undergraduate courses in Chemistry promotes interdisciplinarity and contextualization, combining current and relevant topics to the teaching of program content. The experiment used the Methylene Blue and Erythrosine B as dyes to demonstrate the photodynamic action of these photosensitizers in the inhibition of microbial growth. Both dyes presented satisfactory results against environmental microorganisms. The growth inhibition was caused exclusively by the photochemical processes undergone by the dye/light/oxygen, with LED light exposure.