Anais CBFic - Volume 1 - 2018

Sociedade Brasileira de Ficologia - SBFic

Publicado em 26/11/2018

Volume 1 - 2019

Título do Trabalho

EVALUATION OF ANTIOXIDANT AND ANTIBACTERIAL CAPACITY OF GREEN MICROALGAE SCENEDESMUS SUBSPICATUS

Autores

DANIELLI MATIAS DE MACEDO DANTAS, CARLOS Y. B. OLIVEIRA, ROMERO M. P. B. COSTA, MARIA G. CARNEIRO-DA-CUNHA, ALFREDO OLIVERA GALVEZ, RANILSON S. BEZERRA

Modalidade

Resumo

Área Temática

3 BIOTECNOLOGIA E INOVAçõES

Data de Publicação

26/11/2018

País da Publicação

Brasil

Idioma da Publicação

Português

Página do Trabalho

http://sbfic.org.br/anais_show/140

ISSN

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Palavras-Chave

bioactive activities, extracts, phytochemical

Resumo

Microalgae are considered one of the most promising raw materials for the development of high value products (HVPs) for pharmaceuticals, nutraceuticals and cosmetic industries, as well as being potential sources of protein, vitamins, and minerals for human consumption. Hence, the present research focuses extraction of antioxidant and antimicrobial compounds from Scenedesmus subspicatus using solvents of different polarities. Various solvents (ethanol, methanol, butanol, acetone, dimethyl sulfoxide and water) were used to extract compounds from the green microalgae S. subspicatus and then they were examined for phytochemical screening, antioxidant activity, and antimicrobial properties. In vitro free radical quenching and total antioxidant activity of extracts were investigated with 1,1-diphenyl-2-picryl hydrazyl (DPPH), and compared with catequin and gallic acid as positive controls. The antimicrobial activity was evaluated in gram-negative and gram-positive bacteria. Aqueous extracts and DMSO presented better performance in phytochemical analysis. This result showed consistency in the sequential tests. The antioxidant activity was also better using the two solvents cited above. The extracts acetone, water, and DMSO showed ability to inhibit the growth of B. subtilis. However, only DMSO inhibited the growth of K. pneumoniae and E. coli. Use of the aqueous extract, proven its effectiveness, is an economic protocol and avoids the use of toxic substances in antioxidants and antibacterial products with the green microalgae Scenedesmus subspicatus.