Evaluation of antioxidant and antibacterial capacity of green microalgae Scenedesmus subspicatus
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Danielli Matias de Macedo Dantas [1] ; Carlos Yure Barbosa De Oliveira [2] ; Romero Marcos Pedrosa Brandão Costa [3] ; Maria das Maria da Graças Carneiro-da-Cunha [3] ; Alfredo Olivera Gálvez ; Ranilson de Souza Bezerra [3]
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[1] Universidade Federal Rural de Pernambuco
Universidade Federal Rural de Pernambuco
Brasil
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[2] Universidade Federal de Santa Catarina
Universidade Federal de Santa Catarina
Brasil
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[3] Universidade Federal de Pernambuco
Universidade Federal de Pernambuco
Brasil
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- Localización: Food science and technology international = Ciencia y tecnología de alimentos internacional, ISSN-e 1532-1738, ISSN 1082-0132, Vol. 25, Nº 4, 2019, págs. 318-326
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
Microalgae are considered one of the most promising raw materials for the development of high value products 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. Different solvents such as 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 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 dimethyl sulfoxide 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 dimethyl sulfoxide showed ability to inhibit the growth of Bacillus subtilis. However, only dimethyl sulfoxide inhibited the growth of Klebsiella pneumoniae and Escherichia coli. Use of the aqueous extract, proven its effectiveness, is an economic protocol and avoids the use of toxic substances.
