Abstract

MACHADO, Adriana R.; GRACA, Carolina S.; ASSIS, Leticia M. de  and  SOUZA-SOARES, Leonor A. de. An approach on characteristics and potential assessment of antioxidant extracts from phenolic microalgae Spirulina sp. LEB-18 and Chlorella pyrenoidosa. Rev. de Ciências Agrárias [online]. 2017, vol.40, n.1, pp.264-278. ISSN 0871-018X.  https://doi.org/10.19084/RCA16011.

The object of the study was to evaluate the proximate composition, amino acid profile, protein digestibility, quantification of individual and total phenols and antioxidant effect of phenolic extracts of Spirulina LEB-18 and Chlorella pyrenoidosa front of various methods. The Spirulina and Chlorella microalgae stand out on the nutrient profile and antioxidant activity through different mechanisms, the most important being the scavenging free radicals, which depends on the structure of the compound involved. Microalgae were evaluated for proximate composition, aminogram, protein digestibility in vitro, extraction and quantification of phenolic compounds by high-performance liquid chromatography, as well as, the antioxidant activity through the kidnapping of DPPH (2,2-diphenyl -1 -picrilhidrazil) and ABTS^•+ (2,2'-azinobis (3-ethylbenzthiazoline sulfonic acid-6)), and ß-carotene / linoleic acid system. It is concluded that both microalgae have complete amino acid profile, a good antioxidant activity against the methods used, especially spirulina, which showed higher values compared to Chlorella.

Keywords : amino acid; extracts; profile; radicals.

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