Abstract
The microalga Spirulina has been marketed in many countries due to its application in foods, especially for its high protein content, which can be used to obtain protein hydrolysates. Protein hydrolysates are easily absorbed by the gastrointestinal tract and have significant physiological properties, because during the hydrolysis process, peptides with antioxidant activity can be obtained. The objective of this study was to obtain enzymatic hydrolysates from the biomass of Spirulina sp. LEB 18 with functional properties and antioxidant potential. This study was a 22 type central composite design, to determine the best conditions for obtaining hydrolysates. The hydrolysis reactions of Spirulina biomass were carried out using the enzyme Protemax 580 L. The enzymatic hydrolysis of the proteins resulted in increased digestibility, solubility, water-retention capacity and antioxidant activity of hydrolysates (which increased by 1.8, 2.8 and 8.5 using the reducing power methods, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2’ azino-bis (3-ethylbenzthiazoline-6-sulphonic acid) (ABTS), respectively). Therefore, biologically active peptides of Spirulina sp. LEB 18 biomass were produced. Key words: Protein hydrolysate, microalga, active peptide.
Highlights
Microalgae are unicellular and multicellular from freshwater and marine systems that possess very large industrial potential (Pignolet et al, 2013)
These results show that the enzymatic hydrolysis of Spirulina proteins created peptides with antioxidant activity
This study enabled us to increase the antioxidant activity and functional properties of the hydrolysates
Summary
Microalgae are unicellular and multicellular from freshwater and marine systems that possess very large industrial potential (Pignolet et al, 2013). Microalgal biomass and its derivatives can be applied in various fields, such as supplements in animal feed, in human nutrition, medicines and biofuels (Mostafa, 2012). They have many benefits when used in foods, because they produce various substances such as vitamins, minerals, pigments, proteins and lipids. It has strong potential to be used in the extraction of valuable biocompounds This microalga is “generally recognized as safe” (GRAS) certified by the Food and Drug Administration (FDA), which guarantees that it can be used as a food and drug, when grown and processed within the required health and safety standards for foods (Fox, 1996). This microalga has been the subject of extensive research regarding: the extraction of phycocyanin and the benefits caused by the intake of this
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