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Fish By-Products: A Source of Enzymes to Generate Circular Bioactive Hydrolysates.
In: Molecules, Jg. 28 (2023-02-01), Heft 3, S. 1155-1170
Online
academicJournal
Zugriff:
Fish viscera are usually discarded as waste, causing environmental problems, or as low-value by-products. This study describes a self-sufficient and zero waste approach to obtain enzymes and protein hydrolysates from fish by-products. Firstly, recovery steps of viscera enzymatic extract were applied, and the resulting raw extract was stable at a pH range of 8–9 and at temperatures between 40 and 50 °C. The application of the extracted enzymes and alcalase on fish by-products hydrolysis was also determined. The selected conditions for the enzymatic hydrolysis were 10% (E/S) for 6 h using viscera enzymatic extract and 3% (E/S) for 2 h using alcalase. Fish protein hydrolysates (FPH) proved to have a notable antioxidant capacity with similar activity, ~11 mg ascorbic acid/g dry extract (ABTS assay) and ~150 mg Trolox/g dry extract (ORAC assay). FPH were also able to inhibit the angiotensin-converting enzyme, however, alcalase hydrolysates revealed a higher antihypertensive potential, IC50 of 101 µg of protein/mL. In general, FPH obtained by both enzymes systems maintained these bioactivities after the passage throughout a simulated gastrointestinal tract. The hydrolysates also displayed important technological properties, namely oil absorption capacity (~1 g oil/g sample) and emulsifying property (~40%). Therefore, it will be conceivable to use fish by-products based on a circular economy approach to generate added value compounds for animal and human nutrition. [ABSTRACT FROM AUTHOR]
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Fish By-Products: A Source of Enzymes to Generate Circular Bioactive Hydrolysates.
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Autor/in / Beteiligte Person: | Borges, Sandra ; Odila, Joana ; Voss, Glenise ; Martins, Rui ; Rosa, Ana ; Couto, José António ; Almeida, André ; Pintado, Manuela |
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Zeitschrift: | Molecules, Jg. 28 (2023-02-01), Heft 3, S. 1155-1170 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 1420-3049 (print) |
DOI: | 10.3390/molecules28031155 |
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