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Title

Functional, antioxidant and film-forming properties of tuna-skin gelatin with a brown algae extract

AuthorsHaddar, Anissa; Sellimi, Sabrine; Ghannouchi, Raouia; Martínez Álvarez, Óscar ; Nasri, M.; Bougatef, Ali
KeywordsTuna
Pepsin
Physicochemical composition
Functional properties
Gelatin film
Gelatin
Issue Date2012
PublisherElsevier
CitationInternational Journal of Biological Macromolecules 51: 477- 483 (2012)
AbstractCharacteristics and functional properties of gelatin from skin of Atlantic Bluefin tuna (Thunnus thynnus) were investigated. The gelatin was extracted by an acid-swelling process in the presence of different concentrations of commercial pepsin, followed by subsequent heating. The extraction yield was higher when increasing concentrations of pepsin were used during the swelling process. Emulsion activity index, foam formation ability and foam stability of gelatin increased with the increase of gelatin concentration. Antioxidant properties (ferric-reducing ability and DPPH-radical-scavenging capacity) of gelatin-based edible films containing aqueous or methanolic extracts of brown algae (Cystoseira barbata) were also assessed. For comparative purposes, tuna-skin gelatin edible film with BHA was studied. Antioxidant properties of the films were increased significantly when natural extracts were added. Extracts of brown algae could be useful additives to obtain edible films from tuna-skin gelatin with interesting functional and antioxidant properties. © 2012 Elsevier B.V.
URIhttp://hdl.handle.net/10261/95894
DOI10.1016/j.ijbiomac.2012.06.016
Identifiersdoi: 10.1016/j.ijbiomac.2012.06.016
issn: 0141-8130
Appears in Collections:(ICTAN) Artículos
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