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Enzymatic conversion of date fruit fiber concentrates into a new product enriched in antioxidant soluble fiber

AuthorsMrabet, Abdessalem; Rodríguez-Gutiérrez, Guillermo ; Rubio-Senent, Fátima; Hamza, Hammadi; Rodríguez-Arcos, Rocío ; Guillén Bejarano, Rafael ; Sindic, Marianne; Jiménez Araujo, Ana
KeywordsDate fruit
Date fiber concentrate
Soluble dietary fiber
Enzymatic hydrolysis
Prebiotic oligosaccharides
Issue DateJan-2017
CitationLWT - Food Science and Technology 75: 727–734 (2017)
AbstractSoluble dietary fiber (SDF) has got increasing interest because of its prebiotic effects and technological applications. The enzymatic hydrolysis is an effective treatment to convert insoluble dietary fiber (IDF) into SDF. Date fiber concentrate (DFC) is a very good source of dietary fiber, but its IDF/SDF ratio is very high. In this study an enzymatic treatment has been optimized to enrich DFC in SDF: Viscozyme® L from Novozymes A/S at 2.38 mL enzyme/100 mL reaction volume, in a solid/liquid ratio 1 g/35 mL, at 55 °C during 30–60 min. In these conditions, the amount of SDF increased from 1.8–6.3 to 5.4 g/100 g, and the ratio IDF/SDF changed from 19 to 2–3. In the SDF, besides an increase in the antiradical activity, gluco-, manno-, and xylo-oligosaccharides have been identified. Their molecular weights varied in a wide range, depending of hydrolysis duration, which suggests that this enzymatic treatment could be a promising process for obtaining tailor-made prebiotic oligosaccharides.
Description32 Páginas; 7 Tablas; 3 Figuras
Publisher version (URL)http://dx.doi.org/10.1016/j.lwt.2016.10.017
Appears in Collections:(IG) Artículos
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