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Title: Gels of ferulated arabinoxylans extracted from distillers dried grains with solubles: rheology, structural parameters and microstructure

Author
item MENDEZ-ENCINAS, MAYRA - Center For Research In Food And Development (CIAD)
item CARVAJAL-MILLAN, ELIZABETH - Center For Research In Food And Development (CIAD)
item Yadav, Madhav
item VALENZUELA-SOTO, ELISA - Center For Research In Food And Development (CIAD)
item FIGUEROA-SOTO, CIRIA - Center For Research In Food And Development (CIAD)
item TORTOLEDO-ORTIZ, ORLANDO - Center For Research In Food And Development (CIAD)
item GARCIA-SANCHEZ, GUILLERMINA - Center For Research In Food And Development (CIAD)

Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: 5/27/2016
Publication Date: 9/1/2016
Citation: Mendez-Encinas, M.A., Carvajal-Millan, E., Yadav, M.P., Valenzuela-Soto, E.M., Figueroa-Soto, C.G., Tortoledo-Ortiz, O., Garcia-Sanchez, G. 2016. Gels of ferulated arabinoxylans extracted from distillers dried grains with solubles: rheology, structural parameters and microstructure. In: Masuelli, M., and Renard, D. editors. Advances in Physicochemical Properties of Biopolymers. Part 1. Bentham Science, Emirate of Sharjah, United Arab Emirates. p. 202-214.

Interpretive Summary:

Technical Abstract: One of the major by-products of bioethanol production is distillers dried grains with solubles (DDGS). Maize is one of the main sources for the production of this biofuel. In this way, dietary fiber represents the principal fraction of DDGS, which could be a potential source of added-value biomolecules such as ferulated arabinoxylans (AX). In this chapter, ferulated arabinoxylans extracted from DDGS (DDGAX) were gelled and the gels were studied in terms of rheology, structural parameters and microstructural characteristics. The DDGAX were formed into gels at 2% (w/v) and were induced by laccase. The mechanical spectrum and strain sweep of DDGAX gel presented the typical behavior of a solid-like material. The gel swelling ratio (43 g water/g DDGAX) suggests the formation of a compact polymeric network which decreased the water uptake of the gel. DDGAX gels have an average mesh size value of 96 nm. The surface of the gels was analyzed by scanning electron microscopy revealing a heterogeneous microstructure resembling a honeycomb. These results indicate that ferulated arabinoxylans from DDGS form elastic and macroporous gels presenting a microstructure with irregular pore sizes.