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Molecules 2015, 20(6), 11373-11386; doi:10.3390/molecules200611373

Covalently Cross-Linked Arabinoxylans Films for Debaryomyces hansenii Entrapment

1
Instituto Tecnológico de Tepic, Av. Tecnológico 2595, Tepic, Nayarit 63175, Mexico
2
Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera a La Victoria Km. 0.6, Hermosillo, Sonora 83304, Mexico
3
Centro de Investigaciones Biológicas del Noroeste, Km. 1 Carretera a San Juan de La Costa "El Comitán", La Paz, BCS 23097, Mexico
4
Departamento de Polímeros, Universidad de Sonora, Blvd. Luis Encinas y Rosales S/N, Col. Centro, Hermosillo, Sonora 83000, Mexico
*
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 30 March 2015 / Revised: 11 June 2015 / Accepted: 12 June 2015 / Published: 19 June 2015
(This article belongs to the Section Natural Products)
View Full-Text   |   Download PDF [1980 KB, uploaded 19 June 2015]   |  

Abstract

In the present study, wheat water extractable arabinoxylans (WEAX) were isolated and characterized, and their capability to form covalently cross-linked films in presence of Debaryomyces hansenii was evaluated. WEAX presented an arabinose to xylose ratio of 0.60, a ferulic acid and diferulic acid content of 2.1 and 0.04 µg∙mg−1 WEAX, respectively and a Fourier Transform Infra-Red (FT-IR) spectrum typical of WEAX. The intrinsic viscosity and viscosimetric molecular weight values for WEAX were 3.6 dL∙g−1 and 440 kDa, respectively. The gelation of WEAX (1% w/v) with and without D. hansenii (1 × 107 CFU∙cm2) was rheologically investigated by small amplitude oscillatory shear. The entrapment of D. hansenii decreased gel elasticity from 1.4 to 0.3 Pa, probably by affecting the physical interactions between WEAX chains. Covalently cross-linked WEAX films containing D. hansenii were prepared by casting. Scanning electron microscopy images show that WEAX films containing D. hansenii were porous and consisted of granular-like and fibre microstructures. Average tensile strength, elongation at break and Young’s modulus values dropped when D. hansenii was present in the film. Covalently cross-lined WEAX containing D. hansenii could be a suitable as a functional entrapping film. View Full-Text
Keywords: arabinoxylans; rheology; microscopy; cells protection arabinoxylans; rheology; microscopy; cells protection
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

González-Estrada, R.; Calderón-Santoyo, M.; Carvajal-Millan, E.; Valle, F.J.A.; Ragazzo-Sánchez, J.A.; Brown-Bojorquez, F.; Rascón-Chu, A. Covalently Cross-Linked Arabinoxylans Films for Debaryomyces hansenii Entrapment. Molecules 2015, 20, 11373-11386.

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