title: Covalently Cross-Linked Arabinoxylans Films for Debaryomyces hansenii Entrapment.
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 × 10(7) CFU∙cm(-2)) 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.
authors.affiliation: Instituto Tecnológico de Tepic, Av. Tecnológico 2595, Tepic, Nayarit 63175, Mexico. rglezestrada@gmail.com.
authors.forename: Ramsés
authors.initials: R
authors.lastname: González-Estrada
authors.affiliation: Instituto Tecnológico de Tepic, Av. Tecnológico 2595, Tepic, Nayarit 63175, Mexico. montserratcalder@gmail.com.
authors.forename: Montserrat
authors.initials: M
authors.lastname: Calderón-Santoyo
authors.affiliation: Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera a La Victoria Km. 0.6, Hermosillo, Sonora 83304, Mexico. ecarvajal@ciad.mx.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Carvajal-Millan
authors.affiliation: Centro de Investigaciones Biológicas del Noroeste, Km. 1 Carretera a San Juan de La Costa "El Comitán", La Paz, BCS 23097, Mexico. ascencio@cibnor.mx.
authors.forename: Felipe de Jesús
authors.initials: Fde J
authors.lastname: Ascencio Valle
authors.affiliation: Instituto Tecnológico de Tepic, Av. Tecnológico 2595, Tepic, Nayarit 63175, Mexico. arturoragazzo@hotmail.com.
authors.forename: Juan Arturo
authors.initials: JA
authors.lastname: Ragazzo-Sánchez
authors.affiliation: Departamento de Polímeros, Universidad de Sonora, Blvd. Luis Encinas y Rosales S/N, Col. Centro, Hermosillo, Sonora 83000, Mexico. fbrown@guaymas.uson.mx.
authors.forename: Francisco
authors.initials: F
authors.lastname: Brown-Bojorquez
authors.affiliation: Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera a La Victoria Km. 0.6, Hermosillo, Sonora 83304, Mexico. arascon@ciad.mx.
authors.forename: Agustín
authors.initials: A
authors.lastname: Rascón-Chu
mesh_terms: D001089:Arabinose / Q000737:chemistry; D003373:Coumaric Acids / Q000737:chemistry; D055165:Debaryomyces / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D012212:Rheology; D014908:Triticum / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014990:Xylans / Q000737:chemistry* / Q000494:pharmacology; D014994:Xylose / Q000737:chemistry
chemical_list: D003373:Coumaric Acids; D005782:Gels; D010936:Plant Extracts; D014990:Xylans; D014867:Water; C085118:arabinoxylan; D014994:Xylose; C004999:ferulic acid; D001089:Arabinose
keywords: arabinoxylans; cells protection; microscopy; rheology