title: Characterization of water extractable arabinoxylans from a spring wheat flour: rheological properties and microstructure.
abstract: In the present study water extractable arabinoxylans (WEAX) from a Mexican spring wheat flour (cv. Tacupeto F2001) were isolated, characterized and gelled and the gel rheological properties and microstructure were investigated. These WEAX presented an arabinose to xylose ratio of 0.66, a ferulic acid and diferulic acid content of 0.526 and 0.036 µg/mg WEAX, respectively and a Fourier Transform Infra-Red (FT-IR) spectrum typical of arabinoxylans. The intrinsic viscosity and viscosimetric molecular weight values for WEAX were 3.5 dL/g and 504 kDa, respectively. WEAX solution at 2% (w/v) formed gels induced by a laccase as cross-linking agent. Cured WEAX gels registered storage (G') and loss (G'') modulus values of 31 and 5 Pa, respectively and a diferulic acid content of 0.12 µg/mg WEAX, only traces of triferulic acid were detected. Scanning electron microscopy analysis of the lyophilized WEAX gels showed that this material resembles that of an imperfect honeycomb.
authors.affiliation: Laboratory of Biopolymers, CTAOA. Research Center for Food and Development, CIAD, A.C. Carretera a La Victoria Km. 0.6, Hermosillo, Sonora 83304, Mexico. adriana.morales@estudiantes.ciad.mx
authors.forename: Adriana
authors.initials: A
authors.lastname: Morales-Ortega
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Carvajal-Millan
authors.forename: Yolanda
authors.initials: Y
authors.lastname: López-Franco
authors.forename: Agustín
authors.initials: A
authors.lastname: Rascón-Chu
authors.forename: Jaime
authors.initials: J
authors.lastname: Lizardi-Mendoza
authors.forename: Patricia
authors.initials: P
authors.lastname: Torres-Chavez
authors.forename: Alma
authors.initials: A
authors.lastname: Campa-Mada
mesh_terms: D003373:Coumaric Acids / Q000032:analysis; D005782:Gels / Q000737:chemistry; D062385:Hydroxybenzoates / Q000032:analysis; D042845:Laccase / Q000032:analysis; D010936:Plant Extracts / Q000032:analysis / Q000737:chemistry*; D011134:Polysaccharides / Q000032:analysis; D011506:Proteins / Q000032:analysis; D012212:Rheology; D017550:Spectroscopy, Fourier Transform Infrared; D014908:Triticum / Q000737:chemistry*; D014783:Viscosity; D014990:Xylans / Q000032:analysis / Q000737:chemistry*
chemical_list: D003373:Coumaric Acids; D005782:Gels; D062385:Hydroxybenzoates; D010936:Plant Extracts; D011134:Polysaccharides; D011506:Proteins; D014990:Xylans; C085118:arabinoxylan; C004999:ferulic acid; D042845:Laccase; C017616:phenolic acid