title: The peroxidase/H2O2 system as a free radical-generating agent for gelling maize bran arabinoxylans: rheological and structural properties.
abstract: The oxidative gelation of maize bran arabinoxylans (MBAX) using a peroxidase/H(2)O(2) system as a free radical-generating agent was investigated. The peroxidase/H(2)O(2) system led to the formation of dimers and trimer of ferulic acid as covalent cross-link structures in the MBAX network. MBAX gels at 4% (w/v) presented a storage modulus of 180 Pa. The structural parameters of MBAX gels were calculated from swelling experiments. MBAX gels presented a molecular weight between two cross-links (Mc), a cross-linking density (ρ(c)) and a mesh size (x) of 49 × 103 g/mol, 30 × 10-6 mol/cm3 and 193 nm, respectively.
authors: CTAOA, Laboratory of Biopolymers, Research Center for Food and Development, CIAD, AC., Hermosillo, Sonora 83000, Mexico.
authors: Ana L
authors: AL
authors: Martínez-López
authors: Elizabeth
authors: E
authors: Carvajal-Millan
authors: Jaime
authors: J
authors: Lizardi-Mendoza
authors: Yolanda L
authors: YL
authors: López-Franco
authors: Agustín
authors: A
authors: Rascón-Chu
authors: Erika
authors: E
authors: Salas-Muñoz
authors: Cécile
authors: C
authors: Barron
authors: Valérie
authors: V
authors: Micard
mesh_terms: D003373:Coumaric Acids; D005609:Free Radicals / Q000378:metabolism*; D005782:Gels / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000378:metabolism*; D010084:Oxidation-Reduction; D009195:Peroxidase / Q000378:metabolism*; D014990:Xylans / Q000737:chemistry / Q000378:metabolism* / Q000648:ultrastructure; D003313:Zea mays / Q000737:chemistry / Q000378:metabolism* / Q000648:ultrastructure
chemical_list: D003373:Coumaric Acids; D005609:Free Radicals; D005782:Gels; D014990:Xylans; C085118:arabinoxylan; C004999:ferulic acid; D006861:Hydrogen Peroxide; D009195:Peroxidase