The Peroxidase/H2O2 System as a Free Radical-Generating Agent for Gelling Maize Bran Arabinoxylans: Rheological and Structural Properties

Martínez-López, Ana L.; Carvajal-Millan, Elizabeth; Lizardi-Mendoza, Jaime; López-Franco, Yolanda L.; Rascón-Chu, Agustín; Salas-Muñoz, Erika; Barron, Cécile; Micard, Valérie
October 2011
Molecules;Oct2011, Vol. 16 Issue 10, p8410
Academic Journal
The oxidative gelation of maize bran arabinoxylans (MBAX) using a peroxidase/H2O2 system as a free radical-generating agent was investigated. The peroxidase/H2O2 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 (ρc) and a mesh size (ξ) of 49 × 10³ g/mol, 30 × 10-6 mol/cm³ and 193 nm, respectively.


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