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Molecules 2011, 16(10), 8410-8418; doi:10.3390/molecules16108410
Communication

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

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Received: 18 August 2011 / Revised: 22 September 2011 / Accepted: 22 September 2011 / Published: 10 October 2011
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Abstract

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 (x) of 49 × 103 g/mol, 30 × 10−6 mol/cm3 and 193 nm, respectively.
Keywords: arabinoxylan gels; free radicals; oxidative cross-linking arabinoxylan gels; free radicals; oxidative cross-linking
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.

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Martínez-López, A.L.; Carvajal-Millan, E.; Lizardi-Mendoza, J.; López-Franco, Y.L.; Rascón-Chu, A.; Salas-Muñoz, E.; Barron, C.; Micard, V. The Peroxidase/H2O2 System as a Free Radical-Generating Agent for Gelling Maize Bran Arabinoxylans: Rheological and Structural Properties. Molecules 2011, 16, 8410-8418.

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