Impact of arabinoxylan addition on protein microstructure formation in wheat and rye dough

Clemens Döring, Christian Nuber, Florian Stukenborg, Mario Jekle, Thomas Becker

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

The aim of this study was the identification and characterization of the impact of different Arabinoxylan (AX) concentrations (0.0%; 2.5%; 5.0%; 7.5%; 10.0%) on the protein microstructure formation of wheat and rye model dough which were adjusted to the same dough firmness by water calibration. The microstructural characterization was achieved by means of confocal-laser-scanning-microscopy micrographs that were evaluated by an image processing tool. The rheological behavior of the AX treated dough was characterized by oscillation and creep recovery tests. Wheat and rye dough micrograph analyses exhibited a decrease in perimeter and feret diameter of the protein network with increasing AX concentration of approx. 63% and 54%, respectively. Rheological investigations showed that the viscoelastic part of the wheat and rye model dough determined loss factor (tan δ) increased with increasing AX concentration by 148% and 285%, respectively. The results prove the impact of AX on protein microstructure formation in dough.

Original languageEnglish
Pages (from-to)10-16
Number of pages7
JournalJournal of Food Engineering
Volume154
DOIs
StatePublished - Jun 2015

Keywords

  • Arabinoxylan
  • CLSM
  • Protein microstructure
  • Rheology
  • Rye flour
  • Wheat flour

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