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Rheological Characteristics of Composite Flour with Linseed Fibre - Relationship to Bread Quality

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  • Marie Hrušková

    (Department of Carbohydrates and Cereals, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Prague, Czech Republic)

  • Ivan Švec

Abstract

Linseed fibre represents a rich natural source of dietary fibre. Here, we report that the addition of linseed fibre at levels of 2.5 and 5.0% changes the viscosity of wheat flour as well as the rheological properties of non-fermented and fermented dough. The differences recorded between fibre from golden and brown flax seeds (GF and BF, respectively) were not significant; BF caused a stronger increase in non-fermented dough elasticity. The addition of both variants reduced fermentation times and partially decreased dough volumes during the three phases of the fermentation process. The results of the baking test corresponded with the altered rheological parameters of dough. Based on principal component and cluster analyses, representative features for each rheological test were identified: amylograph maximum (amylograph test), the pasting temperature (RVA test), dough softening degree (farinograph test), extensigraph ratio (extensigraph test) were selected as the representative features. For the evaluation of fermented dough behaviour, wheat flour-linseed fibre composites could be differentiated according to fermentation time (fermentograph test) and dough volume (OTG test). Statistics also confirmed the appropriateness of the crumb firmness parameter for a detailed specification of bread quality.

Suggested Citation

  • Marie Hrušková & Ivan Švec, 2017. "Rheological Characteristics of Composite Flour with Linseed Fibre - Relationship to Bread Quality," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 35(5), pages 424-431.
    • Handle: RePEc:caa:jnlcjf:v:35:y:2017:i:5:id:450-2016-cjfs
    DOI: 10.17221/450/2016-CJFS
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    References listed on IDEAS

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    1. I. Švec & M. Hrušková, 2004. "Wheat flour fermentation study," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 22(1), pages 17-23.
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