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Physico-chemical and metabolomic characterization of KAMUT® Khorasan and durum wheat fermented dough.

Food chemistry (2015-05-16)
Federica Balestra, Luca Laghi, Danielle Taneyo Saa, Andrea Gianotti, Pietro Rocculi, GianGaetano Pinnavaia
ABSTRACT

Investigations were made in order to evaluate the influence of the flour type, chemical acidification and fermentation on characteristics of doughs obtained with durum wheat and KAMUT® Khorasan flour. Doughs were observed immediately after mixing, 90 and 360 min of leavening at 30 °C. Fundamental rheology, yeasts heat production by isothermal microcalorimetry and the interaction between water and biopolymers by means of time domain nuclear magnetic resonance were evaluated. In addition aromatic metabolite development was followed by means of the combined application of gas-chromatography and electronic nose. KAMUT® Khorasan flour was found to be more suitable than durum wheat for the fermentation processes tested, especially at acidic conditions, as shown by the increase of the volume and the metabolic heat production by yeast. In acidified dough the pattern of volatile metabolites allowed a clear distinction between the types of dough. Moreover the water/starch proton pool was characterized by higher T2 values in the KAMUT® Khorasan samples.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Lactic acid solution, ACS reagent, ≥85%
Sigma-Aldrich
Lactic acid, 85%, FCC
Sigma-Aldrich
Lactic acid, meets USP testing specifications
Sigma-Aldrich
Lactic acid, natural, ≥85%
Sigma-Aldrich
DL-Lactic acid, 85 % (w/w), syrup