Effect of exogenous factors on malt quality
2009
Prokes, J.,Vyzkumny Ustav Pivovarsky a Sladarsky, Brno (Czech Republic). Sladarsky Ustav | Fiserova, H.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic) | Helanova, A.,Vyzkumny Ustav Pivovarsky a Sladarsky, Brno (Czech Republic). Sladarsky Ustav | Hartmann, J.,Ustredni Kontrolni a Zkusebni Ustav Zemedelsky, Brno (Czech Republic)
The aim of this study was to test the effects of steeping technology, water content and the length of germination period on the quality of malt under conditions of a changing composition of gas present in a layer of germinating kernels of spring barley (intergrain gas). Targeted changes in its composition enable to simulate individual (potential) technologies of malting. This enabled to use the technology of floor malting with a minimum ventilation and exchange of intergrain gas. In addition, barley germination in two other conditions, a modified atmosphere (i.e. with changing concentrations of ethylene) and in a continuous ventilation during the whole period of germination, was tested. It was demonstrated that a modified composition of intergrain gas can influence the final quality of malt. Low concentrations of added ethylene showed a positive effect on the values of relative extract at 45 deg C. The composition of intergrain gas also influenced malt homogeneity and modification.
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