Rheological qualities of dough from mixture of flour and wheat bran and possible correlation between bra bender and mixolab Chopin equipments

Abstract

The rheological qualities of dough are determined during the mixing, extension and warming of the dough and they are closely correlated with the quality of the flour, however by increasing the amount of the dietary fibers, the qualities change, given that this leads to weakening of the proteins, respectively to the deterioration of gluten net. The equipment which is used in determining the rheological qualities is those of Bra bender: Farinograph, Extensograph, however, lately one also started to use Mixolab Chopin, which at the same time determines the quality of the proteins and starch. The purpose of this study is to determine the rheological qualities of the dough obtained by mixing the flour of wheat cultivars from the region of Balkans with their bran, and the possible correlation of rheological parameters determined with Bra bender (Farinograph) and Mixolab Chopin equipments. Based on the obtained results either with the Bra bender equipment, or with Mixolab Chopin, better rheological qualities for production of bread are indicated by the bread which is obtained by mixing the flour of wheat cultivar Orovcanka with its bran. High positive correlation coefficient is observed with regards to water absorption and development of dough, the stability of dough indicates a lower positive correlation coefficient, whereas the degree of softening indicates a medium negative correlation coefficient. With regards to the correlation coefficient among the values of Amylograph regarding the maximum viscosity and C3-torque Mixolab, as well as Amylograph concerning the maximum viscosity and slope gMixolab, in both cases we observed a medium positive correlation. Therefore, in general, the correlation between equipment Bra bender and Chopin Mixolab is positive, however not so prominent, respectively, variable.