The effect of the selected emulsifiers (E471, DATEMand SYTREM) and final fermentation time on reduction of staling and improvement of physical properties of Barbari bread using composite wheat- potato flour

Quality enhancement and shelf life extension of bread as main meal in Iran is one of the particular importance to people’s health and national economy. So that the purpose of this study were planned to investigation on the effects of emulsifiers (E471، DATEM and SYTREM) in levels of 0، 0. 25، 0. 5 and 0. 75 % and final fermentation time in 30، 45 and 60 minute on dough rheology (Amylogram and Farinogram) and quantitative and qualitative properties (texture، volume، porosity، crust color and overall acceptability) of composite bread. Porosity and crust color were estimated and analyzed by image J software. The results showed viscosity، dough development time، stability and valometervalue increased by increasing the amount of emulsifierswhereasgelatinationtemperaturewas decreased. AlsoDATEM and SYTREM were more effective as compared tocontrols inwaterabsorption. Experiments showed that the sample with 0. 5% DATEM and 45 minutes final fermentation time had the lowest firmness and the highest overall acceptability. On the other hand DATEM، E471 and SYTREM and 30، 45 and 60 min the final fermentation time respectively had the pronounce effect on increasing volume and porosity of the bread samples. Regarding to color estimation the L* value was increased by addition of emulsifiers especially DATEM to the bread formulation. However the highest L* value was observed in samples 45، 60 and 30 min final fermentation time respectively.