The Effect of Native and Acetylated Wheat Starches on Reological Properties of Dough and Quality of Barbari Bread

The main aim of this study was to determine the effects of acetylated wheat starch (AWS) addition in different levels on the properties of dough and bread. Therefore, Syneresis and Pasting properties of Native wheat starch (NWS) and acetylated wheat starch (AWS) was investigated. Effects of incorporation of 5, 10 and 15% of those starches on properties of wheat flour were determined by using a Rapid Visco Analyzer (RVA). Then, Rheological properties of dough were determined by Farinograph and Extensograph. After measuring mass, volume and sensory evaluation, staling analysis was done by seven trained panelist, texture analyzer and moisture content was determined in 1, 3 and 5 days. Measuring syneresis and pasting properties indicated that best viscosity properties and Lower syneresis observed in AWS. The farinograph results showed a decrease in the water absorption in comparison to control but no significant difference was observed in arrival time and development time. According to Extensograph results, resistance to extension of samples containing starch was significantly more than control sample and extension ability in all treatments was significantly lower than control. Addition of both of starches resulted in reduction of bread volume and specific volume compared to control. Data obtained from sensory evaluation showed, AWS significantly resulted in the highest score in quality properties. According to the results of staling tests (sensory evaluation, texture analysis and moisture content determination), addition of AWS was successful in retarding of staling. Overall results revealed that the incorporation of 5% AWS improves the quality of Barbari bread.