Use of emulsifiers increased the pasting temperature of wheat
flour with and without stevioside and 100% SO (Fig. 1) indicating complex forming ability of emulsifiers with starch in the presence of SO. The peak viscosity of wheat flour representing highest viscosity attained by the paste during the gelatinization process with 100% SO was 730 BU (sample no. 6) and it increased (sample no. 14) with PS-60 (741 BU) while GMS and SSL (sample nos. 12 and 13) decreased (p < 0.05) it to 541 and 711 BU respectively (Fig. 1). These results suggest that the emulsifier PS-60 in the presence of SO has increased the ability of starch granules to swell freely before their physical break down. With GMS and SSL, it may be assumed that the decrease in peak viscosity is caused by the complex formation of the emulsifiers with the linear starch components making the structure more rigid and stabilize the swollen granules against breakdown and decrease in viscosity (Collison, Cambell, & Elton, 1960; Schoch, 1969). The cold paste viscosity noticeably increased with SSL, from 627 to 1007 BU, marginally increased with PS-60 (738 BU) and decreased (p < 0.05) with GMS (585 BU). In the presence of 100% SO, the breakdown values decreased with emul- sifiers, indicating improved resistance of the gel to cooking and stirring. The setback values increased significantly with the addi- tion of SSL while PS-60 showed marginal increase and GMS showed marginal decrease.