بررسی اثر دمای خشک کن، تیمار حرارتی و غلظت محلول صمغ ورودی به خشک کن بر خواص عملکردی صمغ فارسی

This study aimed at investing effect of heating treatment, gum concentration and drying temperature on functional properties of farsi gum. For this purpose, solutions with 3, 3.5, 4 and 5% concentration of farsi gum were provided. These solutions were influenced by heat treatments at 65, 75 and 85 °c. Then, they were dried by spray dryer in 120,150, 165 and 180 °c. Results of the studies showed that farsi gum solutions viscosity is intensely depended on heat treatment and drying temperature, in such a way that viscosity decreases linearly as drying temperature and heat treatment increases. Thermal treatment, drying temperature and gum concentration had no significant effect (p<0.05) on the water absorption capacity of farsi gum, but by increasing the drying temperature and increasing of heat treatment, solubility increased. A decrease in drying temperature made improvement in the emulsion ability and emulsion stability of farsi gum but gum concentration had no significant effect on emulsifying properties of farsi gum. The results also showed gum concentration had no significant effect on functional properties which were measured.