نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار پژوهش، بخش تحقیقات فنی و مهندسی کشاورزی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات، آموزش
2 دانشیار پژوهش، بخش تحقیقات فنی و مهندسی کشاورزی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات، آموزش
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Tragacanth gum is considered as one of the valuable export products of natural resources of Iran and Isfahan province. This product is used in the food and cosmetic industries as a stabilizing agent, viscosity increaser in food, pharmaceutical and cosmetic emulsions and formulas. In this research, the effect of grinding method, type of Tragacanth and the final size of crushed particles on the quality indicators of Tragacanth were evaluated. For this purpose, using a factorial experiment in the form of a completely random design, the effect of the grinding method in two levels, one-stage and two-stage, the type of Tragacanth in two levels of Ribbon and Flake and the final size of the particles of Tragacanth milled in three levels, 2, o.5 and 0.25 mm in three repetitions on gel color and viscosity indices were investigated as two very important factors in determining the quality of Tragacanth gum. The results showed that the effect of all three factors (type of Tragacanth, grinding steps and particle size) on viscosity values of Tragacanth gel and color parameters (R, G and B) were significant at 1% probability level. Viscosity of Ribbon 2680 centipoise and Flake between 510 centipoise was obtained, which shows the higher quality and more economic value of Ribbon type. In both types of Tragacanth, with the reduction of particle size to less than 2 mm, a higher viscosity reduction was observed, especially in the one-stage grinding method, The examination of the color indices of Tragacanth showed that based on the Euclidean distance (ΔE) obtained, the color difference of Ribbon and Flake type Tragacanth in terms of brightness is 11.67 units and the color difference between one and two stages of grinding is 8.85 units. According to the general results, the most suitable method of processing Tragacanth includes using a Ribbon Tragacanth, grinding in two stages and turning Tragacanth into particles with a size of 2 mm.
کلیدواژه‌ها [English]
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