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The use of Ultrasound in food industry is the main issue in research and development .Regarding to the wide application of modified starches in food industry and their associated hazards, the aim of this study was to investigate the possibility of modifying physicochemical properties of wheat starch by ultrasound treatment, so 6 samples of 10% wheat starch suspension was prepared and treated by 200 and 400 W ultrasound probe and also ultrasound bath for 15 and 30 minutes. Solubility, Swelling power, Oil absorption, Turbidity and SEM tests was performed to assess the physicochemical changes of ultrasound treated starches. According to the obtained results, the highest solubility and oil absorption and the lowest swelling power was related to the samples treated by 200W ultrasound probe. .  This sample also showed the most transparency after 15 min treatment and did not have any significant difference with control sample. Scanning  electron microscopy images of samples also showed complete disintegration of the granular structure of the samples treated by 200 w ultrasound probe for 15 and 30 minutes while the structure of other samples were changed a little.  

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To investigate the effect of edible coatings in retarding of bagutte bread staling, three types of coating formulations containing Sodium alginate, carboxymethyl cellulose and xanthan as hydrocolloids and sunflower oil, glycerol, water, starch and potassium sorbate were used for coating of baguette bread and The effect  of these coatings on retarding of staling after 1,2 and 3 days of storage was investigated. The obtained results revealed that after 1 day of storage the mentioned coatings presented bread with similar freshness to that of control [ fresh sample]. After 2 days of storage, sodium alginate and xanthan coated samples acted similar in retarding of staling and after 3 days of storage, all the coatings did not have any significant difference with each other and also with control sample from staling point of view.