Shahi, N.C.Patel, Satyendra Kumar2018-08-252018-08-252017-08http://krishikosh.egranth.ac.in/handle/1/5810069578Flaxseed oil is an important vegetable oil which is the richest source of omega-3 fatty acids. It has high nutritional value which makes it most healthy and beneficial oil. It plays an important role in improving eye health, buildup of brain and nervous system in infants, reducing the possibility of hypercholesterol, hypertension, cancer and coronary heart diseases. But due to presence of large amount of polyunsaturated fatty acids it is prone to oxidation and develops rancidity soon. Therefore present research was taken with the aim to extract the oil using ultra-sound technique and increase its oxidative stability by blending much oxidative stable sesame oil in it in appropriate proportion. For the extraction of oil, experiments were conducted using Box-Behnken design with three independent variables at three levels. Variables selected for the experiment were particle size, ultra-sonication time and solvent to solid ratio. Responses selected were oil recovery (%), peroxide value (meq/kg), acid value (mg KOH/g) and iodine value (mg I2/g oil). For the experiment of storage stability of flaxseed oil sesame oil used was 0.25, 0.50 and 0.75 g of oil per gram of flaxseed oil. The results shows that oil recovery varied from 65.18% to 89.16%. Quality parameters were within the recommended range with peroxide value, acid value and iodine value ranging from 3.24-5.67 meq/kg, 0.54-1.1 mg KOH/g and 176.48-181.89 mg I2/g respectively. The storage stability of flaxseed oil ranged from 20-45 days for all experimental conditions. It was found that particle size, ultra-sonication time and solvent to solid ratio had significant (p< 0.01) effect on oil recovery. Peroxide value and iodine value were affected by only ultra-sonication time whereas acid value was affected by both ultrasonication time and solvent to solid ratio. Further, storage stability of oil was affected by both, sesame oil blend ratio and ultra-sonication time. The results were optimized using RSM. Optimum levels of variables for oil extraction were 300µ particle size, 18.56 min sonication time, 7 ml/g solvent with responses value 76.12%, 3.40 meq/kg, 0.54 mg KOH/g and 181.67 I2/100g of oil recovery, peroxide value, acid value and iodine value respectively. Optimum levels of variables for storage stability were 696µ particle size, 11.75 min sonication time, 3.85 ml/g solvent, 0.72 g/g oil blend ratio with response value of 46 days of storage stability.ennullThesis