Development Of Jujube-walnut-crisp And Walnut Nutrient Oil

Walnut belongs to walnut family.As a kind of nutritious nourishing food,walnut has many kinds of biological activities.At present,the products about walnut mainly include original walnut,walnut powder,walnut oil,walnut milk,amber peach kernel,jujube sandwich walnut and other snack foods.In this paper,walnuts were used as the main research object to develop jujube-walnut-crisp snack foods by vacuum freezedrying technology,it supplemented jujube,lotus root starch,red bean paste and so on.And formulation is optimized by fuzzy mathematical sensory evaluation.Walnut oil,flaxseed oil and soybean oil were used as raw materials to develop walnut nutrient oil with balanced nutrition and high stability by mathematical model blending and response surface optimization.The results are as follows:1.The fuzzy mathematics sensory evaluation was used to optimize the jujube-walnut-crisp formula.The results showed that the sensory score of jujube-walnut-crisp liquid material was the highest when the content of lotus root powder was 3%,the content of red bean paste was 30%,and the content of brown sugar was 3%.When the wet jujube grain 4 g,walnut 1.5 g,wolfberry 2,liquid material 18 m L in each mold sample,the jujube walnut has the highest sensory level.At this moment,jujube-walnut-crisp has the unique aroma of the ingredients,crisp and delicious,suitable sweetness,and the product is relatively complete with no damage.2.The response surface was used to optimize the freeze-drying process of jujube-walnut-crisp.Study the influence of different factors on the freeze-drying rate.The results showed that the freeze drying rate is(4.11±0.07)%/h when the material filling thickness was 15 mm,the primary drying temperature was 55°C,and the secondary drying temperature was 60°C.At this moment,the product tastes crisp,and the surface is flat with no foaming and boiling.3.Walnut oil,flaxseed oil and soybean oil were used as raw materials to develop walnut nutrient oil with balanced nutrition and high stability by mathematical model blending and response surface optimization.The results showed that the stability of walnut nutrient oil was higher when the content of walnut oil was 36 g,the content of linseed oil was 7 g,and the content of soybean oil was 64 g.And walnut nutrient oil is rich in unsaturated fatty acids,and the ratio of ?-6 to ?-3 PUFA is 4.9:1,which satisfies the recommended ratio range of the Nutrition Society of China.