Study On Preparation Process And Using Of Corn Zein Mimics

Excessive dietary fat intake is associated with increasing risk of obesity, high blood cholesterol,coronary heart disease and some types of cancer. Foods formulated with fat substitutes are an enjoyablealternative than familiar high-fat foods. At present fat substitutes are fashionable all over the world. Cornprotein mimics own the taste and texture of the grease. But it is low-energy foodstuff. It could take placethe grease in a part of the foodstuff, the success greatly increase the extra-value of the corn, which open upa brilliant prospect.The mimics is a production made from the carbohydrate or the protein as the fundamental material. Itcould supply the unlipidic material, which could act for the sap or and texture of the fat in the foodstuff.But they couldn't take place the fat completely. The calories they supplied is 0～4 Kcal/g, and they couldabsorb sufficient water. The emulsify system which packed the oil with water(O/W),could take place thelardaceous liquid system. They would be better than the fat substitutes with fatty acid in foodstuff safety.But it couldn't be dealt with in high-temperature and dissolved in dipodic sap or substance such as decoting,fring, toasting and baking over a slow fire.The experiment take the extracted corn zein as material, after adjusting pH value,wet-heat disposal,,adding micropaticle and emulsify and so on, a series of disposals, made whit and light yellow slimy liquidor semisolid ,whose diameter is only0.1～3μm.The mimics own grease odor, texture and character of the fat,and applied producing ice cream and yolk sauce. If the people could combine the production withbalanceable meal, they could gain the goal of balanceable meal, and precaution the adiposity, diabetes andhypertensive due to the high-energy foods.The thesis's content is the emphasis project, which tackled key problem in science and educationaloffice in Jillian province; mainly reaches on prepared technique of corn zein mimics experiment andreaches on applying, the mimics is made by the corn protein, which is the by product in theproductive process of corn facular, and acquires findings as follows:1,Defining the optimal process condition of the supercritical CO₂ extraction of corn protein powder:the extraction temperature is 40℃, the extraction pressure is 30Mpa, the extraction time is 100min,CO₂discharge is 30L/h.2,Through orthogonal test and results of determining item analyse, the optimal condition ofextracting corn zein was determined: ethanol is75%, ratio of solid to liquid is 1:5, temperature is60℃, pHis 8.0,the pure degree in protein which was most reasonable. 3,With staple of zein prepared mimics, the optimal condition was determined, which islisted as the following: pH is 6.0,temperature is 40℃,shearing time is 6min,shearing rate is13000rpm,the proportion of emulsifying stabilizer is that monoglyceride:gumxanthan:CMC-Na is 0.1%:0.5%:0.1%.It would be better if the product could be semiconductand tasting tenderly just like the crude fat.4,Defining the orthogonal test of amounts of mimics substitutes for cream, result oforthogonal was determined the optimal formula is amounts of cream is 1%,amounts ofmimics is 5%,amounts of emulsified is 0.5%,amounts of stabilizer is 0.5%.5,Defining the orthogonal test of amounts of mimics substitutes for oil, result oforthogonal was determined the optimal formula is amounts of mimics is 16%, amounts of oilis 0%, amounts of vinegar is 2%,amounts of yolk is 7%.