Studies On The Wall Materials Of Powdered Oil By Enzymatic Hydrolysates Of Soybean Residues And The Detection Methods Of Products

Using soybean residues as raw materials and applying modern high-tech food engineering technology, mainly enzymatic hydrolysis technology and microencap-sulation technology, the feasibility of microencapsulation of different oils used as a model into a mixture of maltodextrin and soluble enzymatic hydrolysates of soybean residues was investigated in this paper. Also, the process of enzymatic hydrolysis with protease and cellulose, the process of encapsulation with the hydrolysis products by spray drying and the properties of hydrolysates of soybean residues and microcapsule products were investigated. The main results were as follows:Dietary fiber in soybean residue was analyzed by four methods, such as crude fiber method, neutral detergent fiber method (NDF), acid detergent fiber method (ADF) and improved Southgate method. The results showed significant differences among these methods. The sequence of total fiber content from high to low was as follows: improved Southgate method> neutral detergent fiber method> acid detergent fiber method> crude fiber method. The soluble non-digestive polysaccharide (2.18%), insoluble non-digestive polysaccharide (38.23%), cellulose (27.44%), and lignin (2.89%) were determined by the improved Southgate method. The improved Southgate method performed good precision and accuracy and offered theoretical basis for later enzymatic hydrolysis procedure of soybean residues.Optimization of enzymatic hydrolysis of soybean residues by Protamex and Flavourzyme was studied. When Protamex and Flavourzyme concentration were both 0.1 %( enzyme-substrate ratio), study the effects of pH, reaction time, temperature and substrate concentration on the rate of protein extraction. The optimum hydrolysis conditions were determined by orthogonal design experiment with the following...