Study Of Naked Oat Amazake, Caramel And The Extraction, Modification Of Dietary Fiber In Naked Oat

Naked oat crop is a specialty of Inner Mongolia, with high production value. It is rich in many nutrients with balanced ratio, which considered as good raw material. In this paper, the comprehensive processing and utilization of naked oat was studied in two aspects. On the one hand, the primary processing of naked oats amazake and naked oat caramel was investigated. On the other hand, the further processing of extraction and modification of naked oat bran dietary fiber was studied. The main conclusions were as follows:(1) Optimum conditions were confirmed through single factor experiments and orthogonal tests. The results showed that the optimal technology parameter of naked oats amazake was fermentation temperature28℃, fermentation time48h, starter inoculum1.5%.(2) Optimum conditions were confirmed through single factor experiments and orthogonal tests. The results showed that the optimal technology parameter of naked oats potato caramel condition was: ratio of starch4:10, high maltose syrup dosage10g, sugar30g, water45ml.(3) Though orthogonal tests we found that the optimum extraction condition of naked oat bran SDF enzymatic method was as follow: extractingtemperature60℃, extraction time90min and the ratio of material to water1:12. Under this condition, the extraction extracting rate of SDF was3%.(4) The optimum modification condition of naked oat bran IDF acid modified was as follow: pH4, acid hydrolysist emperature50℃, acid hydrolysis time150min and the ratio of solid to liquid1:20. Under these conditions, the modification extracting rate of SDF was11.07%.(5) The optimum modification condition of naked oat bran IDF alkaline modified was as follow: pH14, alkaline hydrolysis temperature90℃, alkaline hydrolysis time120min and the ratio of material to water1:60. Under these conditions, the modification extracting rate of SDF was51.17%.(6) The optimum modification conditions of naked oat bran IDF enzymatic modified was as follow: enzymolysis temperature was55℃, enzyme pH was5, hydrolysis time was120min and the ratio of material to water was1:35. Under these conditions, the modification extracting rate of SDF was10.2%.(7) Based on single factor tests, the optimal process of enzyme-alkali modification was determined by using response surface methodology. During the stage of enzymatic modification, the optimal process was temperature54℃, time118.7min, the ratio of material to water1:39.56, pH4.58. Under this condition, the modification extracting rate of SDF was12.2%. In the part of lkali modification, the optimal process was temperature87.97℃, time105.53min, ratio of material to water1:46.75. Under certain conditions, the modification extracting rate of SDF was37%.(8) The water absorption capacity and the oil absorption capacity of each method were determined. The results showed that: the IDF after enzymatic modification had maximum capacity in all methods, IDF after enzyme-alkali modification showed less tendency of decrease, chemical modification performed worst.(9) To sum up, enzyme-alkali method which can achieve better modification extracting rate of SDF and better water absorption capacity, oil absorption capacity, was a kind of suitable method for production.