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Bamboo is a popular tradition of our people's favorite food, good nutrition and health care. Head shoots are rich in dietary fiber, but its thickness, woody fiber content, structure rough, processing quality is limited, the body is difficult to absorb [2]. Many studies have shown that water-soluble components of dietary fiber nutrition plays a key role in [3]. In this paper, bamboo head through the degradation of dietary fiber, to obtain high-quality dietary fiber, and the degradation of system analysis method shoots head Functional Properties of Dietary Fiber, research content and results are as follows: 1, the first shoots of dietary fiber degradation This topic using enzymatic hydrolysis broken handle, squeeze - ultra-fine processing, complex enzyme - squeeze - ultrafine shoots three methods combined treatment head fiber degradation, mainly in the soluble dietary fiber (SDF) as an indicator dissolution , supplemented by enzymatic breakage rate and ultrafine grinding flour yield indicators, three processes to optimize the test, and the degradation effect of three methods, the results are as follows: (1) enzyme mix and matching to determine : In the reaction temperature 50 ℃, enzyme dosage 0.8%, reaction time 5h, pH value of 5.5, liquid-solid ratio 4:1 conditions, determine the optimum combination of enzyme cellulase, hemicellulase, xylan sugar, enzymes, according to the ratio of 3:2:1 complex, shoots head broken rate of 51%; (2) enzyme degradation to determine optimum conditions: the single factor test, based on the determined by orthogonal test enzyme The optimum conditions for the degradation: hydrolysis temperature 60 ℃, enzyme dosage 0.7%, hydrolysis time 4h, pH value of 6.0, liquid-solid ratio 4:1, shoots head broken rate reached 59%, SDF elution rate of 4.35g / 100g; (3) squeeze - ultrafine degradation process conditions to determine: Studies on the extrusion process conditions using quadratic orthogonal rotation combination experiment design, the establishment of the first shoots of soluble dietary fiber dissolution Y and screw speed X1, barrel temperature X2, X3 working pressure mathematical regression model, the confidence level of 99%. Through single factor analysis to determine the optimal process conditions: screw speed 220r/min, barrel temperature 160 ℃, working pressure 6.5MPa, SDF elution volume reached 4.52 g/100g; Then the optimal extrusion process conditions treated bamboo heads further dietary fiber powder ultrafine grinding to grinding time, moisture content, feed rate as factors to determine the optimum process conditions: grinding time 6min, water content of 6.0%, feed rate 40g, soluble dietary fiber content from squeeze pressure treated 4.52g/100g increased to 5.45g/100g, through 200 mesh sieve, ultrafine grinding flour reached 84.3%. (4) enzyme - squeeze - ultrafine combined degradation process conditions to determine: the optimum conditions for the enzyme (reaction temperature 60 ℃, enzyme dosage 0.7%, hydrolysis time 4h, pH value of 6.0, liquid-solid ratio 4 : a) the treated samples were extruded - ultra-fine processing, the combination process optimum conditions for the extrusion screw speed 230r/min, barrel temperature 160 ℃, working pressure 6.5Mpa; ultrafine grinding optimal conditions for the grinding time of 6 minutes, feeding quantity 45g. Thus combined degradation process conditions obtained shoots head dietary fiber (SDF) dissolution reached 8.56 g/100g, flour rate of 96.5%. 2, degradation of processed bamboo shoots first evaluation of functional properties of dietary fiber in three Degradation of the subject head on bamboo fiber is processed, the system analyzes the various treatment methods shoots head dietary fiber expansion force, water holding capacity, oil holding force, viscosity effects, the results show that the use of composite enzyme - squeeze - ultrafine degradation relative to the other two combined degradation method can better improve processing quality bamboo fiber head, enhance its functional properties, so that the obtained powder shoots head dietary fiber expansion force reach 7.757ml / g, water holding 5.24g / g, oil holding force 3.287g / g, viscosity 8.633mPa · S.
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