共查询到20条相似文献,搜索用时 62 毫秒
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通过单因素试验和正交试验,研究了风味蛋白酶对菜籽蛋白中2S(RP-2S)和12S(RP-12S)的水解条件。结果表明,水解RP-2S的最佳酶解条件为底物浓度1%,酶与底物浓度比(E/S)95LAPU/g,酶解温度50℃,pH 7.0,酶解时间3 h,此条件下RP-2S的水解度达33.64%;水解RP-12S的最佳酶解条件为底物浓度1%,酶与底物浓度比(E/S)85 LAPU/g,酶解温度50℃,pH 6.6,酶解时间3 h,此条件下RP-12S的水解度达19.97%。 相似文献
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胰蛋白酶水解玉米胚芽蛋白的研究 总被引:2,自引:1,他引:2
研究了胰蛋白酶对玉米胚芽蛋白的水解作用,分析了酶浓度、pH、反应温度、底物浓度等因素对水解度的影响。结果表明:最佳水解条件为酶与底物比2%、温度40℃、pH8.0、底物浓度8%。在此条件下水解4 h,水解度可达10.4%。高效凝胶过滤色谱(HPSEC)分析酶解产物分子量分布发现,酶解产物的分子量主要集中在200~4 000 Da。 相似文献
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本文介绍咖啡渣酸水解制取D-甘露糖工艺中高酸低温间歇水解和低酸高温连续水解工艺对D-甘露糖收率的影响及两种工艺比较。 相似文献
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The aim of this study was to evaluate the production and the structural and physicochemical properties of RS obtained by molecular mass reduction (enzyme or acid) and hydrothermal treatment of chickpea starch. Native and gelatinized starch were submitted to acid (2 M HCl for 2.5 h) or enzymatic hydrolysis (pullulanase, 40 U/g per 10 h), autoclaved (121°C/30 min), stored under refrigeration (4°C/24 h), and lyophilized. The hydrolysis of starch increased the RS content from 16% to values between 20 and 32%, and the enzymatic treatment of the gelatinized starch was the most efficient. RS showed an increase in water absorption and water solubility indexes due to hydrolytic and thermal process. The processes for obtaining RS changed the crystallinity pattern from C to B. Hydrolysis treatments caused an increase in relative crystallinity due to the greater retrogradation caused by the reduction in MW. RS obtained from hydrolysis showed a reduction in viscosity, indicating the rupture of molecules. The viscosity seemed to be inversely proportional to the RS content in the sample. 相似文献
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