邢台学院学报

以酸枣果渣为原料，采用碱法提取可溶性膳食纤维(soluble dietary fiber, SDF),酶法提取非可溶性膳食纤维(insoluble dietary fiber, IDF),在单因素基础上进行正交实验优化了提取工艺，并测定了SDF和IDF的持水力、持油力和膨胀力。结果表明：碱法提取酸枣果渣SDF的最佳工艺条件为NaOH浓度9%、提取温度50℃、提取时间30 min,料液比1∶20(g∶mL),在此条件下，酸枣果渣SDF的得率为37.21%。酶法提取酸枣果渣IDF的最佳工艺条件为木瓜蛋白酶浓度0.3%、料液比1∶40(g∶mL)、α-淀粉酶浓度1.5%,在此条件下得到IDF得率为62.81%。酸枣果渣SDF和IDF的持水力分别为2.12 g/g和3.90 g/g,持油力分别为8.32 g/g和8.14 g/g,膨胀力分别为1.31 mL/mL和4.25 mL/mL。

Using wild jujube pomace as raw material, soluble dietary fiber(SDF) was extracted by an alkaline method, while insoluble dietary fiber(IDF) was extracted by an enzymatic method. Based on single-factor experiments, orthogonal experiments were conducted to optimize the extraction processes. The water holding capacity, oil holding capacity, and swelling power of the SDF and IDF were also determined. The results indicate that the optimal process conditions for the alkaline extraction of soluble dietary fiber(SDF) from jujube pomace are as follows: NaOH concentration of 9%, extraction temperature of 50 ℃, extraction time of 30 minutes, and a material-to-liquid ratio of 1∶20 g/mL. Under these conditions, the yield of SDF from jujube pomace reaches 37.21%. The optimal process conditions for the enzymatic extraction of insoluble dietary fiber(IDF) from jujube pomace are as follows: papain concentration of 0.3%, material-to-liquid ratio of 1∶40, and α-amylase concentration of 1.5%. Under these conditions, the yield of IDF reaches 62.81%.The water holding capacities of SDF and IDF from wild jujube pomace were 2.12 g/g and 3.90 g/g, respectively; the oil holding capacities were 8.32 g/g and 8.14 g/g, respectively; and the swelling powers were 1.31 mL/mL and 4.25 mL/mL, respectively.