大豆蛋白酶水解产物的水解度对小麦粉及面条品质的影响

探讨了不同水解度的大豆蛋白酶水解产物对小麦粉及面条品质的影响,结果表明,添加不同水解度的酶水解产物后,小麦粉糊化特性的峰值黏度、最终黏度和最低黏度均比原小麦粉明显降低;除水解度为4.19%的水解产物外,添加其他水解度的酶水解产物的面团稳定时间均有所降低,弱化度增大;与原面粉面条相比,添加大豆蛋白酶水解产物后,面条的粘附性明显降低;添加不同酶水解产物的面条质构特性无显著性差异,添加水解度4.19%和7.45%酶水解产物的面条的拉伸特性与原小麦粉面条无显著性差异;当水解度超过5.34%后,面条的干物质损失率和蛋白质损失率明显增大。综合评价小麦粉和面条的品质指标,作为面条用粉时,添加的大豆蛋白酶水解产物的水解度4.19%为宜。

Effects of DH of Soy Protein Hydrolyzates on the Qualities of Wheat Flour and Noodles

Effects of hydrolysis degree (DH) of soy protein hydrolyzates on properties of wheat flour and texture properties of noodles were discussed. Results showed that peak viscosity, final viscosity and trough viscosity of flour added soy protein hydrolyzates (FSPH) were significantly lower than wheat flour (control, WF). FSPH-dough stability decreased and softening degree increased except the FSPH-DH 4.19%. Compared with WF-noodles, the adhensiveness of FSPH-noodles reduced. There was no significant difference between the texture properties of FSPH-noodles. No significant difference was found between the tensile properties of WF-noodles and the FSPH-noodles adding DH 4.19% or 7.45% hydrolyzates; When DH of soy protein hydrolyzates was more than 5.43%, dry material loss and protein loss of FSPH-noodles increased obviously. Comprehensive evaluating the qualities of flour and noodles, the suitable DH of soy protein hydrolyzates added to wheat flour to prepare noodles is 4.19%.