脚板薯淀粉理化特性研究

采用碱法工艺提取脚板薯淀粉,并对其组成、透明度、冻融稳定性、凝沉性、持水性、溶解度、膨胀度、糊化和黏度特性等理化性质进行了分析。结果表明:脚板薯直链淀粉含量为27.05%,淀粉透明度、凝沉性、持水力、热稳定性较好,但冻融稳定性差,不易糊化,脚板薯淀粉的溶解力和膨润力随着温度的升高而增大,与水之间的相互作用较强。

Study on physicochemical properties of the starch fiom Dioscorea alata L.

Alkaline process was used to extract the starch from Dioscorea alata L., and the composition, transparency, freeze-thaw stability, settling property, water holding capacity, solubility, swelling, gelatinization and viscosity characteristics of the extracted starch were analyzed. The results showed that the content of amylose in legume Dioscorea alata L. was 27.05%. Compared with the starch from wheat, mung bean, and potato, the transparency, settling ability, water retention, and thermal stability of legume potatoes were found best. However, the freeze-thaw stability was poor, and it was difficult to gelatinize. The dissolving power and swelling power of the starch from legume potato increased with temperature, showing stronger interaction with water.