3种变性淀粉的糊化特性及其在长保质期酸乳中的应用

Gelatinization Properties and Application of Three Modified Starches in Long Shelf-Life Yogurt

研究3种变性淀粉(物理变性淀粉(physical modified starch,PMS)、乙酰化二淀粉磷酸酯(acetylated distarch phosphate,ADSP)、羟丙基二淀粉磷酸酯(hydroxypropyl distarch phosphate,HDSP))的糊化特性及其在长保质期酸乳中的应用。结果表明:3种淀粉糊化后都保持着颗粒状态,具有较强的耐剪切性,其中ADSP和HDSP比PMS更耐剪切,具有更高的糊化温度,更难糊化。添加3种质量分数2%的变性淀粉均能够显著提高酸乳的黏度和持水力,增强其黏弹性和屈服应力,提高酸乳的贮藏稳定性。ADSP在改善酸乳品质上明显优于HDSP和PMS。

This study investigated the gelatinization properties of three types of modified starch and their application in long shelf-life yogurt. The three types of modified starch were physically modified starch （PMS）, acetylated distarch phosphate （ADSP）, hydroxypropyl distarch phosphate （HDSP）. The results showed that the granular structure of the three kinds of starch remained intact after gelatinization. They all had strong shear resistance, and ADSP and HDSP showed stronger shear resistance and higher gelatinization temperature than PMS. Adding 2% （m/m） modified starch in long shelf-life yogurt increased its apparent viscosity, water holding capacity, viscoelasticity, yield stress, and storage stability. ADSP was better to improve the quality of long shelf-life yogurt than HDSP and PMS.