Commercial starches with different amylose (AM)/amylopectin (AP)‐ratios (waxy potato: WxPS, regular potato: PS, high AM corn: HACS) are hydroxypropylated (HP, pilot plant scale, two levels) and subsequently acid‐thinned (AT, laboratory scale) to produce dual‐modified samples. The gradation of the molar substitution (MS) obtained is significant for each starch basis. Investigation by means of scanning electron microscopy reveals a basically intact granular structure with surface defects. The molecular properties are comprehensively characterized using size exclusion chromatography‐multi angle laser light scattering‐differential refractive index detection (SEC‐MALS‐DRI) and corresponding conventional calibration (SEC‐cal‐DRI). The evaluation of the molecular data (MS and weight average molar mass, M_w) by means of statistical analysis (ANOVA) identifies statistically significant impacts with respect to the starch type, the substitution level, and the AT treatment.

中文翻译：

---

使用羟丙基化和随后的酸稀化的双重方法修饰具有不同直链淀粉/支链淀粉比率的淀粉-对形态和分子特征的影响

将具有不同直链淀粉（AM）/支链淀粉（AP）比率的商业淀粉（糯马铃薯：WxPS，普通马铃薯：PS，高AM玉米：HACS）进行羟丙基化（HP，中试规模，两级），然后进行酸稀释（ AT，实验室规模）以生成双重修改的样本。对于每种淀粉基础而言，获得的摩尔取代度（MS）的等级都很重要。通过扫描电子显微镜的研究发现具有表面缺陷的基本完整的颗粒结构。使用尺寸排阻色谱-多角度激光散射-示差折光检测（SEC-MALS-DRI）和相应的常规校准（SEC-cal-DRI）全面表征分子特性。评估分子数据（MS和重均摩尔质量，M _w）通过统计分析（ANOVA）识别出在淀粉类型，取代水平和AT处理方面的统计学显着影响。