Chemical modification with octenyl succinic anhydride (OSA) helps to control the physicochemical and thermal properties of isolated starches. The main objective, herein, was to partially characterize modified starches from Dominico-Harton plantain and FHIA 21 planted in Colombia. The highest degree of substitution was found in FHIA 21 (0.020) starch with 3% OSA and 4-h reaction at room temperature. The grain morphology was not affected, but small changes on the surface were evident. Both modified starches reported absorption bands in the IR at 1566 and 1738 cm-1, proper for these types of starch derivatives. The hexagonal and monoclinic structures of starch were altered through chemical modification. In the bending curves, a drastic decrease in the viscosity of the modified starches was observed with respect to the native one. The gelatinization temperatures of the modified starches were similar to those of the isolated starches.

中文翻译：

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从两个未成熟的车前草中提取淀粉，并用辛烯基琥珀酸酐（OSA）酯化：部分表征。

用辛烯基琥珀酸酐（OSA）进行化学修饰有助于控制分离淀粉的物理化学和热学性质。本文的主要目的是部分表征来自哥伦比亚种植的Dominico-Harton车前草和FHIA 21的改性淀粉。发现最高取代度是在FHIA 21（0.020）淀粉中，OSA为3％，室温下反应4小时。晶粒形态没有受到影响，但是表面上的微小变化是明显的。两种改性淀粉均报告了红外光谱在1566和1738 cm-1处的吸收带，适用于这些类型的淀粉衍生物。淀粉的六方和单斜晶结构通过化学修饰而改变。在弯曲曲线中，相对于天然淀粉，观察到改性淀粉的粘度急剧降低。