Effect of degree of octenyl succinic anhydride (OSA) substitution on the digestion of emulsions and the bioaccessibility of ß-carotene in OSA-modified-starch-stabilized-emulsions
Effect of degree of octenyl succinic anhydride (OSA) substitution on the digestion of emulsions and the bioaccessibility of ß-carotene in OSA-modified-starch-stabilized-emulsions
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DOI：
10.1016/j.foodhyd.2018.05.056
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发表时间：
2018-11-01
影响因子：
10.7
通讯作者：
Singh, Harjinder
中科院分区：
文献类型：
--
作者：
Lin, Quanquan;Liang, Rong;Singh, Harjinder
取代度（DS）是辛烯基琥珀酸酐（OSA）-改性淀粉的最重要的性质之一，就优化其在亲脂性生物活性组分的递送系统的应用中的功能而言。研究了取代度对OSA改性淀粉纳米乳体外消化行为和β-胡萝卜素生物可及性的影响。的颗粒大小和分布，微观结构，zeta电位，淀粉的水解，和脂肪分解的乳液消化过程中，以及β-胡萝卜素的生物可及性的变化进行了测定。所有的乳剂在口腔期保持稳定，并且在胃条件下孵育后其粒径显著增加，粒径增加的程度与DS呈负相关。在胃的条件下，具有较高DS值的OSA改性淀粉稳定的乳液具有较少的絮凝和聚结，这可能归因于支链淀粉链的更大的空间位阻和在更多OSA基团存在下的更大的负zeta电位的幅度。具有更高DS的OSA改性淀粉形成的更刚性和紧凑的表面结构提供了更好的保护以抵抗胃液中的生化条件。当DS从0.0158增加到0.0416时，β-胡萝卜素的生物可及性从8.01 +/- 0.88增加到20.39 +/-1.93%，这可能是由于在由具有较高DS值的OSA改性淀粉稳定的纳米乳液中淀粉消化程度较低和脂质消化程度较大。
The degree of substitution (DS) is one of the most important properties of octenyl succinic anhydride (OSA)-modified starch, in terms of optimizing its functionality in the application of delivery systems for lipophilic bioactive components. This study investigated the effect of the DS of OSA-modified starch on the in vitro digestion behavior and the ss-carotene bioaccessibility in nanoemulsions stabilized by OSA-modified starches. Changes in the particle size and distribution, microstructure, zeta-potential, hydrolysis of the starch, and lipolysis in the emulsions during digestion as well as the bioaccessibility of ss-carotene were determined. All the emulsions remained stable during the mouth stage and their particle size increased significantly after incubation under gastric conditions, with the extent of increase in the particle size being negatively correlated to the DS. Under gastric conditions, the emulsions stabilized by OSA-modified starches with higher DS values had less flocculation and coalescence, which could probably be attributed to the greater steric hindrance of branched amylopectin chains and the greater magnitudes of the negative zeta-potential in the presence of more OSA groups. The more rigid and compact surface structure formed by the OSA-modified starch with higher DS provide better protection against the biochemical conditions in the gastric fluid. When the DS increased from 0.0158 to 0.0416, the bioaccessibility of ss-carotene was enhanced from 8.01 +/- 0.88 to 20.39 +/- 1.93%, which may have been due to a lower extent of starch digestion and a greater extent of lipid digestion in nanoemulsions stabilized by OSA-modified starch with higher DS values.