Relationship between molecular structure and lamellar and crystalline structure of rice starch

文献类型： 外文期刊

第一作者： Zhong, Yuyue

作者： Zhong, Yuyue;Li, Zhihang;Liu, Xingxun;Li, Zhihang;Li, Ming;Zhong, Yuyue;Blennow, Andreas;Qu, Jianzhou;Bertoft, Eric;Zhu, Fan

作者机构：

关键词： Rice starch; Molecular structure; Crystalline structure; Lamellar structure; Correlation analysis

期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：9.381； 五年影响因子：8.678 ）

ISSN： 0144-8617

年卷期： 2021 年 258 卷

页码：

收录情况： SCI

摘要： The relationship between molecular structure and crystalline and lamellar structures of fifteen types of rice starches was studied. GPC and HPAEC were used for the molecular chain analysis and WAXS, SAXS, and CP/MAS C-13 NMR were employed for aggregation structural analysis. The amylopectin content and the average lengths of fb(1)-chains (the degree of polymerization (DP) 13-24) were positively correlated with the amount of double helices (r(2) = 0.92 and 0.57, respectively). In contrast, amylose content was positively correlated with the amounts of amorphous materials in starch (r(2) = 0.77). The amount of double helices, which constitute a major part of the crystalline matrix, was positively correlated with the lamellar ordering (r(2) = 0.81), and negatively correlated with the thickness of crystalline lamellae (r(2) = 0.90) and lamellar repeat distance (r(2) = 0.84). Conversely, the amount of the amorphous matrix was correlated with these parameters in the opposite way (r(2) = 0.50, 0.75, and 0.75, respectively).

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