Details of the crystalline ultrastructure of C-starch granules revealed by synchrotron microfocus mapping

被引:98
作者
Buleon, A
Gerard, C
Riekel, C
Vuong, R
Chanzy, H
机构
[1] INRA, F-44316 Nantes 3, France
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[3] Univ Grenoble 1, CNRS, Ctr Rech Macromol Vegetales, F-38041 Grenoble 9, France
关键词
D O I
10.1021/ma980739h
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A microfocus synchrotron wide-angle diffraction mapping experiment was used to analyze the crystalline microstructure and the polymorphism of a series of C-starch granules from smooth pea. In these specimens that globally contained 60% of A-phase and 40% of the B-allomorph, it was found that the two phases were present in each granule. The A-allomorph was located essentially in the outer part of the granules whereas the B-phase was found mostly at their center. In the A-component, the diffraction diagrams were always poorly oriented fiber patterns with the fiber axis systematically oriented toward the center of the granule. On the other hand, in the B-center, only powder diagrams could be observed whereas in middle zones of the granules, the B-component was much better oriented than the A-component.
引用
收藏
页码:6605 / 6610
页数:6
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