期刊
FOOD HYDROCOLLOIDS
卷 31, 期 1, 页码 68-73出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2012.10.006
关键词
Wheat starch; A-type granule; B-type granule; Crystalline structure; Nanostructure; Fractal
资金
- National Natural Science Funds of China [31071503]
- National Key Technology RD Program [2012BAD33B04, 2012BAD34B07, 2012BAD37B01]
- Guangdong Natural Science Foundation [S2011010001677]
The supramolecular structure of the A-and B-type granules of wheat starch was compared. Polarized light microscopy, X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) were used to study the granular, crystalline, and short-range structures. The A-and B-type granules displayed a typical A-type crystalline structure with the degrees of crystallinity of 31.95% and 29.38% respectively. In addition, the B-type granules had some V-type crystallites. The nanostructure and fractals were characterized by small angle X-ray scattering (SAXS), which showed that the average thickness of the lamellae of the A-type granules was larger, while the B-type granules possessed a higher degree of ordering in the lamellar regions. A second order reflection was found in both A-and B-type granules, which was proposed due to the crystalline lamellae of the semicrystalline lamellae. The A-and B-type granules had mass and surface fractal structures respectively. (C) 2012 Elsevier Ltd. All rights reserved.
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