Citation: Shu Jun WANG, Wen Yuan GAO, Jing Lin YU, Pei Gen XIAO. The Crystalline Changes of Starch from Rhizoma Dioscorea by Acid Hydrolysis[J]. Chinese Chemical Letters, ;2006, 17(9): 1255-1258. shu

The Crystalline Changes of Starch from Rhizoma Dioscorea by Acid Hydrolysis

1.
College of Pharmaceuticals and Biotechnology, Tianjin University, Tianjin 300072;
2.
School of Science, Tianjin University, Tianjin 300072;
3.
Institute of Medicinal Plant, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100094

Received Date: 24 February 2006

The changes in crystalline properties of starch from Rhizoma Dioscorea by acid hydrolysis was characterized by X-Ray diffractometry (XRD). The results revealed that the crystalline type of Rhizoma Dioscorea starch changed from C-type to A-type after 16 days of the acid hydrolysis. This phenomenon was different from that of other starches subjected to the acid hydrolysis. The results revealed that the B-polymorphs of C-type starch constituted the amorphous regions while the crystalline areas were mainly composed of A-polymorphs. The degree of crystallinity of the acid-thinned starch increased gradually with the time of acid hydrolysis.
- Rhizoma Dioscorea,
- starch,
- crystalline,
- acid hydrolysis,
- X-ray diffraction
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