The Crystalline Changes of Starch from Rhizoma Dioscorea by Acid Hydrolysis  

作　　者：Shu Jun WANG Wen Yuan GAO Jing Lin YU Pei Gen XIAO 

机构地区：[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

出　　处：《Chinese Chemical Letters》2006年第9期1255-1258,共4页中国化学快报（英文版）

摘　　要：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.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.

关 键 词：Rhizoma Dioscorea STARCH CRYSTALLINE acid hydrolysis X-ray diffraction. 

分 类 号：R284.2[医药卫生—中药学]