title: Crystalline and structural properties of acid-modified lotus rhizome C-type starch.
abstract: The crystalline and structural properties of acid-modified C-type starch from lotus rhizomes were investigated using a combination of techniques. The degradation of granule during hydrolysis began from the end distant from the hilum and then propagated into the center of granule, accompanied by loss of birefringence. The crystallinity changed from C-type to A-type via CA-type during hydrolysis. At the early stage of hydrolysis, the amylose content substantially reduced, the peak and conclusion gelatinization temperatures increased, and the enthalpy decreased. During hydrolysis, the double helix content gradually increased and the amorphous component decreased, the lamellar peak intensity firstly increased and then decreased accompanied by hydrolysis of amorphous and crystalline regions. This study elucidated that B-type allomorph was mainly arranged in the distal region of eccentric hilum, A-type allomorph was mainly located in the periphery of hilum end, and the center of granule was a mixed distribution of A- and B-type allomorphs.
authors: Key Laboratories of Crop Genetics and Physiology of the Jiangsu Province and Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China.
authors: Jinwen
authors: J
authors: Cai
authors: Key Laboratories of Crop Genetics and Physiology of the Jiangsu Province and Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China.
authors: Canhui
authors: C
authors: Cai
authors: Key Laboratories of Crop Genetics and Physiology of the Jiangsu Province and Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China.
authors: Jianmin
authors: J
authors: Man
authors: Key Laboratories of Crop Genetics and Physiology of the Jiangsu Province and Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China.
authors: Yang
authors: Y
authors: Yang
authors: Testing Center, Yangzhou University, Yangzhou 225009, China.
authors: Fengmin
authors: F
authors: Zhang
authors: Key Laboratories of Crop Genetics and Physiology of the Jiangsu Province and Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China. Electronic address: cxwei@yzu.edu.cn.
authors: Cunxu
authors: C
authors: Wei
mesh_terms: D000143:Acids / Q000737:chemistry*; D003460:Crystallization; D018360:Crystallography, X-Ray; D006868:Hydrolysis; D000070116:Lotus / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D027343:Rhizome / Q000737:chemistry*; D053838:Scattering, Small Angle; D013213:Starch / Q000737:chemistry*
chemical_list: D000143:Acids; D013213:Starch
keywords: Acid hydrolysis; C-type starch; Crystalline property; Lotus rhizome; Structural property