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The interactions between wheat starch and Mesona chinensis polysaccharide: A study using solid-state NMR

Author:
Yuris, Anynda, Hindmarsh, Jason, Hardacre, Allan Keith, Goh, Kelvin Kim Tha, Matia-Merino, Lara
Source:
Food chemistry 2019 v.284 pp. 67-72
ISSN:
0308-8146
Subject:
Platostoma palustre, amylopectin, amylose, carbon, gels, nuclear magnetic resonance spectroscopy, wheat starch
Abstract:
The interaction between wheat starch and Mesona chinensis polysaccharide (MCP) was found to change the molecular mobility of the water and carbohydrate populations in starch-MCP gels, when measured using proton and carbon nuclear magnetic resonance relaxation methods. The starch and MCP mobilities appeared similar at a micron scale. However, at a distance of less than 5 nm could they be detected as having separate mobility states, indicating close interaction between the starch and MCP. The carbon-6 of the starch glucan monomer was observed to have the largest mobility change in the presence of MCP. Two mobility populations of carbon-6 were observed, possibly corresponding to the carbon-6 in the linear chains of both amylose and amylopectin, and another to the carbon-6 involved in the branching of amylopectin. The change in the mobility of one of the carbon-6 populations indicates an increase in molecular freedom of movement in the presence of MCP.
Agid:
6285179