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18th Global Summit on Food & Beverages

Chicago, USA

Junrong Huang

Junrong Huang

Shaanxi University of Science and Technology, China

Title: The hierarchical structure and properties of starches
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Biography: Junrong Huang


Starch is a polymeric carbohydrate, contained in large amounts in staple foods. In industry, it is converted into sugars or used as a thickening, stiffening or gluing agent. The two major macromolecular components of starch are amylose and amylopectin. With a molecular weight ranging from 50–500×106, amylopectin is one of the largest natural polymers known. Similar to protein, starch is a hierarchical material and can be divided into four levels of structure: molecule, blocklet, shell and granule. The molecule structure is related to the digestive and rheological properties of starch. The shell, especially the outer shell structure, is a key factor in determining the swelling and pasting properties during starch gelatinization. The granule structure is related to the crystalline and thermal properties of starch. The blocklet is the building block of the shell and the granule, however, little is known about its relationship with the properties of starch. A method to slow down or interrupt the gelatinization process of starch was established. By applying the method, a new phenomenon was observed for the gelatinization process of starch at the blocklet level: the blocklets were released from the granules; swelled; deformed to olive shape, and formed bead-like structure; then fused together with completely disappearing of the shape, and formed the gel network in the end.

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