title: Effect of dry heating with ionic gums on physicochemical properties of starch.
abstract: Corn starch, potato starch, pea starch were impregnated with ionic gums (sodium alginate, CMC, and xanthan, 1% based on starch solids) and heat-treated in a dry state for 0, 2, or 4 h at 130°C. Effects of the dry heating on paste viscosity (RVA), microstructure and thermal properties were examined. Dry heat treatment with ionic gums reduced the pasting temperature of the three starches. Heating with xanthan increased the paste viscosity of corn and potato starch. With heat treatment, the paste viscosity of all the starch-sodium alginate mixtures decreased. Heating with CMC increased the paste viscosity of potato starch, but decreased that of corn and pea starch. After dry-heating, To, Tp and Tc of potato starch with ionic gums decreased significantly. SEM of potato starch with CMC showed that the gel structure got compacter after drying-heating. Heat treatment obviously improved the functional properties of the three starches.
authors.affiliation: School of Food Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong Province 266109, China. phdsun@163.com
authors.forename: Qingjie
authors.initials: Q
authors.lastname: Sun
authors.forename: Fumei
authors.initials: F
authors.lastname: Si
authors.forename: Liu
authors.initials: L
authors.lastname: Xiong
authors.forename: Lijun
authors.initials: L
authors.lastname: Chu
mesh_terms: D000464:Alginates / Q000737:chemistry; D055598:Chemical Phenomena; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006358:Hot Temperature; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*; D011135:Polysaccharides, Bacterial / Q000737:chemistry; D011198:Solanum tuberosum / Q000737:chemistry; D013213:Starch / Q000737:chemistry*; D014783:Viscosity; D003313:Zea mays / Q000737:chemistry
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D010936:Plant Extracts; D011135:Polysaccharides, Bacterial; D020723:Glucuronic Acid; D013213:Starch; C002563:xanthan gum