title: Resistant starch improvement of rice starches under a combination of acid and heat-moisture treatments.
abstract: The effects of a combination of acid and heat-moisture treatment on formation of resistant starch (RS) and characteristics of high-amylose, normal and waxy rice starches were investigated in this study. The degrees of polymerization of the rice starches treated with citric acid, lactic acid or acetic acid were significantly reduced as compared to the native starches. The RS contents of acid and heat-moisture treated rice starches were in a range of 30.1-39.0%, significantly higher than those of native rice starches (6.3-10.2%) and those of heat-moisture treated rice starches (18.5-23.9%). The acid and heat-moisture treatments reduced swelling power and viscosity, but increased solubility of the starches, while the crystalline structure did not change. Among the organic acids used, citric acid had the most impact on starch characteristics and RS formation, followed by lactic acid and acetic acid. The results are useful in production of RS for functional food application.
authors.affiliation: School of Biotechnology, International University, Vietnam National University in HoChiMinh City, Quarter 6, Linh trung Ward, Thu Duc District, HoChiMinh City, Viet Nam. Electronic address: pvhung@hcmiu.edu.vn.
authors.forename: Pham Van
authors.initials: PV
authors.lastname: Hung
authors.affiliation: School of Biotechnology, International University, Vietnam National University in HoChiMinh City, Quarter 6, Linh trung Ward, Thu Duc District, HoChiMinh City, Viet Nam.
authors.forename: Ngo Lam
authors.initials: NL
authors.lastname: Vien
authors.affiliation: Faculty of Chemical Engineering, University of Technology, Vietnam National University in HoChiMinh City, 268 Ly Thuong Kiet Street, District 10, HoChiMinh City, Viet Nam.
authors.forename: Nguyen Thi
authors.initials: NT
authors.lastname: Lan Phi
mesh_terms: D019342:Acetic Acid / Q000737:chemistry*; D000688:Amylose / Q000737:chemistry; D019343:Citric Acid / Q000737:chemistry*; D006358:Hot Temperature; D006813:Humidity; D019344:Lactic Acid / Q000737:chemistry*; D012275:Oryza / Q000737:chemistry*; D012995:Solubility; D013213:Starch / Q000737:chemistry; D014783:Viscosity
chemical_list: D019343:Citric Acid; D019344:Lactic Acid; D013213:Starch; D000688:Amylose; D019342:Acetic Acid
keywords: Acid hydrolysis; Heat-moisture treatment; Physicochemical properties; Resistant starch; Rice starch