title: Physicochemical properties and digestibility of hydrothermally treated waxy rice starch.
abstract: Waxy rice starch was subjected to annealing (ANN) and heat-moisture treatment (HMT). These starches were also treated by a combination of ANN and HMT. The impact of single and dual modifications (ANN-HMT and HMT-ANN) on the molecular weight (M(w)), crystalline structure, thermal properties, and the digestibility were investigated. The relative crystallinity and short-range order on the granule surface increased on ANN, whereas decreased on HMT. All treated starches showed lower M(w) than that of the native starch. Gelatinization onset temperature, peak temperature and conclusion temperature increased for both single and dual treatments. Increased slowly digestible starch content was found on HMT and ANN-HMT. However, resistant starch levels decreased in all treated starches as compared with native starch. The results would imply that hydrothermal treatment induced structural changes in waxy rice starch significantly affected its digestibility.
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Zeng
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Ma
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China; College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China.
authors.forename: Fansheng
authors.initials: F
authors.lastname: Kong
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Qunyu
authors.initials: Q
authors.lastname: Gao
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China; State Key Laboratory of Pulp and Paper Engineering, Guangzhou 510640, China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510640, China. Electronic address: shujuanyu8@gmail.com.
authors.forename: Shujuan
authors.initials: S
authors.lastname: Yu
mesh_terms: D055598:Chemical Phenomena; D004063:Digestion; D012275:Oryza / Q000737:chemistry*; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000737:chemistry*; D013696:Temperature
chemical_list: D013213:Starch
keywords: Annealing; Heat-moisture treatment; Resistant starch; Slowly digestible starch; Weight-average molar mass