title: Effect of debranching and heat-moisture treatments on structural characteristics and digestibility of sweet potato starch.
abstract: The effects of debranching treatment (DT) and debranching-heat-moisture treatment (D-HMT) on the structural characteristics and in vitro digestibility of sweet potato starch were investigated. The results indicated that DT and D-HMT decreased the percentage of starch fraction with degree of polymerization (DP) ⩽ 13, increased the percentages of the other fractions, and decreased the molecular weight of starch sample. The D-HMT starch showed a considerable SDS content of 31.60%. Compared with the DT starch sample, the T(o), T(p), T(c), T(c)-T(o) and ΔH of D-HMT starch samples for the second endothermal were increased significantly, crystalline pattern was altered from C(a) to A type, the surface became more smooth. The pasting temperatures of DT and D-HMT starch samples were higher while the peak viscosities, breakdown and setback values were lower than that of native starch. These results suggested that structural changes of sweet potato starch by D-HMT significantly affected the digestibility.
authors.affiliation: School of Biotechnology and Food Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China.
authors.forename: Ting-Ting
authors.initials: TT
authors.lastname: Huang
authors.affiliation: School of Biotechnology and Food Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China.
authors.forename: Da-Nian
authors.initials: DN
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, PR China.
authors.forename: Zheng-Yu
authors.initials: ZY
authors.lastname: Jin
authors.affiliation: State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, PR China.
authors.forename: Xue-Ming
authors.initials: XM
authors.lastname: Xu
authors.affiliation: School of Biotechnology and Food Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China. Electronic address: hanqchen@hfut.edu.cn.
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Chen
mesh_terms: D002236:Carbohydrate Conformation; D004063:Digestion; D006358:Hot Temperature; D006801:Humans; D027723:Ipomoea batatas / Q000737:chemistry / Q000378:metabolism*; D013213:Starch / Q000737:chemistry* / Q000378:metabolism; D014783:Viscosity
chemical_list: D013213:Starch
keywords: Debranching; Digestibility; Heat-moisture treatment; Slowly digestible starch; Structural characteristics; Sweet potato starch