title: Structural properties and digestibility of pulsed electric field treated waxy rice starch.
abstract: Waxy rice starch was subjected to pulsed electric field (PEF) treatment at intensity of 30, 40 and 50kVcm(-1). The impact of PEF treatment on the granular morphology, molecular weight, semi-crystalline structure, thermal properties, and digestibility were investigated. The micrographs suggested that electric energy could act on the granule structure of starch granule, especially at high intensity of 50kVcm(-1). Gelatinization onset temperature, peak temperature, conclusion temperature and enthalpy value of PEF treated starches were lower than that of native starch. The 9nm lamellar peak of PEF treated starches decreased as revealed by small angle X-ray scattering. The relative crystallinity of treated starches decreased as the increase of electric field intensity. Increased rapidly digestible starch level and decreased slowly digestible starch level was found on PEF treated starches. These results would imply that PEF 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: Qun-Yu
authors.initials: QY
authors.lastname: Gao
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Han
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Xin-An
authors.initials: XA
authors.lastname: Zeng
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: Shu-Juan
authors.initials: SJ
authors.lastname: Yu
mesh_terms: D000687:Amylopectin / Q000737:chemistry / Q000378:metabolism; D004063:Digestion; D004560:Electricity; D006801:Humans; D012275:Oryza / Q000737:chemistry* / Q000378:metabolism; D013213:Starch / Q000737:chemistry* / Q000378:metabolism; D013696:Temperature; D013816:Thermodynamics
chemical_list: D013213:Starch; D000687:Amylopectin
keywords: Molecular weight; Pulsed electric field; Semi-crystalline structure; Slowly digestible starch; Small angle X-ray scattering