title: Effects of pulsed electric field treatments on some properties of tapioca starch.
abstract: Tapioca starch-water dispersions (8.0%, w/w) were subject to pulsed electric fields (PEF) at 30, 40 and 50 kV cm(-1), respectively. The effect of the intense energy input (Q) of PEF treatment (over 28.85 J g(-1)) on the functionality of tapioca starch was investigated. Scanning electron microscopy analysis revealed the dissociation and damage of PEF treated tapioca starch granules. X-ray diffraction analysis demonstrated that tapioca starch tended to transform from crystalline to amorphous structure after PEF treatments. It was found that higher energy input (>49.36 J g(-1)) could destroy the crystal region of tapioca starch. Meanwhile, with increasing electric field strengths, the gelatinization temperature, the gelatinization enthalpy, the peak viscosity and the breakdown viscosity of PEF-treated samples showed a remarkable decrease. These results suggest that PEF treatments would be a promising physical method to modify the properties of starch in order to obtain desired products in food industry.
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, China.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Han
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, 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, China; Department of Chemical Engineering, Monash University, Australia.
authors.forename: Nan
authors.initials: N
authors.lastname: Fu
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, China.
authors.forename: Shu Juan
authors.initials: SJ
authors.lastname: Yu
authors.affiliation: Department of Chemical Engineering, Monash University, Australia.
authors.forename: Xiao Dong
authors.initials: XD
authors.lastname: Chen
authors.affiliation: Chembiotech Laboratories, Institute of Advanced Science and Technology, 5 The Croft, Buntsford Drive, Stoke Heath, Bromsgrove, Worcestershire B60 4JE, UK.
authors.forename: John F
authors.initials: JF
authors.lastname: Kennedy
mesh_terms: D055664:Electrochemical Techniques; D002365:Manihot / Q000737:chemistry*; D013213:Starch / Q000737:chemistry* / Q000648:ultrastructure
chemical_list: D013213:Starch