title: Substituent distribution changes the pasting and emulsion properties of octenylsuccinate starch.
abstract: An improved preparation method of octenylsuccinate (OS) starch under high shear condition was described in this study. The distribution of OS substituents at the granular and molecular levels was assessed by confocal laser scanning microscopy (CLSM), β-amylase hydrolysis, chromatographic and (1)H NMR techniques. We found that the OS group distribution could change the pasting and emulsion properties of OS starches. Specifically, more uniform OS group distribution was identified in the central region of OS starch granules prepared under high shear condition (H-OS-starch), and OS groups were located both near the branching points and the non-reducing ends. More OS groups exposed outside of non-reducing ends would access the interface between oil and water and give more stabilized emulsion.
authors.affiliation: School of Light Industry and Food Sciences, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China.
authors.forename: Chan
authors.initials: C
authors.lastname: Wang
authors.affiliation: School of Light Industry and Food Sciences, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: He
authors.affiliation: School of Light Industry and Food Sciences, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China.
authors.forename: Xiong
authors.initials: X
authors.lastname: Fu
authors.affiliation: School of Light Industry and Food Sciences, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China. Electronic address: fechoh@scut.edu.cn.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Huang
authors.affiliation: School of Light Industry and Food Sciences, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China; Whistler Center for Carbohydrate Research and Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA. Electronic address: zhangb24@gmail.com.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
mesh_terms: D004655:Emulsions; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D013213:Starch / Q000737:chemistry*; D013314:Stress, Mechanical; D013386:Succinates / Q000737:chemistry*; D001614:beta-Amylase / Q000737:chemistry
chemical_list: D004655:Emulsions; D013386:Succinates; C028480:octenyl succinate; D013213:Starch; D001614:beta-Amylase
keywords: Emulsion; Octenylsuccinate starch; Retrogadation; Substituent distribution