Evaluation studies on the combined effect of hydrothermal treatment and octenyl succinylation on the physic-chemical, structural and digestibility characteristics of sweet potato starch
文献类型: 外文期刊
作者: Lv, Qing-Qing 1 ; Li, Gao-Yang 2 ; Xie, Qiu-Tao 2 ; Zhang, Bao 1 ; Li, Xiao-Min 1 ; Pan, Yi 1 ; Chen, Han-Qing 1 ;
作者机构: 1.Hefei Univ Technol, Sch Food Sci & Technol, 193 Tunxi Rd, Hefei 230009, Anhui, Peoples R China
2.Hunan Acad Agr Sci, Hunan Agr Prod Proc Inst, Changsha, Hunan, Peoples R China
关键词: Octenyl succinic anhydride; Heat-moisture treatment; Sweet potato starch
期刊名称:FOOD CHEMISTRY ( 影响因子:7.514; 五年影响因子:7.516 )
ISSN: 0308-8146
年卷期: 2018 年 256 卷
页码:
收录情况: SCI
摘要: In order to increase the degree of substitution (DS), a combination of heat-moisture treatment (HMT) and octenyl succinylation (OSA) was used to modify sweet potato starch (SPS). The content of OSA had significant influence on the DS of starch, and DS of HMT OSA-modified SPS (HOSA-SPS) was higher than that of OSA-modified SPS (OSA-SPS), indicating that prior HMT could enhance the reaction. HOSA-SPS showed higher contents of SDS and RS in comparison with OSA-SPS as OSA concentration was beyond 6%. HMT decreased swelling power of starch while OSA modification had a contrary role (p < 0.05). Scanning electron microscopy (SEM) showed starch was destroyed by OSA modification while HMT had slight effect on the structure. X-ray diffraction (XRD) indicated that crystal type of starch was transformed from C-to A-type resulted from HMT, and remained unchanged by OSA modification. The onset, peak, and conclusion gelatinization temperatures of starch increased by HMT and decreased by OSA modification (p < 0.05).
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