碱性过氧化氢处理对藕渣可溶性膳食纤维结构及流变学特性的影响  

Effect of Alkaline Hydrogen Peroxide Treatment on the Structure and Rheological Properties of Soluble Dietary Fiber from Lotus Root Residue

作　　者：徐磊 张倩 王佩瑶 王子成 黄琳茜 何玲 Xu Lei;Zhang Qian;Wang Peiyao;Wang Zicheng;Huang Linxi;He Ling(School of Life Science and Food Engineering,Huaiyin Institute of Technology,Huaian 223003,Jiangsu)

机构地区：[1]淮阴工学院生命科学与食品工程学院,江苏淮安223003

出　　处：《中国食品学报》2024年第5期245-253,共9页Journal of Chinese Institute Of Food Science and Technology

基　　金：国家自然科学基金项目(31801581)。

摘　　要：以藕渣作为主要原料,采用碱性过氧化氢(AHP)处理后提取可溶性膳食纤维(SDF),比较处理前、后所得藕渣SDF结构和流变学特性的变化。结果表明:经AHP处理后,藕渣SDF提取率提高了7.21倍(P<0.05),单糖组成分析表明其L-鼠李糖和D-半乳糖含量分别增加了51.85%和39.27%(P<0.05)。与未处理藕渣的SDF相比,AHP处理后藕渣SDF的分子质量减小,Zeta-电位从-24.80 mV降至-26.95 mV(P<0.05)。扫描电子显微镜、傅里叶变化光谱分析表明:AHP处理藕渣的SDF结构变得蓬松,表面变得粗糙,部分特征官能团发生变化。X-射线衍射、热重分析表明:经AHP处理的藕渣SDF结晶度降低,而其高温热稳定性提高。稳态、动态流变学分析表明:在Ca2+存在下AHP处理藕渣的SDF表现出更高的剪切黏度和更强的凝胶化能力。结论:AHP处理藕渣能改善所得SDF的结构及流变学特性,可为藕渣的开发利用提供一定的参考。The soluble dietary fiber(SDF)was extracted from lotus root residue after treatment with alkaline hydrogen peroxide(AHP),and the structure and rheological properties of SDF were compared before and after treatment.Results showed that after AHP treatment,the extraction rate of lotus root residue SDF was increased by 7.21 times(P<0.05),and the contents of L-rhamnose and D-galactose were significantly increased by 51.85%and 39.27%,respectively(P<0.05).Compared with untreated lotus root residue SDF,AHP treatment reduced the molecular weight of lotus root residue SDF,and the Zeta-potential was decreased from-24.80 mV to-26.95 mV(P<0.05).Scanning electron microscope and Fourier transform infrared spectroscopy analysis showed that the structure of lotus root residue SDF became loose,the surface became rough,and some characteristic functional groups changed after AHP treatment.X-ray diffraction and thermogravimetric analysis showed that the crystallinity of lotus root residue SDF after AHP treatment was decreased,but its thermal stability in high temperatures were improved.Furthermore,the steady-state and dynamic rheological analysis showed that in the presence of Ca2+,the SDF treated with AHP showed higher shear viscosity and stronger gelation ability.In conclusion,AHP treatment could effectively improve the structure and rheological properties of lotus root residue SDF,which could provide a reference for the development and utilization of lotus root residue.

关 键 词：碱性过氧化氢 藕渣 可溶性膳食纤维 结构 流变学特性 

分 类 号：TS254.9[轻工技术与工程—水产品加工及贮藏工程]