碱性过氧化氢处理对藕渣不溶性膳食纤维结构及功能特性的影响
Effect of Alkaline Hydrogen Peroxide Treatment on Structure and Functional Properties of Insoluble Dietary Fiber from Lotus Root Residue
张倩 1王佩瑶 1王子成 1黄琳茜 1何玲 1徐磊1
作者信息
- 1. 淮阴工学院 生命科学与食品工程学院 江苏淮安 223003
- 折叠
摘要
采用碱性过氧化氢(AHP)处理藕渣,比较处理前、后藕渣不溶性膳食纤维(IDF)结构和功能特性的变化.结果表明:AHP处理后藕渣IDF的D-葡萄糖质量分数显著增加了9.52％(P＜0.05),而其它单糖含量均显著降低(P＜0.05).扫描电子显微镜分析表明,AHP处理后的IDF结构蓬松,表面起皱并出现解离断裂.X-射线衍射发现AHP处理后IDF晶体结构虽未发生改变,但衍射强度由13.09％增加至16.13％(P＜0.05).傅里叶红外光谱分析表明,AHP处理后IDF的部分官能团发生变化,特征峰减弱或消失.热重分析发现AHP处理后IDF热解峰值温度降低,质量残留率从10.43％提高到15.94％(P＜0.05).AHP处理后IDF的持水力、持油力、胆固醇吸附能力、Cu2+吸附能力和阳离子交换能力均显著提高(P＜0.05),亚硝酸钠吸附能力未发生显著变化(P＞0.05),而膨胀力显著降低(P＜0.05).综上,AHP处理使藕渣IDF的结构发生变化,功能性质得到改善.
Abstract
This study investigated the changes of structure and functional properties of insoluble dietary fiber(IDF)from lotus root residue before and after alkaline hydrogen peroxide(AHP)treatment.Results showed that D-glucose content of lotus root residue IDF increased significantly by 9.52％(P＜0.05),while the contents of other monosaccharides decreased significantly(P＜0.05)by AHP treatment.Scanning electron microscopy analysis showed that IDF had fluffy structure and wrinkled surface after AHP treatment.The results of X-ray diffraction indicated the crystal structure of IDF did not change after AHP treatment,but the diffraction intensity increased from 13.09％to 16.13％(P＜0.05).Infrared spec-troscopy indicated the breakage of some chemical bonds of IDF after AHP treatment,and the characteristic adsorption peaks weakened or disappeared.Thermogravimetric analysis showed that after AHP treatment,the peak pyrolysis tempera-ture of IDF decreased,but the mass residue rate increased from 10.43％to 15.94％(P＜0.05).Moreover,the water hold-ing capacity,oil holding capacity,cholesterol adsorption capacity,Cu2+adsorption capacity and cation exchange power of IDF were effectively enhanced(P＜0.05)after AHP treatment,sodium nitrite adsorption capacity of did not change signif-icantly(P＞0.05),while the expansion capacity was greatly reduced(P＜0.05).These results suggested that AHP treatment can change the structure of lotus root residue IDF and improve its functional properties.
关键词
碱性过氧化氢/藕渣/不溶性膳食纤维/结构/功能特性Key words
alkaline hydrogen peroxide/lotus root residue/insoluble dietary fiber/structure/functional properties引用本文复制引用
基金项目
国家自然科学基金项目(31801581)
江苏省大学生创新创业训练计划资助项目(202211049091Y)
江苏省大学生创新创业训练计划资助项目(202211049427YJ)
出版年
2024
NETL
NSTL
万方数据