Study on Functional and Structure Properties of Soluble Dietary Fiber Modified by Extrusion-expansion Technology from Peanut Shells

• 作者: Lei WANG Lixin QIANG Miaoshu WANG Ruihuan DU Shuling SUN Weili ZHENG Xin ZHOU Xishuang XING Xueying TANG Yang LIU Zhe MENG
• 来源期刊: 农业生物技术:英文版
• 学科: 工学
• 关键词: Peanut shell Soluble dietary fiber MODIFICATION Heavy metal adsorption Structure property
• 年，卷（期）: 2020,（3）
• 页码范围: 137-139
• 页数: 3页
• 分类号: TS2

摘要

[Objectives] This study was conducted to investigate the feasibility of using modified peanut dietary fiber as a functional food ingredient. [Methods]Using peanut shells as a test material,the process parameters of soluble dietary fiber( SDF) modified by extrusion and expansion were studied,and the functional and structural characteristics of SDF before and after modification were discussed. [Results] The optimum conditions were as follows: screw speed 200 rpm,temperature 130 ℃ and moisture content 20 %,and the SDF extraction yield was 22. 3%. The modified SDF showed BCmax values of( 378. 5 ± 5. 3),( 278. 3 ± 3. 2)and( 167. 2 ± 2. 5) μmol/g and BCmin of( 30. 4 ± 1. 3),( 63. 4 ± 3. 7) and( 71. 3 ± 4. 2) μmol/L,for Pb,As and Cu,respectively,indicating that the adsorption to the three heavy metals was enhanced. The modified SDF had a porous network like honeycomb and swelled structure. [Conclusions]Therefore,it is feasible to modify SDF by extrusion and expansion.