Liu Hongzhi, Jiang Nan, Liu Li, Sheng Xiaojing, Shi Aimin, Hu Hui, Yang Ying, Wang Qiang
Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, China.
Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Risk Assessment Lab for Agro-Products (Beijing)/Ministry of Agriculture, Beijing 100097, China.
Molecules. 2016 Jun 1;21(6):716. doi: 10.3390/molecules21060716.
The hot-water extraction, purification and characterization of polysaccharides from defatted peanut cake (PPC) were investigated in this study. A Box-Behnken factorial design (BBD) was used to investigate the effects of three independent variables, namely extraction temperature (X₁), extraction time (X₂) and ratio of water to raw material (X₃). The optimum conditions were 85 °C, 3 h and 20:1 (mL/g) respectively. Regression analysis was done to reveal the experimental results which include 34.97% extraction rate while the value verified under these conditions was 34.49%. The crude PPC was sequentially further purified by Sephadex G-100 chromatography, and one purified fraction was obtained. The PPC purified fraction was characterized by FT-IR, HPAEC; SEC-MALLS. The average molecular weight of the PPC purified fraction was 2.383 × 10⁵ Da. The polysaccharide was mainly composed of glucose, galactose, arabinose and xylose. The PPC have the typical absorption of polysaccharide.
本研究对脱脂花生饼(PPC)中多糖的热水提取、纯化及表征进行了研究。采用Box-Behnken析因设计(BBD)考察了3个自变量,即提取温度(X₁)、提取时间(X₂)和料液比(X₃)的影响。最佳条件分别为85℃、3小时和20:1(mL/g)。进行回归分析以揭示实验结果,其中提取率为34.97%,在这些条件下验证的值为34.49%。粗制PPC依次通过Sephadex G-100柱色谱进一步纯化,得到一个纯化级分。通过傅里叶变换红外光谱(FT-IR)、高效阴离子交换色谱(HPAEC)和体积排阻色谱-多角度激光光散射联用(SEC-MALLS)对PPC纯化级分进行了表征。PPC纯化级分的平均分子量为2.383×10⁵ Da。该多糖主要由葡萄糖、半乳糖、阿拉伯糖和木糖组成。PPC具有多糖的典型吸收峰。