School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China.
Int J Biol Macromol. 2019 May 15;129:778-785. doi: 10.1016/j.ijbiomac.2019.02.074. Epub 2019 Feb 14.
Potato peel was used for the extraction of three types of polysaccharides (PW, PAL, and PAC) using water, alkaline, and acid treatments, respectively. The structure of the PP polysaccharides was examined by means of Fourier transform infrared spectroscopy (FT-IR) analysis and Gas chromatography-mass spectrometry (GC-MS). The results suggest that the extracted polysaccharides constituted essentially three functional groups: CO, CH, and OH. The polysaccharides were comprised of low proportions of proteins, 17-23% uronic acids, and approximately 70% carbohydrates. PAL, PW, and PAC with molecular weights of 2.25 × 10, 2.18 × 10, and 1.92 × 10 kDa, respectively, were composed of rhamnose, xylose, mannose, arabinose, glucose, and galactose. Functional properties (solubility, oil holding capacity, foaming, and emulsion properties) of these polysaccharides were evaluated. Among three, PAL showed the highest fat-binding capacity which was 7.50 g/g with the solubility of 95.06%. The three polysaccharides possessed appreciable in vitro anti-oxidant (scavenging DPPH and ABTS radicals, chelating ferrous ions, and reducing power) potential. PAL exhibited the strongest reducing power, scavenging activity on DPPH radicals and chelating capability on ferrous ions. PP polysaccharides can be used as promising natural antioxidants in food, pharmaceutical, and cosmetic preparations.
马铃薯皮分别经水提、碱提和酸提三种方法提取得到三种多糖（PW、PAL 和 PAC）。采用傅里叶变换红外光谱（FT-IR）分析和气相色谱-质谱联用（GC-MS）对 PP 多糖的结构进行了检测。结果表明，提取的多糖主要由三个官能团组成：CO、CH 和 OH。多糖由低比例的蛋白质、17-23%的糖醛酸和大约 70%的碳水化合物组成。PAL、PW 和 PAC 的分子量分别为 2.25×10、2.18×10 和 1.92×10 kDa，由鼠李糖、木糖、甘露糖、阿拉伯糖、葡萄糖和半乳糖组成。对这些多糖的功能特性（溶解度、持油能力、泡沫和乳化特性）进行了评估。在这三种多糖中，PAL 表现出最高的脂肪结合能力，为 7.50 g/g，溶解度为 95.06%。三种多糖均具有一定的体外抗氧化（清除 DPPH 和 ABTS 自由基、螯合亚铁离子和还原能力）潜力。PAL 表现出最强的还原能力、对 DPPH 自由基的清除活性和对亚铁离子的螯合能力。PP 多糖可用作有前途的天然抗氧化剂，应用于食品、制药和化妆品制剂。
