Laboratory for the Improvement of Plants and Valorization of Agroresources, National School of Engineering of Sfax (ENIS), University of Sfax, Sfax 3038, Tunisia.
ESCOM, UTC, EA 4297 TIMR, 1 Allée du Réseau Jean-Marie Buckmaster, 60200 Compiègne, France.
Molecules. 2020 May 8;25(9):2210. doi: 10.3390/molecules25092210.
In this study, the physicochemical characterization, functional properties, and antioxidant activity of polysaccharides extracted from (EAP) were investigated. EAP were extracted in water during 3 h with a liquid/solid ratio of 5 in a water bath at 90 °C. The structure of the extracted EAP was examined by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and gas chromatography-mass spectrometry (GC-MS). The functional properties and biochemical activities of EAP were determined. The chemical analysis revealed that the contents of carbohydrates, uronic acid, and proteins were 73.24% ± 1.24%, 6.82% ± 0.57%, and 6.56% ± 0.36%, respectively. The results showed that the extracted EAP essentially contain three functional groups: C=O, C-H, and O-H. SEM images showed that EAP present numerous high porosity particles. The monosaccharide composition revealed a polymer composed of glucose (43.1%), galactose (36.4%), mannose (14.9%), arabinose (3.7%), and gluconic acid (1.7%). EAP showed interesting functional properties (solubility, oil holding capacity, foaming and emulsion properties). Finally, the results revealed that EAP displayed excellent antihypertensive and antioxidant activities. Overall, EAP present a promising natural source of food additives, antioxidants, and antihypertensive agents.
在这项研究中，研究了从 （EAP） 中提取的多糖的物理化学特性、功能特性和抗氧化活性。EAP 在 90°C 的水浴中以液固比 5 用 3 小时的时间在水中提取。通过傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）和气相色谱-质谱联用（GC-MS）检查了提取的 EAP 的结构。测定了 EAP 的功能特性和生化活性。化学分析表明，碳水化合物、糖醛酸和蛋白质的含量分别为 73.24%±1.24%、6.82%±0.57%和 6.56%±0.36%。结果表明，提取的 EAP 主要含有三种官能团：C=O、C-H 和 O-H。SEM 图像显示 EAP 呈现出许多高孔隙度的颗粒。单糖组成表明聚合物由葡萄糖（43.1%）、半乳糖（36.4%）、甘露糖（14.9%）、阿拉伯糖（3.7%）和葡萄糖酸（1.7%）组成。EAP 表现出有趣的功能特性（溶解性、持油能力、起泡和乳化性能）。最后，结果表明 EAP 具有出色的降压和抗氧化活性。总的来说，EAP 是一种有前途的天然食品添加剂、抗氧化剂和降压剂来源。
