Characterization of Moringa oleifera leaf polysaccharides extracted by coupling ionic liquid separation system with ultrasound irradiation,Journal of Food Process Engineering

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Characterization of Moringa oleifera leaf polysaccharides extracted by coupling ionic liquid separation system with ultrasound irradiation
Journal of Food Process Engineering ( IF 2.7 ) Pub Date : 2020-04-09 , DOI: 10.1111/jfpe.13417
Phyllis Naa Yarley Otu _{1,

2} , Richard Osae ₁ , Mustapha Taiye Abdullateef ₁ , Zhou Cunshan ₁ , Yu Xiaojie ₁ , Bright Kojo Azumah ₂

Affiliation

Replacement of organic solvents and short time for purification of polysaccharides has gained attention of researchers. Ionic liquid (IL) was optimally utilized to achieve the mentioned target. IL was coupled with ultrasound irradiation to obtain good yield of partially purified Moringa oleifera leaf polysaccharides. The yield of purified polysaccharides (75.11%) was close to the predicted (75.78%). Crude polysaccharides were found to be round group‐like shape while purified polysaccharides displayed compact flat thick‐slice shape under scanning electron microscopy. Using gas chromatography, galacturonic acid was detected as part of monosaccharide composition of crude polysaccharides. Functional groups associated with polysaccharides were confirmed using Fourier transform infrared spectroscopy. Using Congo red assay, polysaccharides were observed to be of nonhelical structure. The crude polysaccharide was more viscous in rheological property and had molecular weight of (304,700 g/mol). Using dynamic light scattering methodology, purified polysaccharides (24,370 g/mol) aggregated in water and possessed an excellent ABTS antiradical ability. Purification of polysaccharides using IL within a short time was feasible and presented useful characteristics needed in formulations by the food and pharmaceutical industries.

中文翻译：

离子液体分离-超声耦合提取辣木叶片多糖的表征

替代有机溶剂和短时间纯化多糖已引起研究人员的注意。离子液体（IL）被最佳地用于实现上述目标。IL结合超声辐照获得部分纯化的辣木的良好收率叶多糖。纯化多糖的收率（75.11％）接近预期值（75.78％）。粗多糖被发现呈圆团状，而纯化的多糖在扫描电子显微镜下显示出紧密的扁平厚片状。使用气相色谱法，半乳糖醛酸被检测为粗多糖的单糖组成的一部分。使用傅立叶变换红外光谱法确认了与多糖相关的官能团。使用刚果红测定法，观察到多糖具有非螺旋结构。粗多糖的流变性质更具粘性，分子量为（304,700 g / mol）。使用动态光散射方法，纯化的多糖（24，370 g / mol）聚集在水中，具有出色的ABTS抗自由基能力。在短时间内使用IL纯化多糖是可行的，并显示了食品和制药行业配方所需的有用特性。

更新日期：2020-04-09

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