Ma Fanyi, Zhang Yun, Wen Yurong, Yao Yanna, Zhu Jinhua, Liu Xiuhua, Bell Alan, Tikkanen-Kaukanen Carina
Key Laboratory of Natural Medicine and Immune-Engineering of Henan Province, Key Laboratory for Special Functional Materials of Ministry of Education, Pharmaceutical College, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
Key Laboratory of Natural Medicine and Immune-Engineering of Henan Province, Key Laboratory for Special Functional Materials of Ministry of Education, Pharmaceutical College, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
Food Chem. 2017 Apr 15;221:919-925. doi: 10.1016/j.foodchem.2016.11.073. Epub 2016 Nov 24.
This study investigated the emulsification properties of polysaccharides from Dioscorea opposita Thunb. Graded alcohol precipitation was used to extract Dioscorea opposita polysaccharides fractions (4 samples) in different ranges of molecular weight. Sample 3 contained more glucose and protein (80.13% and 0.34%, respectively), and molecular weight was approximately 34,790Da, distributing narrowly. The droplet sizes and stabilities of emulsions made of gum arabic (GA) and polysaccharide samples at different concentrations and ratios were measured, specifically the emulsions of GA and medium-chain-triglycerides (MCT); polysaccharides and MCT; and polysaccharides, GA and MCT (1:1:1). The results indicated that sample 2 and 3 had emulsifying properties, and the emulsions made with sample 2, GA and MCT (1:1:1) presented the best emulsification properties. Therefore, polysaccharides of Dioscorea opposita could be utilised as a natural emulsifier that can be improved synergistically with other emulsifiers, such as gum arabic.
本研究考察了山药多糖的乳化性能。采用分级醇沉法提取不同分子量范围的山药多糖级分（4个样品）。样品3含有较多的葡萄糖和蛋白质（分别为80.13%和0.34%），分子量约为34,790Da，分布较窄。测定了不同浓度和比例的阿拉伯胶（GA）和多糖样品制成的乳液的液滴大小和稳定性，具体包括GA与中链甘油三酯（MCT）的乳液；多糖与MCT的乳液；以及多糖、GA和MCT（1:1:1）的乳液。结果表明，样品2和3具有乳化性能，由样品2、GA和MCT（1:1:1）制成的乳液表现出最佳的乳化性能。因此，山药多糖可作为一种天然乳化剂，能与其他乳化剂如阿拉伯胶协同增效。
