School of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
College of Food Science, South China Agricultural University, Guangzhou 510640, China.
Food Chem. 2018 May 30;249:127-135. doi: 10.1016/j.foodchem.2018.01.011. Epub 2018 Jan 6.
Water-soluble polysaccharides (RTFP) were extracted from Rosa roxburghii Tratt fruit by hot water method. The physicochemical, functional, and hypoglycemic properties of RTFP were investigated. The results revealed that RTFP mainly contained carbohydrates (63.79 ± 0.73%, g/g), uronic acids (14.8 ± 0.06%, g/g), and proteins (4.10 ± 0.58%, g/g). RTFP was composed of arabinose, galactose, glucose, mannose, xylose, and fucose with molar percentages of 33.8, 37.3, 20.7, 1.74, 3.43, and 2.95%, respectively. Functional analyses indicated that RTFP had good oil-holding capacity, foaming properties, and emulsifying capacity. The rheological results showed that RTFP exhibited typical shear-thinning behavior and viscoelastic properties influenced by sample concentration, temperature and inorganic salt. Additionally, RTFP exhibited favorable inhibitory activities against α-glucosidase in a mixed inhibition type, and against α-amylase in an uncompetitive inhibition type. These results suggest that RTFP can be exploited as a multi-functional additive or hypoglycemic agent in foods, pharmaceuticals and cosmetics.
水不溶性多糖（RTFP）从玫瑰果实中用热水法提取。研究了 RTFP 的理化性质、功能和降血糖特性。结果表明，RTFP 主要含有碳水化合物（63.79±0.73%，g/g）、糖醛酸（14.8±0.06%，g/g）和蛋白质（4.10±0.58%，g/g）。RTFP 由阿拉伯糖、半乳糖、葡萄糖、甘露糖、木糖和岩藻糖组成，摩尔百分比分别为 33.8%、37.3%、20.7%、1.74%、3.43%和 2.95%。功能分析表明，RTFP 具有良好的持油能力、起泡性和乳化能力。流变学结果表明，RTFP 表现出典型的剪切稀化行为和受样品浓度、温度和无机盐影响的粘弹性。此外，RTFP 对α-葡萄糖苷酶表现出混合抑制型的良好抑制活性，对α-淀粉酶表现出非竞争抑制型的良好抑制活性。这些结果表明，RTFP 可以作为一种多功能添加剂或降血糖药物应用于食品、药品和化妆品中。
