Department of Pharmaceutical Technology and Biopharmaceutics, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria.
Department of Pharmaceutical Technology and Biopharmaceutics, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria.
Food Chem. 2021 Nov 15;362:130167. doi: 10.1016/j.foodchem.2021.130167. Epub 2021 May 21.
The mucilage extracted from the convection-dried cladodes of O. ficus-indica and O. joconostle, two species of economic importance, delivered three fractions after methanol precipitation. Two were composed of high molar mass polysaccharides, and one included water-soluble mono-, di-, and oligosaccharides. The large polysaccharides have a molar mass range of 4.0 × 10 to 8.0 × 10 g·mol and are consistently composed of galactose, arabinose, xylose, and rhamnose; however, the content of galacturonic acid was different between both fractions and species. Their fermentability by selected probiotics was relatively low, 11-27 % compared to glucose, and decreased with increasing levels of galacturonic acid in the molecules. In the third fraction, previously unreported oligosaccharides were found. These include simple- and complex-structured galactooligosaccharides with arabinosyl-, xylosyl- and galacturonosyl acid residues. Their fermentability by prebiotic species can be ascribed more to their structural characteristics and monosaccharide composition than their molecular dimensions.
从具有经济重要性的两种物种，仙人柱和仙人球的对流干燥卷须中提取的黏液，经甲醇沉淀后得到三种馏分。其中两种由高分子质量多糖组成，另一种则包含水溶性单糖、二糖和寡糖。大的多糖的分子量范围在 4.0×10 到 8.0×10 g·mol 之间，并且始终由半乳糖、阿拉伯糖、木糖和鼠李糖组成；然而，两种馏分和物种之间半乳糖醛酸的含量不同。与葡萄糖相比，它们被选定的益生菌发酵的相对较低，为 11-27%，并且随着分子中半乳糖醛酸含量的增加而降低。在第三馏分中，发现了以前未报道的寡糖。这些寡糖包括具有阿拉伯糖基、木糖基和半乳糖醛酸残基的简单和复杂结构的半乳寡糖。它们被益生菌物种发酵的能力更多归因于它们的结构特征和单糖组成，而不是它们的分子尺寸。
