Structure and rheological properties of the seed-surface mucilage of Karin (Chaenomelese sinensis).

通常被丢弃的Karin（Chaenomelese sinensis）种子被透明的粘液包围，这种粘液似乎很容易用水提取得到水胶体溶液。本文报道了Karin种子表面粘液的结构特征及其胶体特性。Karin种子表面粘液的结构特征为O-2-取代D-葡萄糖醛酸-L-阿拉伯-（1→4）-β-D-木聚糖。这种独特的种子表面粘液可能是由上述酸性多糖和D-木（1→4）-β-D-葡聚糖通过分子间氢键结合而形成的。纤维状纤维素不像温柏那样通过Karin粘液的水解而被发现。其触变性和保水性表明其在食品添加剂和化妆品（如化妆水）中具有良好的应用前景。

The seeds of Karin (Chaenomelese sinensis), usually discarded, are surrounded with transparent mucilage, which appears readily extractable with water to give hydrocolloidal solution. We report the structural features of Karin seed-surface mucilage and its colloidal characteristics. The structural feature of Karin seed-surface mucilage was assumed as O-2-substituted D-glucurono-L-arabino-(1→4)-ss-D-xylan. This unique seed-surface mucilage may be built up with the above acidic polysaccharide and D-xylo (1→4)-ss-D-glucan, associated by intermolecular hydrogen bonding. Fibrous form cellulose was not found by hydrolysis of the Karin mucilage, not like quince. The thixotropic behavior and water-holding capabilities of the mucilage show Karin seed mucilage is appreciable to food additives and cosmetic utilization, such as lotion.