作　　者： ; ;

机构地区： 江南大学食品学院

出　　处： 《水产科学》 2004年第2期15-19,共5页

摘　　要： 甲壳低聚糖(COS)具有优越的功能性质和生理活性,是国际上近年来发展的一种新型的低聚糖,有关甲壳低聚糖的一些特性的研究国内外未见报道。本文对这种低聚糖的带电性、热性质、吸湿保湿性、抑制淀粉老化等特性进行了研究。结果表明:(1)0.5%COS溶液当pH<9.7时,带正电荷。它的第一等当点是pH5.1,第二等当点是pH9.7;(2)DSC分析表明:COS的热分解温度范围为211～219℃,低于壳聚糖,COS的热稳定较壳聚糖差;(3)COS有优良的吸湿保湿性;(4)COS对淀粉老化具有显著的抑制作用。 Chitooligosaccharides(COS) were a new kind of developing oligosaccharides worldwide in recent years due to their superior functional characteristics and physiological activities,but there was almost no report about study on characteristics. The charge property, thermal property , moisture absorptivity and moisture retainment property, and restraint in starch aging of such oligossachirides were studied in the paper. It showed as follows: (1) The first equivalence point of 0.5 % COS solution was pH5.1,the second one was pH9.7, (2) By DSC (differential scanning calorimeter) study, the decomposed temperature of COS (between 211～219 ℃) was lower than that of chitosan ,so its thermal stability was less than that of chitosan, (3) COS had excellent moisture absorptivity and moisture retainment property, (4) COS had obvious resistance to starch aging.

关 键 词： 甲壳低聚糖 特性 带电性 热性质 稳定性 吸湿保湿性 抑制淀粉老化

领　　域： [生物学]