摘要
通过研究不同聚合度的粗低聚木糖(LL、ML、HL)及其中所含的木糖对羟自由基(·OH)清除活性的影响,对纯低聚木糖的平均聚合度与活性间的关系进行了评价。实验结果表明.粗低聚木糖对羟自由基(·OH)具有较好的清除活性。其中。高聚合度的粗低聚木糖(HL)对羟自由基(·OH)的清除活性最显著,IC_(50)约为14 mg/mL.而木糖对羟自由基(·OH)无清除活性,说明纯低聚木糖的平均聚合度越高,清除羟自由基(·OH)作用越显著。对木糖及不同聚合度粗低聚木糖+DPPH自由基进行紫外扫描.探讨纯低聚木糖对DPPH自由基的清除作用,结果表明,木糖及纯低聚木糖对DPPH自由基均没有清除能力。
The scavenging activities of in different degrees of polymerizations （DPs） of Xylooligosaccharides （LL,ML, HL）and relationship between xylose content and hydroxyl radicals（ . OH） scavenging activities were evaluated. The results showed that xylo-oligosaccharides had good scavenging activities to hydroxyl radicals（ . OH）. Among them, the high polymerizations （HL） has most remarkable scavenging effects and IC50 were about 14 mg/mL. However xylose has no scavenging activity to hydroxyl radicals （ . OH）. We concluded that the higher the DPs of the pure Xylooligosaccharides, the stronger the scaven- ging activities to hydroxyl radicals（ . OH）. The DPPH radicals scavenging effects of xylose and xylooligosaccharides in DPs were studied by the method of ultraviolet scanning. The results showed that neither had scavenging effects on DPPH radicals.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2008年第4期56-59,共4页
Food and Fermentation Industries
基金
国家自然科学基金资助(30571347)
科技部十一五支撑计划项目(2006BAD27B06)
