辐照降解魔芋葡甘聚糖产物的制备及结构表征  

Preparation and Structural Characterization of Irradiation-Degraded Konjac Glucan Products

作　　者：张婉 王雪莉 阙凤 汪兰[2] 石柳 郭晓嘉 孙卫青[1] 熊光权[2] ZHANG Wan;WANG Xueli;QUE Feng;WANG Lan;SHI Liu;GUO Xiaojia;SUN Weiqing;XIONG Guangquan(College of Life Science,Yangtze University,Jingzhou,Hubei 434000;Institute of Agro-Products Processing and Nuclear Agricultural Technology,Hubei Academy of Agricultural Sciences/Key Laboratory of Agricultural Products Cold Chain Logistics,Ministry of Agriculture and Rural Affairs,Wuhan,Hubei 430000)

机构地区：[1]长江大学生命科学学院,湖北荆州434000 [2]湖北省农业科学院农产品加工与核农技术研究所/农业农村部农产品冷链物流技术重点实验室,湖北武汉430000

出　　处：《核农学报》2024年第7期1291-1297,共7页Journal of Nuclear Agricultural Sciences

基　　金：湖北省农业科技创新中心2020重大科技研发专项(2020-620-000-002-03);2023年湖北省博士后创新实践岗位。

摘　　要：为促进魔芋葡甘聚糖(KGM)降解产物的高效利用,本研究围绕辐照对魔芋葡甘聚糖(KGM)降解产物的影响展开,比较不同辐照剂量处理下魔芋葡甘聚糖(KGM)分子量、特征黏度、可溶性糖含量、电化学特性、外观色泽、微观及化学结构、晶体结构的变化。结果表明,与未辐照处理相比,KGM辐照降解产物的主链结构未改变,结晶区减弱;随着辐照剂量的增加,分子质量从未辐照处理的894.6 kDa降至32 kGy辐照处理的4.70 kDa,特征黏度及可溶性总糖含量降低;扫描电子显微镜结果显示,辐照降解产物呈片状且出现孔洞,组间Zeta电位差异显著。本试验结果可为KGM辐照降解改性和资源高效利用提供参考。In order to promote the efficient utilization of the degradation products of konjac glucomannan(KGM),this research studied the effects of irradiation on the degradation products of KGM.The changes of molecular weight,intrinsic viscosity,soluble sugar content,electrochemical properties,appearance,color,microstructure,chemical structure,and crystal structure of(KGM)were investigated under different irradiation doses.The results showed that there was no change in the main chain structure and weakened crystalline region of KGM irradiated degradation products compared with the unirradiated KGM.With irradiation dose increased,the KGM irradiated degradation products showed a decreased molecular mass from 894.6 to 4.70 kDa,as well as a decreasing trend of intrinsic viscosity and total soluble sugar content.SEM results showed that the irradiated degradation products of KGM were flaky and porous,and the Zeta potential was significantly changed.This work provided a strategy about the degradation and modification of KGM by irradiation for the efficient utilization of resources.

关 键 词：魔芋葡甘聚糖 辐照降解 结构表征 

分 类 号：TS201.2[轻工技术与工程—食品科学]