CAJ | 학술논문

合成了丁二酰化壳寡糖稀土(La, Nd, Eu)配合物,并考察其稀土配合物对羟自由基和超氧阴离子自由基的清除活性及其还原能力。实验表明：对超氧阴离子自由基的清除能力以及还原能力依次为：稀土配合物>丁二酰化壳寡糖>壳寡糖。在低浓度下对羟基自由基清除能力顺序为：丁二酰化壳寡糖>稀土配合物>壳寡糖,高浓度下丁二酰化壳寡糖和壳寡糖对羟基自由基清除能力急剧下降,而稀土配合物的清除能力稳定。这可能是由于稀土配合物的稀土离子含量及稀土离子性质、分子电荷密度以及对自由基清除机理不同所致。
합성료정이선화각과당희토(La, Nd, Eu)배합물,병고찰기희토배합물대간자유기화초양음리자자유기적청제활성급기환원능력。실험표명：대초양음리자자유기적청제능력이급환원능력의차위：희토배합물>정이선화각과당>각과당。재저농도하대간기자유기청제능력순서위：정이선화각과당>희토배합물>각과당,고농도하정이선화각과당화각과당대간기자유기청제능력급극하강,이희토배합물적청제능력은정。저가능시유우희토배합물적희토리자함량급희토리자성질、분자전하밀도이급대자유기청제궤리불동소치。
Succinic-oligochitosanrare earth (La (Ⅲ), Nd (Ⅲ),and Eu (Ⅲ))complexes were synthesized and char-acterized. Their antioxidant activities were evaluated by scavenging of superoxide radicals, and hydroxyl radicals and determination of reducing power. The results indicated that all the samples showed obvious antioxidant activity, the order of their scavenging effect on superoxide radicals and reducing power was complex>succinic-oligochitosan> oligochitosan; the order of their scavenging effect on hydroxyl radicals was succinic-oligochitosan>complex> oligochitosan at lower concentration. However, the scavenging effect of succinic-oligochitosan and oligochitosan was weakened sharply, and the scavenging effect of complex was stable at lower concentration. The results may be related to the content and properties of rare earth ion, molecular charge density and the different scavenging mecha-nisms against free radicals.