摘要
通过测定对羟自由基、超氧负离子自由基的清除率和还原能力,研究了壳聚糖、硫脲壳聚糖及5种硫脲壳聚糖金属配合物的抗氧化活性。结果表明:在实验设置的浓度范围内,对羟自由基的清除能力依次为硫脲壳聚糖Cu(Ⅱ)>硫脲壳聚糖Fe(Ⅱ)>硫脲壳聚糖Co(Ⅱ)>硫脲壳聚糖Ni(Ⅱ)>硫脲壳聚糖Zn(Ⅱ),且清除能力随着浓度的增加而增强;对超氧负离子自由基清除能力依次为硫脲壳聚糖Ni(Ⅱ)>硫脲壳聚糖Zn(Ⅱ)>硫脲壳聚糖Co(Ⅱ)>硫脲壳聚糖Cu(Ⅱ)>硫脲壳聚糖Fe(Ⅱ),且清除能力随着浓度的增加而增强;还原能力依次为硫脲壳聚糖Co(Ⅱ)>硫脲壳聚糖Cu(Ⅱ)>硫脲壳聚糖Fe(Ⅱ)>硫脲壳聚糖Ni(Ⅱ)>硫脲壳聚糖Zn(Ⅱ)。
The antioxidant activities of five kinds of thiourea chitosan metal complex including the scavenging of hydroxyl radical,superoxide anion radical and reducing power were evaluated. The results showed that all of the five metal com- plexes of thiourea chitosan showed the antioxidant activity in different level. The scavenging of hydroxyl radical was thio- urea chitosan Cu ( Ⅱ ) 〉 thiourea chitosan Fe (Ⅱ ) 〉 thiourea chitosan Co(Ⅱ ) 〉 thiourea chitosan Ni( Ⅱ) 〉 thiourea chitosan Zn ( Ⅱ ) ;the scavenging effect on superoxide anion radical was thiourea Ni (Ⅱ ) 〉 thiourea chitosan Zn ( Ⅱ ) 〉 thiourea chitosan Co( Ⅱ ) 〉 thiourea chitosan Cu( Ⅱ ) 〉 thiourea chitosan Fe(Ⅱ ) and the reducing power was thi- ourea chitosan Co( Ⅱ ) 〉 thiourea chitosan Cu ( Ⅱ) 〉 thiourea chitosan Fe ( Ⅱ ) 〉 thiourea chitosan Ni( Ⅱ) 〉 thiou- rea chitosan Zn(Ⅱ ).
出处
《天然产物研究与开发》
CAS
CSCD
北大核心
2012年第12期1813-1815,共3页
Natural Product Research and Development
基金
天水师范学院物理无机化学重点学科基金(ZD0840)
天水师范学院中青年教师科研资助项目(TSA1003)
天水师院"青蓝"人才工程资助项目
关键词
硫脲壳聚糖
金属配合物
抗氧化
Thiourea chltosan
metal complex
antioxidant activity