摘要
用月桂酰氯对二氢杨梅素进行不同程度的酯化修饰,探讨不同程度的酯化修饰对二氢杨梅素溶解性和抗氧化性能的影响。结果表明:与二氢杨梅素相比,二氢杨梅素酯化物在油中的溶解度提高20～300倍,并且随着酯化程度加大,二氢杨梅素酯化物在油中溶解度增加。二氢杨梅素酯化物在极性溶剂中清除DPPH自由基和H2O2的能力比二氢杨梅素低,酯化物的抗氧化活性随着酯化程度的增加呈下降趋势;在铁离子-抗坏血酸诱导的卵磷脂过氧化反应体系中,二氢杨梅素酯化物的抗氧化活性明显优于二氢杨梅素,且不受酯化程度的影响,表明二氢杨梅素及其酯化物在卵磷酯脂质体中的抗氧化活性受溶解性和羟基数目双重影响。
The molecule of dihydromyricetin（DMY） was chemically modified with lauroyl chloride,producing dihydromyricetin laurate（DMYL）.The solubility and antioxidant properties of DMY andDMYL were explored.The results showed that the solubility of DMYL in oil phase increased 20-300 times when compared with DMY.The solubility of DMYL in oil phase increased with the increase of esterification degree.The scavenging effects of DMYL on DPPH free radicals and H2O2 in polar solvents were both weaker than those of DMY,decreasing with the increase of esterification degree.However,the inhibitory effect of DMYL on lecithin peroxidation induced by Fe2＋/VC was markedly superior to that of DMY and not affected by the esterification degree.It is suggested that the antioxidant properties of DMY and DMYL are influenced by both solubility and the amount of hydroxyl groups.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2011年第1期66-69,共4页
Food Science
基金
湖北省教育厅重点项目(D20091401)
湖北工业大学高层次人才启动基金项目(BSQD0814)
湖北省自然科学基金项目(2008CDZ001)
关键词
二氢杨梅素
月桂酰氯
酯化反应
溶解性
抗氧化活性
dihydromyricetin
lauroyl chloride
esterification
solubility
antioxidant activity
