摘要
在pH=6.8的Na2HPO4-NaH2P04缓冲体系中,采用酶动力学方法研究了槟榔花沸水提取物(BWE)对酪氨酸酶活力的抑制作用。结果表明,BWE对酪氨酸酶的活性有良好的抑制作用,其IC50值为0.77 mg/mL。BWE对酪氨酸酶的抑制作用表现为非竞争性抑制,表观米氏常数(Km)为0.35 mM,抑制常数(KI)为0.13 mg/mL。
The change rule of four micro-nutritive elements including Fe,Mn,Cu and Zn in different leaf arrangement of coconut was studied.The results showed that the four micro-nutritive element’s content was different in different trees.On the whole,the content of Fe,Mn,Zn increased while the that of Zn declined from NO.3 leaf to NO.37 leaf.The change scope of Fe,Mn,Cu,and Zn was 31.59187.3,22.06221.0,3.459.78,10.350.0 mg/kg,respectively.
出处
《热带作物学报》
CSCD
2010年第11期1932-1936,共5页
Chinese Journal of Tropical Crops
基金
海南省重点科技资助项目(No.090138)
海南省自然科学基金(No.310101)资助
关键词
槟榔花沸水提取物
酪氨酸酶
抑制作用
动力学
Areca inflorescence boiling water extract
Tyrosinase
Inhibitory effect
Kinetics
