对老鼠筋中类黄酮的提取及其生理活性进行初步研究,实验发现,采用水浸提的方法对新鲜叶片进行类黄酮的提取效果最好,提取率可达lO.9l%.经正交实验分析,确定水浸提法提取类黄酮的最佳条件为:温度100oC,提取时间2h,料液比l:7.对提取的类黄酮化合物的定性分析表明,在老鼠筋的茎叶中均含有黄酮、黄酮醇、二氢黄酮、二氢黄酮醇、4’-羟基黄酮醇和7,4’-二羟基黄酮醇等多种类型的类黄酮化合物.通过体外抗氧化分析表明,老鼠筋类黄酮粗提物具有较强的抗猪油氧化作用、清除羟自由基和抗脂质过氧化的能力.抑菌实验证明其对大肠杆菌、河弧菌等常见致病菌也有一定的抑制作用.
A high-order voltage-mode highpass The design formula for the CFA filter is given. highpass filters is designed and simulated with the design of highpass filter circuit is feasible. filters based on CFA is presented in this paper. As an example, a new fourth-order Butterworth pspice. It is shown by experimental results that