The pathogenic characteristics of scab-anthracnoge of Fatsia japonica was introduced,and the infection cycle,occurrence regularity and main harmful symptoms of the disease were elaborated.Prevention is the main method...The pathogenic characteristics of scab-anthracnoge of Fatsia japonica was introduced,and the infection cycle,occurrence regularity and main harmful symptoms of the disease were elaborated.Prevention is the main method to prevent scab-anthracnoge of F.japonica,and disease-free seedlings should be cultivated.Meantime,cultivation management should be strengthened to improve disease resistance of plant,and chemical agents must be timely sprayed in the early incidence stage,in order to achieve the purpose of comprehensive control.展开更多
采用醇提法提取八角金盘花总黄酮及并测定其抗氧化活性。在单因素试验的基础上,采用Box-Behnken中心组合试验设计和响应面(RSM)分析法,对八角金盘花总黄酮提取条件进行优化,建立并分析了乙醇浓度、料液比、温度和时间4因子与总黄酮得率...采用醇提法提取八角金盘花总黄酮及并测定其抗氧化活性。在单因素试验的基础上,采用Box-Behnken中心组合试验设计和响应面(RSM)分析法,对八角金盘花总黄酮提取条件进行优化,建立并分析了乙醇浓度、料液比、温度和时间4因子与总黄酮得率关系的数学模型。试验结果表明:最佳工艺参数为乙醇浓度59.90%,提取温度79.18℃,料液比为54.53 m L/g,提取时间为1.01 h。试验证明,此条件下总黄酮提取率达3.24%,与模型预测值3.25%基本一致。响应面模型回归方程与实际情况拟合良好,能较好地预测八角金盘花总黄酮的提取率。八角金盘花总黄酮具有DPPH·自由基清除能力略强于维生素C。展开更多
文摘The pathogenic characteristics of scab-anthracnoge of Fatsia japonica was introduced,and the infection cycle,occurrence regularity and main harmful symptoms of the disease were elaborated.Prevention is the main method to prevent scab-anthracnoge of F.japonica,and disease-free seedlings should be cultivated.Meantime,cultivation management should be strengthened to improve disease resistance of plant,and chemical agents must be timely sprayed in the early incidence stage,in order to achieve the purpose of comprehensive control.
文摘采用醇提法提取八角金盘花总黄酮及并测定其抗氧化活性。在单因素试验的基础上,采用Box-Behnken中心组合试验设计和响应面(RSM)分析法,对八角金盘花总黄酮提取条件进行优化,建立并分析了乙醇浓度、料液比、温度和时间4因子与总黄酮得率关系的数学模型。试验结果表明:最佳工艺参数为乙醇浓度59.90%,提取温度79.18℃,料液比为54.53 m L/g,提取时间为1.01 h。试验证明,此条件下总黄酮提取率达3.24%,与模型预测值3.25%基本一致。响应面模型回归方程与实际情况拟合良好,能较好地预测八角金盘花总黄酮的提取率。八角金盘花总黄酮具有DPPH·自由基清除能力略强于维生素C。