Two compounds with strongly insecticidal and fungicidal activity, Kurarinone and Sophoraflavanone G , were isolated from Sophora flavescens Ait under the direction of bioassay, and comfirmed by UV, IR, MS and NMR. The...Two compounds with strongly insecticidal and fungicidal activity, Kurarinone and Sophoraflavanone G , were isolated from Sophora flavescens Ait under the direction of bioassay, and comfirmed by UV, IR, MS and NMR. The insecticidal activity of flavonoids from Sophora flavescens Ait was first reported here. The study of structure-activity relationship indicated that the methylation of 5-hydroxy on the phenyl ring would decrease the insecticidal and fungicidal activity of flavonoids.展开更多
The extraction of alkaloids from sophora flavescens ait with CO2SFE was studied.By use of orthogonal design ,the effects of pressure,temperature and time on extractabilities of alkaloids were studied.The results s...The extraction of alkaloids from sophora flavescens ait with CO2SFE was studied.By use of orthogonal design ,the effects of pressure,temperature and time on extractabilities of alkaloids were studied.The results showed that the optimum conditions of CO2SFE were:pressure 30 MPa,temperature 45℃,time 5h for the extraction,with NH4OH as an alkalizer and MeOH as an entrainer.The extraction rate of supercritical CO2 fluid extraction was about 24 times as that of traditional solvent extraction.展开更多
文摘Two compounds with strongly insecticidal and fungicidal activity, Kurarinone and Sophoraflavanone G , were isolated from Sophora flavescens Ait under the direction of bioassay, and comfirmed by UV, IR, MS and NMR. The insecticidal activity of flavonoids from Sophora flavescens Ait was first reported here. The study of structure-activity relationship indicated that the methylation of 5-hydroxy on the phenyl ring would decrease the insecticidal and fungicidal activity of flavonoids.
文摘The extraction of alkaloids from sophora flavescens ait with CO2SFE was studied.By use of orthogonal design ,the effects of pressure,temperature and time on extractabilities of alkaloids were studied.The results showed that the optimum conditions of CO2SFE were:pressure 30 MPa,temperature 45℃,time 5h for the extraction,with NH4OH as an alkalizer and MeOH as an entrainer.The extraction rate of supercritical CO2 fluid extraction was about 24 times as that of traditional solvent extraction.
