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 stability was studied of the pigment in red pulp plum (Prunus salicina Lindl). The results showed that the pigment had a high resistance to heat and it′s stability seemed to be affected greatly by pH, and red pu...The stability was studied of the pigment in red pulp plum (Prunus salicina Lindl). The results showed that the pigment had a high resistance to heat and it′s stability seemed to be affected greatly by pH, and red pulp plum was suitable to be applied for making acid food. Several kinds of metallic ions including Na + 、Zn 2+ had an effect of reinforcement on its tone, however Fe 3+ had a disruptive effect. Sucrose had no undesirable effect, but vitamin C had a significant undesirable effect. Also the preservative of sodium benzoate had a definite undesirable effect. The pigment showed strong resistance to reducer sodium sulfite but was very weak in resistance to oxidizer hydrogen peroxide.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 stability was studied of the pigment in red pulp plum (Prunus salicina Lindl). The results showed that the pigment had a high resistance to heat and it′s stability seemed to be affected greatly by pH, and red pulp plum was suitable to be applied for making acid food. Several kinds of metallic ions including Na + 、Zn 2+ had an effect of reinforcement on its tone, however Fe 3+ had a disruptive effect. Sucrose had no undesirable effect, but vitamin C had a significant undesirable effect. Also the preservative of sodium benzoate had a definite undesirable effect. The pigment showed strong resistance to reducer sodium sulfite but was very weak in resistance to oxidizer hydrogen peroxide.
