LY-04 and WSQIF are newly-synthesized compounds which were presented by the Institute of Pesticides Chemistry, Central China Normal University. LY-04 belongs to α-oxophosphonic acid derivatives, while WSQIF is an aro...LY-04 and WSQIF are newly-synthesized compounds which were presented by the Institute of Pesticides Chemistry, Central China Normal University. LY-04 belongs to α-oxophosphonic acid derivatives, while WSQIF is an aromatic acetyl oxophosphonic acid derivative. In this study, the toxicity of LY-04 and WSQIF on Scenedesmus obliquus Kütz was examined. The EC 50 of LY-04 and WSQIF were determined in S. obliquus cells at 24h, 48h, 72h, 96h represented by cell density. Our data showed that the 24h, 48h, 72h, 96h EC 50 of LY-04 were 1983mg/L, 2943mg/L, 240mg/L and 65.0mg/L acetone, respectively, and the 24h, 48h, 72h, 96h EC 50 of WSQIF were 15.9mg/L, 53.0mg/L, 98.0mg/L and 28.8mg/L respectively. LY-04 displayed a higher insecticidal activity, while WSQIF showed a higher phytocidal activity. As LY-04 and WSQIF were designed to act as insecticide and herbicide, respectively, the results were in contrast to the anticipated ones. According to the toxicant classification standard, EC 50 of both substances was far higher than 3mg/L, while the toxicity of LY-04 and WSQIF to aquatic algae were fairly low, indicating that these two pesticides are rather safe to the aquatic ecosystem.展开更多
为确定最优的提取条件,以提高葛仙米藻胆蛋白的得率,采用三因素二次回归正交旋转组合设计试验,研究了磷酸缓冲液pH值、浸提时间和盐浓度对葛仙米藻胆蛋白得率的影响,建立了各因子与葛仙米藻胆蛋白得率关系的数学回归模型;最后确定了最...为确定最优的提取条件,以提高葛仙米藻胆蛋白的得率,采用三因素二次回归正交旋转组合设计试验,研究了磷酸缓冲液pH值、浸提时间和盐浓度对葛仙米藻胆蛋白得率的影响,建立了各因子与葛仙米藻胆蛋白得率关系的数学回归模型;最后确定了最佳的提取条件为:磷酸缓冲液pH值为7.3、浸提时间4.3 h、N aC l浓度0.21 m o l/L,葛仙米藻胆蛋白得率为7.125%。展开更多
文摘LY-04 and WSQIF are newly-synthesized compounds which were presented by the Institute of Pesticides Chemistry, Central China Normal University. LY-04 belongs to α-oxophosphonic acid derivatives, while WSQIF is an aromatic acetyl oxophosphonic acid derivative. In this study, the toxicity of LY-04 and WSQIF on Scenedesmus obliquus Kütz was examined. The EC 50 of LY-04 and WSQIF were determined in S. obliquus cells at 24h, 48h, 72h, 96h represented by cell density. Our data showed that the 24h, 48h, 72h, 96h EC 50 of LY-04 were 1983mg/L, 2943mg/L, 240mg/L and 65.0mg/L acetone, respectively, and the 24h, 48h, 72h, 96h EC 50 of WSQIF were 15.9mg/L, 53.0mg/L, 98.0mg/L and 28.8mg/L respectively. LY-04 displayed a higher insecticidal activity, while WSQIF showed a higher phytocidal activity. As LY-04 and WSQIF were designed to act as insecticide and herbicide, respectively, the results were in contrast to the anticipated ones. According to the toxicant classification standard, EC 50 of both substances was far higher than 3mg/L, while the toxicity of LY-04 and WSQIF to aquatic algae were fairly low, indicating that these two pesticides are rather safe to the aquatic ecosystem.
文摘为确定最优的提取条件,以提高葛仙米藻胆蛋白的得率,采用三因素二次回归正交旋转组合设计试验,研究了磷酸缓冲液pH值、浸提时间和盐浓度对葛仙米藻胆蛋白得率的影响,建立了各因子与葛仙米藻胆蛋白得率关系的数学回归模型;最后确定了最佳的提取条件为:磷酸缓冲液pH值为7.3、浸提时间4.3 h、N aC l浓度0.21 m o l/L,葛仙米藻胆蛋白得率为7.125%。
