目的合成性质稳定的叶酸壳聚糖纳米粒,并加载地西他滨,观察其对舌癌SCC-9细胞的抑制率。方法我们采用离子交联法合成叶酸壳聚糖载地西他滨纳米粒,测其形态、平均粒径、电位,检测载药率以及包封率,并观察纳米粒作用于舌癌细胞后,载药纳...目的合成性质稳定的叶酸壳聚糖纳米粒,并加载地西他滨,观察其对舌癌SCC-9细胞的抑制率。方法我们采用离子交联法合成叶酸壳聚糖载地西他滨纳米粒,测其形态、平均粒径、电位,检测载药率以及包封率,并观察纳米粒作用于舌癌细胞后,载药纳米粒对舌癌细胞的抑制作用。结果叶酸壳聚糖载药纳米粒平均粒径为212 nm,Zeta电位为31.8 m V,性质稳定。载药纳米粒的包封率为75%,载药率为18%。载药纳米粒组较单纯加药组对舌癌细胞SCC-9抑制率高。结论叶酸壳聚糖载DAC纳米粒成功合成,性质稳定,载药率以及包封率较高,能够靶向作用于舌癌细胞SCC-9,抑制SCC-9的生长。展开更多
用CH3COONa溶液处理合成多级孔ZSM-5分子筛,对处理前后的样品采用XRD、XRF、BET、SEM进行表征,并分别负载Fe,进行高浓度有机胺废水的催化氧化降解。结果表明,采用CH3COONa溶液处理ZSM-5分子筛,具有碱改性的作用,且显著提高了催化氧化降...用CH3COONa溶液处理合成多级孔ZSM-5分子筛,对处理前后的样品采用XRD、XRF、BET、SEM进行表征,并分别负载Fe,进行高浓度有机胺废水的催化氧化降解。结果表明,采用CH3COONa溶液处理ZSM-5分子筛,具有碱改性的作用,且显著提高了催化氧化降解有机胺废水性能。在此基础上,运用正交试验对催化氧化降解有机胺废水条件进行优化,确定出试验范围内的最佳评价条件:反应时间为90 min,反应温度为95℃,催化剂用量为30g/L,溶液初始pH为4,氧化剂H2O2用量为45 m L/L,经过3次验证试验证明,该反应条件具有高度的可靠性和重现性,在此条件下,COD去除率高达98.73%。展开更多
The injection characteristics of the main fuel nozzle,which is widely applied in advanced lean-premixed-prevaporized(LPP)low-emission combustors,can be simplified as the atomization and vaporization processes of a jet...The injection characteristics of the main fuel nozzle,which is widely applied in advanced lean-premixed-prevaporized(LPP)low-emission combustors,can be simplified as the atomization and vaporization processes of a jet into cross-flow.In this study,a nozzle with a diameter of 0.4 mm is designed and processed through the heating of the inlet air,and the vaporization characteristics are investigated.The optical measurement and cyclone separation methods are separately used to investigate the evaporation rate of a jet into cross-flow.Experimental results show that the fuel evaporation rate in cross-flow is mainly affected by the Weber number(We),equivalent ratio(φ),momentum rate of fuel to air(q),and air temperature.In addition,the inlet temperature is a crucial factor for the evaporation ratio of a jet into cross-flow.The evaporation results measured by two different methods in the same cross-flow are very close to each other with a deviation within 10%.展开更多
文摘目的合成性质稳定的叶酸壳聚糖纳米粒,并加载地西他滨,观察其对舌癌SCC-9细胞的抑制率。方法我们采用离子交联法合成叶酸壳聚糖载地西他滨纳米粒,测其形态、平均粒径、电位,检测载药率以及包封率,并观察纳米粒作用于舌癌细胞后,载药纳米粒对舌癌细胞的抑制作用。结果叶酸壳聚糖载药纳米粒平均粒径为212 nm,Zeta电位为31.8 m V,性质稳定。载药纳米粒的包封率为75%,载药率为18%。载药纳米粒组较单纯加药组对舌癌细胞SCC-9抑制率高。结论叶酸壳聚糖载DAC纳米粒成功合成,性质稳定,载药率以及包封率较高,能够靶向作用于舌癌细胞SCC-9,抑制SCC-9的生长。
文摘用CH3COONa溶液处理合成多级孔ZSM-5分子筛,对处理前后的样品采用XRD、XRF、BET、SEM进行表征,并分别负载Fe,进行高浓度有机胺废水的催化氧化降解。结果表明,采用CH3COONa溶液处理ZSM-5分子筛,具有碱改性的作用,且显著提高了催化氧化降解有机胺废水性能。在此基础上,运用正交试验对催化氧化降解有机胺废水条件进行优化,确定出试验范围内的最佳评价条件:反应时间为90 min,反应温度为95℃,催化剂用量为30g/L,溶液初始pH为4,氧化剂H2O2用量为45 m L/L,经过3次验证试验证明,该反应条件具有高度的可靠性和重现性,在此条件下,COD去除率高达98.73%。
基金supported by the National Natural Science Foundation of China (Nos.51676097, 91741118)
文摘The injection characteristics of the main fuel nozzle,which is widely applied in advanced lean-premixed-prevaporized(LPP)low-emission combustors,can be simplified as the atomization and vaporization processes of a jet into cross-flow.In this study,a nozzle with a diameter of 0.4 mm is designed and processed through the heating of the inlet air,and the vaporization characteristics are investigated.The optical measurement and cyclone separation methods are separately used to investigate the evaporation rate of a jet into cross-flow.Experimental results show that the fuel evaporation rate in cross-flow is mainly affected by the Weber number(We),equivalent ratio(φ),momentum rate of fuel to air(q),and air temperature.In addition,the inlet temperature is a crucial factor for the evaporation ratio of a jet into cross-flow.The evaporation results measured by two different methods in the same cross-flow are very close to each other with a deviation within 10%.
