H_2BPMOPP和PMBP协同萃取Ln^(3+)的研究

The synergistic exrtraction of lanthanide ions(La3+,Pr3+,Nd3+ and Gd3+)by bis （1′-phenyl-3′-methyl-5′-pyrazolone-4′-yl）phthaldione（H2BPMOPP or H2A）with 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone（PMBP）from nitric acid solution was studied.The synergistic coefficient for La3+ is 5.21.The composition of the extracted compound was shown to be LaA·HA·PMBP.The pH1/2values for La3+,Pr3+,Nd3+,Gd3+ and Dy3+ are 4.16,3.79,3.56,3.29 and 2.99,respectively.The extraction equilibrium constants,enthalpy change and entropy change of the reaction were also calculated.

添加LZB-GC抗菌剂对玻璃离子水门汀抗菌性能和机械性能的影响

目的探讨添加不同比例的LZB-GC(载银纳米磷酸锆)抗菌剂对玻璃离子水门汀(GIC)机械性能和抗菌性能的影响。方法将LZB-GC抗菌剂按不同的比例:0 wt%(对照组)、1 wt%、2 wt%、3wt%、5 wt%(实验组)添加至GIC中,分别测试材料的表面硬度和弯曲强度及抗菌性能,利用SPSS 18.0软件对所得数据进行统计学分析。结果 3 wt%组GIC表面硬度显著提高(P<0.01);2 wt%组GIC弯曲强度显著提高(P<0.01);当LZB-GC含量达3 wt%(含)以上时,对变形链球菌的抑菌率达99%以上。结论 3 wt%组GIC在弯曲强度不降低的基础上,其抗菌性能及表面硬度均显著提高。