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| 1 | Pd(Ⅱ)与还原型辅酶Ⅰ和溶菌酶相互作用的荧光和共振瑞利散射光谱研究显示文摘在弱酸性介质中,Pd(Ⅱ)能分别与还原型辅酶Ⅰ(NADH)和溶菌酶(Lyso)形成1∶1和2∶1的复合物,并导致NADH和Lyso的荧光猝灭,但不能引起共振瑞利散射(RRS)的变化和增强.但是当Pd(Ⅱ)与NADH和Lyso同时作用并形成n(Pd(Ⅱ))∶n(NADH)∶n(Lyso)=2∶2∶1的三元复合物时,不仅能使Lyso的荧光猝灭,而且能引起RRS显著增强并出现最大散射波长位于309 nm附近的RRS光谱.研究了Pd(Ⅱ)-NADH-Lyso反应体系的荧光和RRS光谱特征,适宜的反应条件,探讨了反应机理及Pd(Ⅱ)与NADH和Lyso的结合位点和结合模式,考查了荧光猝灭和RRS增强的原因.当Pd(Ⅱ)和Lyso过量时,散射增强(ΔI)在一定范围内与NADH的质量浓度成正比,对NADH的检出限为5.7 ng/mL(8.6×10-9mol/L).同样当Pd(Ⅱ)和NADH过量时,散射增强(ΔI)在一定范围内与Lyso的质量浓度成正比,检出限为15.1 ng/mL(1.06×10-9mol/L).因此RRS光谱不仅可为研究金属离子与不同生物分子之间的相互作用提供新的信息,而且也为高灵敏度定量测定痕量NADH和Lyso这样的生物分子创造了条件. | 刘绍璞 刘林丰 刘忠芳 孔玲 胡小莉 田伦富 | 2013 | 西南大学学报(自然科学版)2013，35，11： | 2 |
| 2 | 接闪杆保护物理模型中侧击空域体积的计算及变化趋势分析显示文摘电气几何理论(EGM)理论认为雷电先导进入接闪杆周边划分的不同空域是接闪杆拦截雷电先导成功与否的决定因素,并且被保护物的侧击空域是反映被保护物发生侧击概率的重要因子.利用高等数学中极坐标积分的方法并利用数学软件Matlab推导出侧击空域体积模型公式,并对模型公式进行分析得出结论:①侧击空域体积与被保护物高度、接闪杆与被保护物距离成正比,与接闪杆高度成反比;②随接闪杆与其保护范围内物体两者之间距离增大,侧击空域先从0增大到最大值后减小至0. | 孙蔡亮 肖稳安 罗艳艳 姚永建 王涪德 | 2013 | 西南大学学报(自然科学版)2013，35，11： | 1 |
| 3 | Study on the interaction between palladium(II)-chlorpromazine hydrochloride and sodium tungstate by the resonance Rayleigh scattering, second-order scattering and frequency doubling scattering spectra and its analytical application显示文摘The interaction between palladium(II)-chlorpromazine hydrochloride and sodium tungstate was investigated by ultravioletvisible absorption,resonance Rayleigh scattering(RRS),second-order scattering(SOS)and frequency doubling scattering (FDS)spectroscopy.In pH 5.3 Britton-Robinson(BR)buffer medium,chlorpromazine hydrochloride(CPZ)reacted with Pd(II) to form 2:1 cationic chelate,which further reacted with Na2WO4 to form a 1:1 ternary ion-association complex ([Pd(CPZ)2]·WO4).As a result,the signal intensities of RRS,SOS and FDS were enhanced greatly,and the enhancements of scattering were proportional to the CPZ concentration in a certain range.Their maximum wavelengths were located at 310 nm, 570 nm and 391 nm,respectively and the detection limits(3)were 1.6 ng/mL(RRS method),3.2 ng/mL(SOS method)and 5.6 ng/mL(FDS method).The optimum reaction conditions,the influences of coexisting substances and analytical application were mainly investigated by RRS method due to its highest sensitivity.A highly sensitive,simple,rapid and new method had been proposed to determine CPZ in the pharmaceutical form and residue of CPZ in pork.In addition,the Gibbs free energy change(△Gf)of ion-association reaction was computed by using B3LYP/3-21g*/LanL2dz method.The formation of ion-association and the reasons for the enhancement of RRS were also discussed. | CHEN PeiLi LIU ShaoPu LIU ZhongFang HU XiaoLi LI CuiXia | 2011 | Science China Chemistry2011，54，3： | 1 |
| 4 | 共振散射技术在痕量药物分析中的研究进展显示文摘本文评述了共振散射技术在痕量药物分析中的研究进展。分别综述了药物与染料、金属离子、无机纳米粒子、表面活性剂、β-环糊精、无机酸根、有机溶剂等相互作用以及药物的自凝聚作用,使共振散射显著增强,从而提高药物检测灵敏度。 | 李海霞 蒋懿 蒋晔 | 2009 | 中国现代应用药学2009，26，11： | 0 |
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