查询词典 fluorescence

The fluorescence properties of complexes of europium with β-diketone and terbium with benzoic acid and its derivatives were analyzed and the synergic effect of the second ligand was illustrated from the energy matching of the minimum triplet state of ligands and the resonance energy level of rare earth ions.

提出了掺杂离子荧光增强效应的机理。 4。首次采用ab initio CIS方法，在劈裂价层基组3—21G水平上对各配体进行了量化计算，系统分析了前线分子轨道特征和激发态的能级，从配体最低激发三重态能级与稀土离子共振能级的能级匹配，分析了铕与β-二酮的配合物的荧光性能和铽与苯甲酸系列衍生物的配合物的荧光性能，解释了第二配体的协同效应。

After hybridization of two DNA probes with target DNA, EDTA-〓 and β-diketone come close to each other, and an EDTA-〓-β-diketonate ternary complex having strong and long-lived fluorescence was formed, thus the target DNA was detected sensitively with a detection limit of 6 pM (0.6 fmol per assay) by time-resolved mode.

系统研究了使用EDTA-〓为标记物的石墨炉原子吸收光谱免疫分析法，并将之用于人血清中AFP和水中BSM的测定。该法中使用了EDTA-〓标记SA及生物素标记抗体或抗原，在96孔板中的免疫反应结束后，利用稀硝酸将反应产物分解，然后用石墨炉原子吸收光谱法对免疫反应产物进行测定。

All showed strong chlorophyll a fluorescence signals originating from the dinoflagellate endosymbionts.

均具有很强的叶绿素a荧光信号，这些信号来源于体内共生的甲藻。

It is found that the fluorescence intensity is increased with the elevation of temperature when the quencher diphenylamine is added to PU-DFY, which is an inverse phenomenon against the general fluorescent materials.

研究还发现，加入二苯胺猝灭剂的PU-DFY，荧光强度随温度的升高而增强，与一般荧光物质荧光强度的温度特性相反。关键词：聚氨酯-分散荧光黄；高分子荧光染料；水分散体；荧光

Subsequently, the tapetum cell began to disorganize, and it kept the strongest Ca^2＋ fluorescence intensity from microspore to pollen maturity until the tapetum was disappeared completely.

在花药壁组织内Ca^2＋分布也呈现规律性的变化：造孢组织时期，花药壁组织Ca^2＋荧光强度在不同壁层组织中分布均匀；小孢子母细胞时期，药壁中层细胞Ca^2＋荧光最强，绒毡层细胞次之；单核小孢子时期，绒毡层细胞呈解体状态，Ca^2＋荧光最强，并保持到二核花粉时期直至绒毡层完全消失，但此时花药纤维层发育形成，表现出较强的Ca^2＋荧光。

Its acidic dissociation constant at ground and excited state are determined based on the changes of the absorption and fluorescence spectra in the water.

基于不同pH值水溶液中吸收和荧光光谱的变化，计算得该试剂基态和激发态分子的酸性常数（pKa＝ 8.84， pKa＝ 5.11）。

It is possible to simultaneously examine the polarity and viscosity of medium when DNP is used as a fluorescence probe.

这一性质，再加上激基缔合物峰与单体峰强度比反映介质粘度，使DNP成为能同时探测介质极性和粘度的荧光探针。

The other factors are also discussed impacting fluorescence property of rare earth doped systems.

还讨论了各种因素对稀土掺杂体系的荧光性质的影响。

Futhermore, the effect of Doppler broadening on laser without inversion is extented to another very important field of the interaction of the coherent field and atoms---the resonant fluorescence.

进一步地，本文把多普勒加宽对无反转激光的影响推广到光与物质相互作用的另一重要领域，共振荧光的研究中。

But under the insertion effect model, and since ssDNA does not have the double-helical struacutre of dsDNA, clinafloxacin does not show any fluorescence quenching effect.

在静电作用模式下，克林沙星与DNA骨架上的磷酸基团发生作用，其对ssDNA和dsDNA的猝灭程度应相等，而在插入作用模式下，ssDNA没有dsDNA的双螺旋结构，克林沙星应不对其发生猝灭作用。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。