查询词典 fluorescence

Because of the little difference in the structure, their ratios of fluorescence emissions cover with two different broad range, which are ideal for accurate near- physiological and alkalescent conditions pH measurements respectively.

由于HC1和HC2结构上的微小差异，使得两个化合物荧光强度的比值分别落于两个不同的pH区段内，因此，可分别用于近生理条件及弱碱性条件下pH的准确测量。

The reaction of monoporphyrins having different functional groups with dibromopropane gave metalloporphyrin potassium trimer with two alkoxyl linkages(C144H104N12O8K16)and square array tetramer with the property to quench fluorescence.

利用合成带有混合取代基团的卟啉单体和二溴丙烷反应得到了具有荧光淬灭性质的线状卟啉三聚体C144H104N12O8K16和方阵式四聚体。

The intrinsic fluorescence of PAMAM dendrimer is due to an n→π(superscript *) transition from the amido groups throughout the dendritic structure and the close spherical structure of PAMAM.

PAMAM树形分子发射强荧光是沿树形结构方向的酰胺基团中的n→π跃迁和其密实的球状结构共同作用的结果。

Pot experiments were carried out to study the effect of petroleum hydrocarbon pollutants in soil on physiological and chlorophyll fluorescence response of Forsythia suspense, Hydrangea paniculata and Amorpha fruticosa.

通过盆栽试验，研究了不同浓度的石油烃胁迫对连翘、大花水桠木、紫穗槐生理及叶绿素荧光特性的影响。

In the concentration of petroleum hydrocarbon 3g/kg and 6g/kg, Forsythia suspense had the less variation breadth of physiological characteristics and chlorophyll fluorescence parameters compared with Hydrangea paniculata and Amorpha fruticosa, and had higher tolerance to petroleum hydrocarbon stress.

石油烃含量在3g/kg土和6g/kg土2个处理中，连翘的生理指标和叶绿素荧光参数的变化幅度要小于大花水桠木和紫穗槐，对石油烃胁迫的抗性更强；石油烃含量在12g/kg土时，3种植物的生长均受到最大抑制。

Methods Radio-immunological and fluorescence methods were used to determine the amount of insulin secretion as well as content of intracellular Ca++ and cAMP by the rat islet cells incubated with amylin in different concentrations.

用放免和荧光方法分别检测经不同浓度胰淀素温育的大鼠胰岛细胞的胰岛素分泌量、细胞内Ca++及cAMP含量。

Methods: The fluorescence char acteristics of astragaloside anisic reaction product were used to determine astragaloside in serum.

利用茴香酸在硫酸介质中与黄芪甲甙反应产生强烈荧光的特性，测定血清中的黄芪甲甙。

Anthocyanidin extract in methanol showed 3 absorption peaks, at 270, 340 and 520 nm, in the UV-vis spectrum, with bathochromic and hypsochromic shift with methanol+AlCl3 and methanol+AlCl3+HCl, respectively; the ratio of the absorbance at 440 nm to that at 520 nm was 0.29. No fluorescence occurred under UV irradiance, and 5 absorption peaks occurred at 270 nm after HPLC. Five molecular ion peaks occurred on MS: 595, 381, 611, 587 and 571, respectively, and monosaccharides in the extract were identified as rhamuose and glucose on HPLC.

一品红花色素的甲醇溶液分别在270、340 和520 nm 处有 3 个吸收峰；在 440 nm 吸光度与可见光最大吸收波长 520 nm 吸光度的比值为0.29；花色素的甲醇溶液中加入AlCl3后发生红移，再加入HCl后发生蓝移；色素溶液在紫外光下无荧光；色素样品经液相色谱分离后在 270 nm检测有 5 个比较明显的吸收峰；质谱中得到 595、611、381、571 和 589 等对应的分子离子峰；花色素酸解液高效液相色谱图谱和鼠李糖、葡萄糖的出峰时间一致。

The results showed the different fluorescence property with naphthalene due to the interaction, congruence of the molecules and formation of inter- or intramolecular exciplex.;A series of dithioesters with different aromatic rings such as naphthally, anthracyl and pyrene in R groups were synthesized. The polymerizations of MMA using these dithioesters as the RAFT agents were investigated.

结果表明：在NMNDT和它获得的聚合物溶液中，由于分子间的相互作用、叠合，激发态分子与基态分子形成了激基缔合物，引起了萘环荧光的淬灭，使其发光特性与原来萘的发光特性不同；探索了二硫代酯中R基团的立体和电子等性能对MMA的RAFT聚合的影响。

The weight ratio of riboflavin and anthrone, the weight of dispersing system LDPE and the heating time is studied during making the organic luminescent films. The possibility of achieving organic WLED using ax — 17 and zq — 13 is investigated. According to the theory of linear system, a new way of calculating the efficiency of fluorescence resonance energy transfer is investigated and it is proved by experiments.

在有机白光LED方面，本文考察了有机荧光物质核黄素和蒽酮之间质量比、分散系聚乙烯质量和成膜时间对有机发光薄膜荧光光谱的影响；探讨了使用有机荧光颜料ax—17和zq—13实现有机白光LED的可能；根据线性系统理论，提出利用供体发射谱和受体激发谱的类卷积积分估算荧光共振能量传递效率的新方法，并进行了实验验证。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。