查询词典 constants

The reaction rate constants of Pb〓 with pheophytin a, pheophytin b and hydroxypheophytin a were 2. 0 mol〓 l s〓, 0.78mol〓 l s〓and 1. 86 mol〓 l s〓, respectively.

铅与叶绿素a直接进行反应的结果显示：铅并不能取代叶绿素中的镁生成铅叶绿素。

Finally, a comprehensive model was proposed to elucidate the main characteristics and essential time constants of the cis/trans photoisomerization processes among the three 1,4-distyrylbenzene isomers.

最后，我们提出一套完整的动力学模型来描述对-二苯乙烯基苯的顺-反异构化的特徵及其异构化的速率。

In the second chapter, the definition of pointwise constants and their equivalent representations are introduced.

本文第二部分引入了两种意义下的点态非方常数的定义，并给出了它的等价表达形式。

A new polarographic method is applied to determine stability constants of metal complexes.

介绍了一种用于金属络合物体系多级稳定常数测定的新型极谱研究方法。

The coupled model is more sensitive to phytoplankton maximum growth rate, respiration rate, death rate and zooplankton grazing rate, while other parameters such as half saturation constants and remineralization rate are insensitive ones.

虽然，从表面上来看，模型对垂向扩散系数的敏感度不大，但由于目前的湍封闭模型，尚不能很好地刻画扩散系数复杂的时间变化，这势必对生态系统的模拟有着较强的不确定性。

The dependence of structural parameters including lattice constants, rhombohedral angle, and atomic coordinates on pressure was also studied.

对锗R8相结构参数的压力依赖性也进行了研究，包括晶格常数、伞状角、原子位置参数随压力的变化情况。

The force constants and spectroscopic data have also been worked out.

在此基础上计算出了力常数和光谱数据。

As to the stannic oxidation by oxidants, we have studied the microscopic mechanism and kinetics of stannic oxidation by HOCl, HCl, OCl, OCl〓 and NO〓, and calculated the rate constants of them to enrich the database for there are still no the corresponding experimental data at present.

对煤燃烧过程中锡生成氧化物和氯化物的机理及其氧化物转化成氯化物的生成机理与反应动力学的研究结果也是充实该方面的数据库建设。

To determine the rate constants of oxidation reaction between sodium formaldehyde sulfoxylate and oxygen in aqueous solutions at different pH values, different temperatures, different buffer concentrations and different dissolved oxygen concentrations.

考查在不同PH值，不同缓冲液浓度，不同温度，不同溶解氧浓度的条件下甲醛合次硫酸氢钠在水溶液中与氧反应的反应动力学特征。

By using microcalorimetric method, the growth thermogenetic curves of Rhizopus nigricans inhibited by four kinds of heavy metal ions are determined, parameters such as growth rate constants k, inhibitory ratio I, and half inhibitory concentration IC 50 etc.

用微量热法测定了Cu~(2+)，Cd~(2+)，Hg~(2+)，Pb~(2+)等四种重金属离子对黑根霉菌生长抑制的产热曲线，得到了黑根霉菌在不同条件下的生长速率常数k，抑制率I，半抑制浓度IC_(50)等参数。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。