查询词典 dissociation

LaNi〓 can be easily activated at room temperature and activated LaNi〓 possesses catalysing effect for the dissociation of H〓, which greatly reduces the energy barrier for dissociation of H〓. Hydrogen passed through LaNi〓 particles, then diffused into the crystal lattices of V、Nb and TiFe alloy and formed hydrogenate.

LaNi〓粒子在室温下很容易活化，活化后的LaNi〓具有了氢分子分解为氢原子的催化作用，降低了氢分子分解为氢原子所必须克服的势垒，氢通过LaNi〓粒子而进入V、Nb、TiFe合金晶格中，形成金属氢化物。

Several transient compounds were synthesized by the homo- and heterogeneous reactions of reactive halogen compounds, In-situ ultraviolet photoelectron spectroscopy and photoionization mass spectroscopy as well as theoretical calculations were used to study their molecular structures, stability and molecular orbital properties, their electronic structures and geometric structures were obtained for the first time; Simultaneously, the electronic structure and thermal dissociation of acetyl peroxynitrate and trifluoroacetyl peroxynitrate which have great importance in the atmospheric chemistry were studied; The substituent effects of series of halopyridines and halothiophenes were studied by the ultraviolet photoelectron spectroscopy method for the first time. The atmospheric chemical reaction between peroxyacetyl radicals with IO radicals as well as the dissociation of the most stable isomer of CH3COIO3 were calculated by density functional theory, it was found that the CH3COOIO2 isomer may be act as a new reservoir of inorganic iodine in the stratosphere.

通过活性卤素的系列均相与非均相化学反应合成了几种瞬态物种，采用原位紫外光电子能谱和光电离质谱结合量子化学理论计算对化合物的分子结构、稳定性以及分子轨道特性进行了研究，首次获得了这些物种的电子结构和几何结构的信息；同时研究了大气中有重要作用的乙酰过氧硝酸酯和三氟乙酰过氧硝酸酯的电子结构性质及热解过程；采用紫外光电子能谱手段首次研究了系列卤代吡啶和噻吩的取代基效应；通过量子化学理论计算研究了乙酰基过氧自由基与IO自由基的大气化学反应及其最稳定异构体CH3COOIO2的解离，发现该物种可能是无机碘化合物在平流层中的储库物种。

In this paper, using REMPI-TOF technique, multiphoton dissociation/ionization of sulfur and carbon contained polyatomic molecule has been carried out. The mechanism ofmultiphoton dissociation/ionization was discussed, and some valuable results are obtained. The paper has six chapters.

本论文用共振增强多光子电离-时间飞行质谱等实验技术研究了二硫化碳、甲醇和乙醛分子的多光子解离或电离的动力学过程，对多光子解离或电离产物的产生机理进行了分析和讨论，得到了一些有意义的实验结果。

If α had been determined,the dissociation and non-dissociation species photolysis rate constants could be calculated by the tangent equation of the power function.

任意解离度条件下的解离态和非解离态光解速率常数，可根据幂函数的切线方程来确定。

Results In contrast with enzymatic dissociation, the method of mechanical dissociation, breaking up great neurospheres into small spheres with gradually reduced pipette, had advantages of raising cell viability and shortening cell doubling time (P.05). After NSCs being cultured long term in vitro, the number of neurons generated decreased with passaging, whereas the number of astrocytes increased.

体外长期培养条件下，随着培养时间的延长，NSCs分化为神经元的比例逐渐降低，星形胶质细胞的比例逐渐增高；在4~12代NSCs分化为神经元的能力表现出下降的趋势，但仍较为稳定；12代后，神经元的分化比例迅速下降，星形胶质细胞的比例迅速上升。

Compared with other advanced techniques employed in cognitive neuroscience, studies on brain-damaged patients have a long history and unique contribution to the field Specifically, the selective disruption of some task performance signifies the functional independence of a cognitive component subserving that task. The double dissociation between two functions further suggests the dissociation, possibly both functionally and anatomically, of two components.

某些脑伤病人的选择性认知能力损伤，说明了和该作业相关的认知成分在功能上的独立；两个功能的双重分离，更显示其组成成分可能在行为功能和生理解剖上有不同的机制，以致其中一者单独被脑伤所影响、而另一者则保存完整。

The following results were obtained.(1) The dissociation of some LHCⅡs from PSⅡ complex occurred after saturating illumination, but FSBA treatment inhibited the dissociation as shown by analysis of sucrose density gradient centrifugation and low-temperature (77K) chlorophyll fluorescence.(2) A significant increase in Fo and decrease in Fv/Fm occurred after saturating illumination, and the two parameters could largely recover to the levels of dark-adapted leaves after subsequent 3 h in the dark, but they could not recover when FSBA existed during saturating illumination.

获得如下结果：（1）饱和光照明可以引起部分LHCⅡ从PSⅡ核心复合体上脱离，但FSBA处理可以抑制LHCⅡ脱离；（2）大豆叶片经过3小时饱和光处理后，初始荧光Fo明显升高，而PSⅡ光化学效率Fv／Fm显著降低，但经过随后3小时暗恢复后，Fo和Fv／Fm基本可以恢复到初始暗对照的水平，而FSBA处理增大它们的变化程度，并且放置暗中3小时后不能恢复。

It is demonstrated in the calculation that Park's two-temperature model underestimates the nonequilibrium dissociation rate coefficient and that Hansen's two-temperature model overestimates the nonequilibrium dissociation rate coefficient.

结果显示Park的双温度模型低估了非平衡解离速率系数，而Hansen的双温度模型则高估了非平衡解离速率系数。

The calculated results of the vibrational relaxation time, the dissociation incubation time and the dissociation rate coefficient are found to be in a good agreement with those experimental data given by Camac and Wray, respectively.

解离孕育时间和解离速率系数与Wray的实验结果相符，振动弛豫时间与Camac的实验结果相比合理一致。

He consistance of the population dissociation coefficient method andthe sample dissociation coefficient method for the calculation of structural reliabilityin solid rocket motors was reviewed.

依据结构强度－工作应力理论模型，应用数理统计方法和对某团体发动机大量试验数据的实例计算，证明了总体变异系数法和样本变异系数法在结构可靠性计算中的一致性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。