查询词典 ionization potential

Electrospray ionization tandem mass spectrometry was applied to study fragmentation pathways of 18 kinds of α-amino acids in positive and negative ion mode.

用串联质谱法研究了18种常见氨基酸在正离子和负离子模式下的质谱碎裂规律。

Electrospay ionization source was applied and operated in both positive and negative ion modes.

目的：建立快速、准确、高灵敏度的中成药中非法添加西地那非的检测方法。

Direct infusion electrospray ionization quadrupole time-of-flight mass spectrometry was applied to analysis sixteen compounds from traditional Chinese medicines.

采用直接输注电喷雾电离质谱对十六种中药来源的化合物进行了分析。

In this way,the increase of X quanta will lead to a error of the K shell ionization cross sections.

当靶的厚度增加到一定程度时，会使X光量子数增加，最终导致K壳层电离截面的实验误差。

We can realize completely efficiency ionization probability under the condition of low Rabi frequencies by employing lower power and time-delayed laser pulse.

采用两脉冲之间具有一定延迟的驱动和探测激光场，可以实现在较低Rabi频率情况下粒子的全部高效率电离。

The variation of pH and conductivity of various phosphate solution with the solution temperature were obtained based on the physical chemistry theory and ionization equilibrium theory in electrolytic solutions, and be testified experimentally under radiation of ultrasonic wave. The pH was a linear function with the reciprocal of thermodynamic temperature, and the conductivity was a linear function with the temperature in phosphate solution.

三、超声波对双水相系统组成物质、两相组成及溶质分配影响的研究根据物理化学原理和电解质溶液电离平衡理论分析推导和实验验证，揭示了超声波作用下不同组成磷酸盐溶液的pH值和电导率随溶液主体温度变化的规律：磷酸盐溶液的pH值与溶液主体绝对温度的倒数成线性关系，磷酸盐溶液的电导率与溶液主体温度成线性关系。

A second method watches for another effect of the recoiling nucleus: ionization.

探测器使用的第二种方法，是观察反冲原子核的另一种效应：游离。

Photoelectrons ejected from the surface of a stainless steel target under irradiation of a pulsed laser beam can be used to excite and to ionize the gas species in the ionization zone, which is between the extractor and the repeller plates.

当不锈钢靶表面被一束超短脉冲激光束照射时就会产生光电子，用这些光电子轰击TOF质谱电离区中的气体使其电离。

In Chapter 5,the pyrolysis of substituted six-membered ring model compound 4-methyl pyridine has been investigated.Instead of detail theoretical analysis of the reaction mechanism,the general results have been proposed from the products distribution and the combination of the pyrolysis investigation of its analogous pyridine.The major products are H_2,C_2H_2,C_4H_2,C_3H_3N and HCN,here HCN is not a primary initial product at low extent of decomposition.The mole fraction profiles of products have been obtained from the near threshold ionization.The pyrolysis of 4-methyl pyridine is initiated from the methyl abstraction and hydrogen abstraction procedures which are associated with the understanding of the soot formation and the NOX precursor correspondingly.

主要产物为H_2，C_2H_2，C_4H_2，C_3H_3N和HCN，其中HCN为非低温时的热解产物；通过近阈值电离并导出物种随温度变化的摩尔分数曲线，更详细地定量地描述了产物随温度的变化。4-甲基吡啶热解主要从母体脱甲基和脱氢两个初始反应出发，一种趋势是形成大质量数的苯并或杂环的多环化合物，有助于了解炭黑形成过程中的复杂化学过程；另一趋势是开环生成小的碳氢和腈类物质，实验得出的含氮物质的种类及随温度变化有助于了解NO_x的前驱物质的形成及其变化规律。

This dissertation is dedicated to investigate the pyrolysis of the fuel-bonded nitrogen model compounds,including five-membered ring nitrogen model compound pyrrole and the substituted six-membered ring nitrogen compound 4-methyl pyridine,with vacuum ultraviolet single-photon ionization combined with molecular beam mass spectrometry technique.

本论文利用同步辐射真空紫外单光子电离、分子束取样和反射式飞行时间质谱相结合的技术研究了含氮杂环模型化合物的热解，包括五元环含氮体系、六元环含氮体系和替代的六元环含氮体系(4-甲基吡啶)。

In this new architectural plan the Garden of Golgotha came to be at the centre of the new city.

Aelia 是高举他自己，并在此城内朝拜罗马诸神。

The continuous nature of peat accumulation means that terrestrial coaly rocks may provide a higher resolution and more complete record of base-level change than the time-equivalent shallow-marine strata, thus enabling the identification of highfrequency cycles that are not recorded in themarine strata.

泥炭积累的持续性质的手段，陆地coaly岩石可提供较高的分辨率和更完整的记录基准面变化的影响时，相当于浅海阶层，从而使确定的高频周期，不记录在themarine 阶层。