Electron exchange between two atoms in excited states and bond cleavage under bond oxygen or oxygen primary with argon ion bombardment are also important surface ionization processes other than the direct ionization of atoms in the surface layers. 通过对离子轰击下固体表面电离过程重新考虑认为,在固体表面覆氧或氧离子轰击下除表面原子的直接电离外,激发态双原子间电子交换和断键亦起重要作用。
The percentage of desorption ionization and the stability of primary structure of angiotensin ⅰ( An ⅰ) were studied using different laser intensities with matrix-assisted laser desorption/ ionization time-of-flight mass spectrometry. 选用基质辅助激光解吸离子化飞行时间质谱技术研究不同激光强度对猪血管紧张肽(AngiotensinⅠ,AnⅠ)解吸离子化的百分率和一级结构的稳定性。
The primary ionization constant K_ ( a) of phthalic acid at different temperatures was calculated. The hydrolysis reaction order α and rate constant k were evaluated. 由水解结束时溶液的平衡浓度与此时溶液的pH值,计算了不同温度下邻苯二甲酸的一级电离常数Ka,从而确定了水解反应级数α和不同温度下反应速率常数k。