质子

Finally, the proton transfer mechanisms of composite membranes were discussed.

最后对复合膜的质子传递机理进行了讨论。

As a model peptide, Arg-Tyr-AcOH was also investigated in its interaction with deprotonated radical cations of purine.

作为肽的模型，对Arg-Tyr-AcOH与脱质子的嘌呤自由基之间的相互作用也进行了研究。

These properties were also decreased owing to the protonation of the pyridine ring.

这些性质也由于吡啶的质子化而减小。

The charm quark is roughly one and a half times the mass of the proton.

粲夸克的质量大约为质子质量的1.5倍。

The experiments showed that quark spins make up less than 30 percent of the proton's spin.

为了解决这一"自旋危机"，物理学家开始检验其他可以产生自旋的因素，比如将压克粘在一起的胶子、夸克在质子内部的轨道运动，以及瞬间出现的虚夸克等。

By analyzing experimental results, a kinetic model for the evolution of color centers in quartz glass irradiated with protons is proposed, and the change in optical density can be given.

根据对试验结果的分析，建立了低能质子辐照下石英玻璃色心演化的动力学模型，并给出了光密度变化的表达式。

I didn't know what a proton was, or a protein, didn't know a quark from a quasar, didn't understand how geologists could look at a layer of rock on a canyon wall and tell you how old it was, didn't know anything really.

我不知道什么是质子，什么是蛋白质，什么是类星体的夸克。我不明白地质学家是如何通过观察峡谷的岩石层猜出它的年龄。我真的是什么都不知道。

The excited-state intramolecular proton transfer tautomerism reaction of 6-methyl-4-hydroxy pyri-midine monomers and dimmers was investigated by the ab initio method with the self-consistent reaction field with Tomas's polarized continuum mode and CIS theories at HF level on the basis of 6-311+G* and 6-31G basis set. By studying the potential energy surface, it was found that the monomer's ground-state proton transfer process together with the excited-state proton transfer process is a molecular system of four energy level, but dimmers were not, which can be used to explain the fact that UV-visible absorption and fluorescence spectra of monomer and dimers all corresponded to quinoid.

采用 ab initio HF理论的组态相关CIS方法和连续溶剂模型PCM，分别在6-311+G*和6-31G水平上研究了6-甲基-4-羟基嘧啶单体及二聚体激发态质子转移的异构化反应；对其反应势能面的研究发现，单体基态和激发态的异构化反应一起可以形成四能级的分子电子体系，而二聚体的却不能，由此解释了单体和二聚体的紫外吸收光谱和荧光发射光谱均对应于酮式构型的原因。

Among of them, Radio-frequency ion source is in most wide used for the reasons of its high proton content, long life and reliable performance, etc.

其中，高频离子源以其很高的质子比（70％-90％）、长寿命和可靠的性能而得到了最广泛的应用。

Radioactive nucleus beam ; light charged particles ; isospin ; proton halo

放射性核束；轻带电粒子；同位旋；质子晕

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。