粒子

The truncated icosahedra have been prepared for the first time by prolonging the reaction time to 4 h.The XRD,SEM,TEM and Uv-vis technologies confirm the high shape difference between icosahedral gold nanocrystals and their truncated forms.

通过延长反应时间合成了一种类似足球的新型金纳米粒子—截角二十面体，研究结果表明，该粒子由二十个六边形和十二个五边形组成，截角面是{100}面。

The growth of truncated icosahedra could be induced and maintained through interplay of following processes:the～50 nm multiple twinned seeds were generated; shape and size focused by Ostwald ripening,then oxidativly etched and preferentially grew on the {100} face.Oxidative etching plays an important role in the formation of gold nanocrystals on hydrothermal condition.

对二十面体金纳米粒子及截角二十面体的生长机理进行了探讨，考察了不同刻蚀程度对金纳米粒子的形态影响，研究结果表明，增强体系刻蚀程度有利于单晶的生长，减弱刻蚀程度有利于孪晶的生长。

The results showed: Composites showed microstructure of EP coating ultramicro iron, which could enhance the ability of antioxidation of composites.

研究结果表明：复合粒子结构为EP包裹超微铁核壳结构，该结构提高了复合粒子的抗氧化能力。

The results showed: Composites had better compactness than composites of ultramicro iron-coated hollow glass bead.

结果表明：此复合粒子较中空玻珠/超微铁复合粒子有更好的致密性。

Composites of hollow glass bead /ultramicro iron/ EP with three-layer structure were prepared by coating EP on the surface of composites of ultramicro iron-coated hollow glass bead.

通过在超微铁包裹中空玻珠复合粒子表面再包裹一层EP，制备出了中空玻珠/超微铁/EP三层结构复合粒子。

Calculations show that the isospin effects on particle emission have a strong dependence on the angular momentum.

高的角动量不但弱化了同位旋对粒子蒸发的影响，而且也降低了核耗散对粒子发射的影响。

Large angular momentum greatly weakens the influence of nuclear dissipation and isospin on particle emission.

高的角动量不但弱化了同位旋对粒子蒸发的影响，而且也降低了核耗散对粒子发射的影响。

In the "indirect" process, first observed in neutral kaon particles in 1964, quantum mechanics allows particles to change into their antiparticles and back again in a process known as "mixing". In 2001, The BaBar team, working at the Stanford Linear Accelerator -- and independently the Belle collaboration at the KEK laboratory in Japan -- were the first experiments to detect this in a B meson. BaBar observed "direct" CP violation in 2004 by showing that the number of decays observed for B mesons was higher than for their antiparticle equivalents.

在&间接&过程中，量子力学允许粒子在一种被称为&混合&的过程中，在自身与其反粒子之间相互转变。1964年人们第一次在中性K介子上观测到这种现象。2001年，在斯坦福直线加速器中心工作的BaBar研究组和另一个日本高能加速器研究中心的Belle研究小组各自独立地第一次在实验中观测到这种现象发生在B介子上。2004年，BaBar小组观测到了&直接&电荷宇称不守恒，他们发现观察到的B介子的衰变数量要高于其对应的反物质。

Polystyrene-co-acrylate emulsions were polymerized and applied to reinforce the filter paper. The latex particles with different morphological structure were prepared through controlling the polymerization and the structure of the particles was investigated by transmission electron microscopy.

摘 要：在自制苯丙共聚乳液过程中，通过控制聚合工艺，使共聚乳液中的乳胶粒子具有不同的形态结构，并采用透射电镜对乳胶粒子的形态结构进行了表征。

The science that has found many of the answers to that profound and age-old question is particle physics: the study of those impossibly tiny particles with unbelievably strange names: bosons and leptons, quarks and neutrinos.

科学家们已经发现，能解开一些深奥而古老谜团的就是粒子物理学--它研究那些体积难以置信地小、名字不可思议地怪异的微小粒子：玻色子、轻子、夸克和中微子。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。