查询词典 proton

Healthy adults ; Chinese ; precentral gyrus ; proton magnetic resonance spectroscopy

健康成人；中国；质子磁共振波谱；中央前回

Key Words Proton magnetic resonance spectroscopy, Precentral gyrus, Amyotrophic lateral sclerosis

磁共振波谱分析：采用Siemens Sonata 1.5T 磁共振成像、波谱分析一体化系统。

From this point of view, we investigate the effect of the curvature energy and the compressibility energy on the emission of the prescission particle. The effect, acting together with the other one that the lower emission barrier facilitates the particle emission, leads to a different way to emit proton and α particle.

从这个角度，笔者研究了引入曲率能和压缩能影响断前粒子发射的效应，与发射位垒降低增强断前粒子发射的效应相作用，使断前质子和断前α粒子在基态到鞍点间出现了不同的发射规律。

Excitation functions of neutron, proton and α particle emission prior to scission measured in the reactions 28 Si+ 164,167,170 Er→ 192,195,198 Pb are studied using an extensive fission diffusion model and it is found that the model can well describe the trend of particle multiplicities of Pb isotopes measured experimentally as a function of the bombarding energy,which indicates the existence of isotope effects in prescission particle emission.

用推广的裂变扩散模型研究了2 8Si+16 4，16 7，170 Er→192 ，195，198Pb反应中测量的断前中子、质子和α粒子多重性的激发函数。发现扩散模型能很好地拟合这些轻粒子多重性随裂变系统激发能和Pb同位素的变化趋势。表明断前粒子发射存在一个同位素效应。进而在一个考虑了裂变过程中摩擦效应的统计模型的框架内，在In和Er这两个元素的同位素链中，考察了同位素效应与裂变碎片质量不对称性和裂变系统尺度的关系。计算结果表明：同位素效应的存在不依赖于裂变系统的大小和不对称性。此外，当裂变系统具有高的中质比时，轻带电粒子发射将不再敏感于裂变延迟时间的长短，而中子发射则非常敏感。

A brief overview of current development in protonic ceramic membrane fuel cells with high temperature proton-conducting electrolytes is given, which points out that the poor chemical stability of traditional electrolyte materials for the protonic ceramic membrane fuel cell is the main obstacle for their applications.

本文介绍了以高温质子导体为电解质的质子陶瓷膜燃料电池的进展，指出传统质子陶瓷膜燃料电池较差的化学稳定性是阻碍其发展的重要因素。

The present development of high temperature proton conductors with high chemical stability as electrolyte materials for protonic ceramic membrane fuel cells is reviewed, as well as the influence of novel element doping strategies on the chemical stability, ionic conductivity and sinterability for BaCeO3-based materials.

重点评述了近期化学稳定性好的高温质子导体电解质材料的发展以及新的掺杂体系对于经典BaCeO3基质子导体在化学稳定性、电导率和烧结活性等方面的作用，分析了高温质子导体作为电解质材料在质子陶瓷膜燃料电池发展中存在的问题和发展的方向。

All study subjects underwent a physical and neurologic examination, psychiatric review, laboratory blood studies, and psychoneurological testing. T2- weighted brain magnetic resonance imaging and proton density scans were used to measure aggregate WMH volume.

Schretlen医师和同事最近的研究着眼于65岁以上成人血清UA与认知功能之间的关系，在测量行进速度、语言记忆以及操作记忆时，发现那些UA值高于正常值者，在研究对象中位于最低之四分位的机会高出2.7到5.9倍。

The largest chemical shifts were observed for the proton 1.48 ppm adjacent to the central pyridinium ring and para-protons 1.47 ppm with respect to the nitrogen of pyridinium.

在最终的亲核加成化合物2-F的芳香族区中的这些化学位移与9，10二氢-9-甲氧基-9-(4甲氧基苯基)-10-甲基吖啶的对应物是一致的，17b 这被证明是与过量的MeOH形成的9-苯基吖啶盐的加成化合物（支持信息中的图S7）。

The largest chemical shifts were observed for the proton 1.48 ppm adjacent to the central pyridinium ring and para-protons 1.47 ppm with respect to the nitrogen of pyridinium.

对于与中心吡啶环相邻的质子（ΔHa=1.48ppm）以及相对于吡啶的氮的对位质子（（ΔHc=1.47ppm）观察到了最大的化学位移。

The energy of the complex molecule has been compensated by a hydrogen bond formed by, a proton bonding to a quinolyl nitrogen atom and a nitrate ion.

分子中有一个氢离子与另一个喹啉N原子结合并与硝酸根的氧原子形成氢键，从而使配合物分子在能量上得到补偿。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。