查询词典 positron

In this thesis, we investi-gated some typical production processes related to chargino and neutralino viaelectron-positron, photon-photon and hadron-hadron collision at futural Linear Colliders and Large Hadron Colliders, and gave the analysis and discussion of both the radiative corrections and CP violating effects. To reach the required precision, we performed the calculation beyond the tree level. From the calculation we can conclude that the physical signals arising from charginos and neutralinos are considerable, both in direct production and indirect search process.

在本文中，我们研究了在未来的直线加速器和大型强子对撞机上通过电子正电子、光子光子和强子强子对撞与chargino，neutralino相关的一些典型过程，并给出了辐射修正和CP破坏效应的分析讨论，为了达到所要求的足够的精度，我们进行了树图阶以上的计算，通过计算我们可以得出结论，无论是直接产生还是间接寻找过程，来自chargino和neutralino的物理信号都将是显著的。

The study was conceived when Dr Mayberg discovered, using a brain-scanning technique called positron-emission tomography, that an area of the brain called the sub genual cingulate is overactive in patients with depression. This got her thinking.

当梅博格医生用一种叫正电子喷射 X 线断层摄影术的大脑扫描技术时，她就认为大脑中一块叫做低膝带状环绕组织的不为在抑郁症患者中表现异常活跃。

If an additive of B less than 1.37 at.-%, some of B atoms solid-dissolved interstitially into matrix and distorted the lattice, thus the lifetime of positron in matrix dilated; the others of them segregated on vacancy-like defects and formed" filling effect", thus the mean lifetime and S parameters decreased. If B added up to 2.22 at.

在Ni_3Al合金中加入少量硼(≤1.37％)时，一部分硼原子以间隙方式溶解到基体中，使晶格发生畸变，导致基体中正电子寿命增长；另一部分硼偏聚到空位型缺陷上，产生&填充效应&，导致平均寿命■和S参数下降。

On the basis of the avidity of lesional macrophages for polysaccharide-containing supramolecular structures such as nanoparticles, we have developed a new positron emission tomography agent with optimized pharmacokinetics to allow in vivo imaging at tracer concentrations.

在伤害性巨噬细胞对含多糖的超分子结构如纳米粒子的亲和力的基础之上，我们开发了一种新的正电子发射断层成像剂，该成像剂在示踪物浓度水平进行体内成像方面具有最佳药代动力学特征。

Positron spectroscopy is a new and sensitive microanalytical probe for characterization of polymer microstructures.

文摘：简要介绍了近年来正电子谱学在聚合物微结构研究中的主要应用及进展。

The defects and electronic momenta in graphite and nanocrystalline carbon have been studied by positron annihilation techniques.

用正电子湮没技术研究了石墨和纳米碳中的缺陷和电子动量。

Using 11C--PK11195 positron emission tomography, we investigated microglial activation in HD presymptomatic gene carriers, its relationship with striatal neuronal dysfunction measured with 11C-raclopride PET, and the role of PK PET as a possible marker of subclinical disease progression in PGCs. Eleven HD PGCs underwent PK and RAC PET. Their results were compared with those of healthy controls.

利用11C--PK11195电子发射断层扫描，我们研究了HD的基因携带者症状发生前小神经胶质细胞的活化情况，它与纹状体的神经元的机能障碍的关系，以及PET可能作为PGCs亚临床症状进展的指标。11位HDPGCs接受了PK和RACPET检查，其结果与健康对照人群进行比较。

Copper pyruvaldehyde bis（N -methylthiosemicarbazone） complex, or Cu-PTSM, belonging to a class of neutral, lipophilic complexes ,is a positron emission tomography radiopharmaceutical that can be used to evaluate blood flow in the heart, brain, and tumors without following any side effect .

Cu-PTSM是中性亲脂性复合物，用于PET显像的放射性药物由于该制剂很容易扩散到细胞内，因此注射Cu-PTSM后可以了解心、脑和肿瘤部位的血流灌注状况，它不伴有副反应的发生，且合成比较容易，所以是一种非常有途的新型PET显像剂。

copper pyruvaldehyde bis（n -methylthiosemicarbazone） complex, or cu-ptsm, belonging to a class of neutral, lipophilic complexes ,is a positron emission tomography radiopharmaceutical that can be used to evaluate blood flow in the heart, brain, and tumors without following any side effect .cu-ptsm has been demonstrated the ability of rapid diffusion into cells.also because it can be synthesized,it is a potential tracer for pet imaging.

作者单位：610041 四川成都，四川大学华西医院核医学科 cu-ptsm是一种中性亲脂性复合物，用于pet显像的放射性药物。由于该制剂很容易扩散到细胞内，因此注射cu-ptsm后可以了解心、脑和肿瘤部位的血流灌注状况，它不伴有副反应的发生，且合成比较容易，所以是一种非常有前途的新型pet显像剂。

Imaging of SERT with positron emission tomography and single photon emission computed tomography in humans can provide an important tool for understanding the relationship of psychiatric disorders and the alterations in SERT density, as well as to monitor the treatment of patients.

SERT的正电子发射断层和单光子发射断层活体显像剂有助于研究该系统的变化与精神紊乱疾病的关系，以及精神紊乱病人疗效的监测。

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％。