扩散性的

The most important character of such a problem is that the vapor makes not only a bulk motion under the pressure gradient with the whole gas phase together, but also a diffusive motion relativing to the incondensable gas.

这类问题的主要特点是蒸汽不仅随着不凝性气体在压力梯度的驱动下做整体运动，还有相对于蒸汽相对于整体运动的扩散运动。

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。

The concentrations and pH values of scopoletin solution had no distinctive effect on the absorption kinetics. The absorption of scopoletin was a first-order process with passive diffusion mechanism. Scopoletin was well absorbed at stomachs and intestines in rats. Colon was the best absorption site of scopoletin, which suggest that a sustained-release preparation should be suitable for this compound.

不同质量浓度、pH对东莨菪素在大鼠全肠道的吸收没有显著性影响，药物的吸收呈一级动力学过程，吸收机制主要为被动扩散；东莨菪素在胃肠道均有较好的吸收，结肠为最佳吸收部位，提示适宜制成缓控释制剂。

The results showed that under the given experimental conditions,the surface layer with richiron and poor copper was formed in the surface worn region of the semimetallic friction material,the depth of organic ingredient pyrolysis caused by friction heat in worn surfaces was atout 0.35mm; the semimetallic friction material containing 15%-20%of Cu had better wear-resistance,and can form a even and continuous transfer film of copper; crack peeling was the importantmechanism of the counterpart.

半金属摩擦材料具有摩擦系数稳定，耐磨性好，对环境污染小和对偶件表面损伤小等优点，但其在摩擦热和界面应力等因素作用下，表层会发生弹性变形，塑性变形，元素扩散，组分转移和摩擦化学反应等现象，因此，利用扫描电子显微镜X射线能量色散谱和差热－热重分析，对铜纤维增强的半金属摩擦材料与灰铸铁滑动摩擦表面层的特性作了分析研究，考察了表面层特性对摩擦损行为的影响。

Methods. PSF 1000 analyzer was used to measure retinal image quality for eye of 26 subjects (spherical ranged from –3.00 ~-6.00Ds, astigmatism ranged from –0.75~-3.00Dc) fitted with three forms of full correction in random order : unaided eye, with rigid gas permeable contact lenses and toric soft contact lenses. The modulation transfer function curve was observed, 12 points of the MTF curve ( equivalent 12 points of LogMar VA) was used for analysis. Results.

利用人眼点扩散函数分析系统（PSF-1000）检查和评估26例近视散光患者（年龄18~28岁，球镜–3.00DS~-6.00 DS，角膜散光-0.75DC ~-3.00DC）在裸眼、配戴散光软性角膜接触镜和透氧性硬性角膜接触镜三种全矫状态的光学成像质量，采用26眼屈光介质MTF曲线中的12个点（即分别等同于对数视力表4.0~5.1的12个点）进行比较和统计学分析，为了避免主观误差，三种矫正方式的先后顺序随机选择。

Methods Fifty F-344 rats were divided into four groups, GM only、PAA+GM、PAA only and saline control. ABR thresholds at different frequencies were measured at different times and hair cell losses were numerated. Two-dimensional diffusion assays in the culture medium were performed to evaluate the effect of PAA on the antimicrobial activity.

选用健康F-344大鼠50只，随机分4组：Ⅰ为GM、Ⅱ为PAA+GM、Ⅲ为PAA、Ⅳ为生理盐水对照组；通过观测4组大鼠不同时期、不同频率听性脑干反应（auditory brainstem respons，ABR）阈值的改变；计数耳蜗毛细胞死亡率，以观察PAA对F-344大鼠GM耳蜗毒性的拮抗作用；用双向扩散血清培养基检测法观察PAA 对 GM 抗菌活性的影响。

The corresponding micromorphologic changes at early stage included swelling of mitochondria and endoplasmic reticulum cisternae.

在缺血早期血脑屏障破坏的逐渐加重及间质性水肿的出现未引起缺血区水分子扩散的明显改变。

Enshi fire officers and men arrived at the scene, according to xylene has a high flash point, flammable, toxic, volatile and not soluble in water features, on-site incident commander ordered fire engines parked in the area upwind direction.

当日凌晨3时46分，沪渝高速宜昌往恩施方向崔坝服务区2公里处一辆载有二甲苯的槽罐车发生侧翻，二甲苯随即泄漏出来，带有浓烈刺激性气味的二甲苯在现场扩散。4时54分，恩施消防官兵到达现场，根据二甲苯具有高闪点、易燃、有毒、有挥发性且不溶于水的特点，现场指挥员命令消防车停靠在事故区上风方向。

The diffusion and cross—linking of polymer chains for blend latex particles were investigated by measurement of gel content,swell ratio and FTIR.The influences of different core／shell structure of blend latexes on mechanical properties of the films were described.

通过胶膜的凝胶率和膨胀率的测定和红外光谱分析对反应性复合乳液中乳胶粒子的扩散及交联反应进行了研究，并探讨了不同核壳结构复合乳液对涂膜机械性能的影响。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失