空泡形成

The CFD method was applied to calculate and simulate the form and action process of the cavitation at the representative character of the cavitation erosion on the surface of the hydraulic turbines.Some argumentation was presented that micro jet impacted the wall with a certain degree when bubble collapsed with the result that the maximal strain of the wall annularly distributed the local of the boundary touching the micro jet.Cavitation was gradual to develop regionally at the mode of chain reaction and di...

针对水轮机叶片表面气蚀的典型特征，利用CFD方法进行仿真计算，模拟气蚀形成和作用过程；根据模拟计算结果提出了新观点：空泡溃灭发生微射流以一定的倾角冲击壁面，壁面材料产生的最大应变在流束边界局部区域，呈环状分布；空泡气蚀在局部区域是渐进的，以"连锁反应"形式扩展，具有一定过流环境的分布特征；典型的冲蚀缺陷形貌是空泡气蚀在不同阶段的产物。

Results: electronic microscope showed that in prednisone group heterochromatin increased in some cells, entoblast was not obvious in some cells, fat drops were small and few, mitochondria vacuole were common, and myelin figure was found in smooth endoplamic reticulum. the ultrastructure in yc group was almost normal and megamitochondrion formation was common. a large amount of fat drops were found in cytoplasm in gw group and little improvement was found compared with that in prednisone group.

结果： 电镜结果显示：激素组个别细胞异染色质增多，核仁不明显，脂滴显著变小变少，线粒体空泡化常见，有滑面内质网髓鞘样结构形成；养阴组电镜结构基本正常，其特征是细胞内有较多的巨大线粒体形成；桂附组较激素组改善不明显，其特征是胞质内可见大量脂滴。

With a cavitating model established for N-S equations from cavitation theory, cavitation evolution on the surface of a hydrofoil is developed: incipience of cavity, cavity growing, reentrant flow appearing, cavity retracting, shedding and smaller broken cavities moving downwards with the main flow.

根据空化流原理，建立了基于N-S方程求解的空化模型，利用这个模型计算了空化在翼型表面的演化过程：初生、长大、形成回注水流、空穴回缩、减小、脱落，以及小空泡随主流向下游运动的现象。

The process involves extension and invagination of the plasma membrane to form small vesicles in pinocytosis or vacuoles in phagocytosis.

胞饮作用形成小泡囊，胞噬作用形成空泡。

As shown under TEM, young cleistothecia interwoven by vegetative hypha are composed a mass of ascogenous hypha which presented binuclei and, most of all, a plenty of organelles, cspecially β-glycogen, polyribosome, lomasomes,...

它们与细胞分化、胞壁形成、质膜和核膜的构建密切相关。在子囊形成时，这种特殊结构逐渐减少和消失，并见大量球形颗粒和空泡，后者可能与子囊胞质胞裂、孢子形成有关。

It was observed by means of electronic microscope that toxinresulted in the apparent change in ultrastructure of rapeseed leafincluding the damage of chloroplast membrane,dilated,disorderedgrana lamellae;the damage of mitochondria membrance andeventually vacuolated mitochondria;the contract of cell nuclein.

电镜观察发现：菌核菌产生的毒素引起油菜叶片超显微结构显著变化，主要包括叶绿体膜破坏，基质片层肿胀，排列紊乱，形成空腔，最终叶绿体解体；线粒体膜破坏，最后空泡化；细胞核质凝缩。

Results After onset of reperfusion, the adhesion of platelet to endothelia was observed at veins of pial vessel. they distributed as tiny spots, 30～60 minutes after reperfusion, we observed the vacuole formation in endothelial cells of artery and thrombosis could be seen at the injurious area.

结果 再灌注后即刻，软脑膜细静脉内有白细胞和血小板粘附，呈星点状分布；再灌注(30～60)min，可观察到小动脉和细动脉内皮形成的空泡和血栓形成。

Other in vitro studies used normal breast epithelial cells, the kind that form the hollow oriented structures called acini, the milk-secreting glands of the breast.

另外的体外实验使用正常的乳腺上皮细胞，能够定向形成叫做腺泡的空泡结构，能够泌乳的乳腺细胞。

HCV particles are formed by "bud mutation" of HCV in the cytoplasmic vesicles of B-lymphocytes.

病毒在感染细胞胞质空泡部位合成和组装，以芽生方式进入胞质空泡内形成病毒颗粒。

Themotion equations of a bubble near a plane wall have been established with the lift forceand wall effects on the drag force taken into consideration.

我们在全面考虑壁面对空泡运动粘性阻力和升力影响的基础上，建立了空泡在近壁区内的运动方程，计算结果表明由于壁面的存在将阻滞空泡沿水流方向和垂直水流方向上的运动，即有滞留空泡在空化形成点，减缓空泡逸离空泡发生区的作用。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。