泡

The optimal conditions through testing of defoaming performance and foam suppressing performance are:reaction temperature at 100 ℃;for 10 h;the mass ratio of polyether to hydrogenous silicone oil is 15∶1 and the dosage of catalyst is 0.2%.

聚醚改性聚硅氧烷消泡剂是将聚醚和有机硅消泡剂两者的优点有机结合起来的一种新型高效消泡剂，由于其消泡效力强，且其耐热性、抗剪切性及耐酸碱盐性能好，加之还具有无毒无味、贮藏稳定及使用方便等优点，因而被广泛用在各种场合，特别是用于许多苛刻条件下的消泡，比如纺织品高温染色工艺、发酵工艺中的消泡[1]，但是此类消泡剂在我国还处于研制阶段，很

Based on the theory of cavitating flows,the definition of supercavitation ,the main idea of reducing drag by ventilated cavitation and the principle of supercavitation torpedo are introduced.

文章从空泡流理论出发，介绍了超空泡的定义、超空泡减阻的基本思想和超空泡鱼雷的工作原理，并分析了超空泡技术研究中的关键问题和未来发展趋势

Histological structures of bursas of Fabricius were observed at the different developmental stages from chicken embryoes to chickens. The results were as follows. The bursa of Fabricius began to develop on the 13th day of post-hatching and its cell aggregated into the nodosity clique underneath the epithelium mucosae. On the 15th day of post-hatching, those cell cliques were surrounded by the flat epithelium and formed the basic structure of folliculus lymphaticus. The number of lymphocytes in the folliculus lymphaticus increased gradually, and the medulla and cortex of a majority of folliculus were not discriminated obviously. Until on the 7th day for chickens, the medulla and cortex of folliculus formed completely and the number of folliculus increased significantly. From 21 to 35 days old, the folliculus lymphaticus transformed from polygon into rectangle. Mucosa epithelial cells increased gradually and their cytoblasts arranged compactly into aline in the basilar part on the 35th day.

本研究观察了从鸡胚到出壳后的不同生长发育阶段法氏囊的组织结构，结果表明：胚胎13日龄时，法氏囊开始发育，粘膜上皮下形成结节状细胞集团；胚胎15日龄，聚集的细胞集团形成初始的淋巴滤泡；胚胎18日龄到出壳后1日龄，滤泡内淋巴细胞数量增多，多数滤泡髓质和皮质界限仍不明显；7日龄雏鸡法氏囊髓质皮质分界清晰，滤泡数量显著增多；21日龄到35日龄，滤泡由多边形逐渐转变成长方形；在35日龄时，粘膜上皮细胞逐渐增多，排列紧密，细胞核紧密排列成直线位于基底部。

The spermatozoa are embeded in a extracellalar matrix composed of high dense fibrils matrix and flocculent and concentric vesicles similar to that in the primary spermatophore layer, but the later lack of spermotozoa. The flocculent and concentric vesicles are often seen to release their contents around the main body of spermatozoa. The spermatozoa may absorb the contents to form vesicular zone and membrane zone in sperm nucleu. The secondary spermatophore layer is distinctly subdivided into inner region and outer region. The loose outer region consists of canaliculated reticulum and large flocculent vesicles.

输精管内的精荚为管状，由精子群、精荚基质及初级精荚壁和次级精荚壁组成，初级精荚壁与精荚基质是相连续的，它们之间无明显界限，两者均由电子密度较高的纤丝状基质和絮状泡和同心圆泡组成，但后者不含精子，后者中的絮状泡和同心圆泡常在精子主体部周围释放内含物，可能与形成精子细胞核中的泡状带和膜状带有关，在交配后的雌虾，其头胸部腹面上粘着的精荚中，其基质内已不见絮状和同心圆泡，仅见稀疏的纤丝。

In the sub-cluster scale theory, R1 indicated the possibility which the hole skip the middle size hole to become a big cell, it would make striking influence on the tensibility ; R2·R1 indicated the well-distribution degree of cell size, it would make the notable influence on the cell density P; R2/R1 indicated the big cell and small cell exchange possibility, it would make the remarkable influence on the re-spring degree because of the different influence with the hole size.

其中R1表征泡孔越过中等泡向大泡孔缔合的倾向，它对断裂伸长率影响最大；R1·R2表征泡孔的均匀性，受泡孔密度影响较大；lnR2／R1表征体系在发泡过程中大小泡孔相互转化倾向比，由于大小泡孔对泡体回弹率贡献不同，lnR2／R1对发泡体回弹率影响较大。

However, if the amplitude excessed 90%, the mounts of larger bubble increase as the increasing time.

另外，选择惰性气体SF6作为微泡内气体，设计了基于两种非离子表面活性剂（Span 60和Tween 80）的包膜超声造影微泡的膜材料组成，使用声振法制备得到表面活性剂包膜的超声造影微泡；对制备过程中的声振条件进行优化，结果表明总体上振幅越大，处理时间越长，声振后溶液的总体积增加得越多，即产生的微泡量越大，并且平均粒径越小，但当声振幅度增大到90%时，随着声振时间的延长，主要增加的是大微泡的量，有效微泡的量无明显增加，因此最佳的声振条件选择为振幅90%，声振时间60s。

The tissue slices were observed by microscope.2 The mechanism of microbubble cavitation induced intravascular gene transportSeveral frames of ultrasound were delivered to exteriorized spinotrapezius by a therapy ultrasound device directly.

超声能量越大、照射时间越长、微泡输入速度越快时，微泡空化在大鼠脊斜肌微血管造成的出血点越多，损伤越重；当超声脉冲间隔为5s时，微泡充满微循环，微泡空化造成的出血点最多；可以通过肺循环的微泡—全氟显，动或静脉输入对出血点产生数量影响不明显：结构相似的微泡，出血点产生数量相近。

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。

Assuming fluid is and viscid and slightly compressible, bubble collapse near rigid boundary and free surface is simulated, displaying characteristics such as formation, penetration and impact of reentrant jet as well as vortex ring and bubble rebound.

采用粘性、微可压流体模型，数值模拟了空泡在刚性边界和自由面附近溃灭及空泡溃灭后流动的发展，显示了空泡溃灭过程中的凹陷射流形成、空泡贯穿、射流冲击、涡环的形成和空泡回弹等流动特征，提出空泡回弹的另一种机制是凹陷射流冲击形成的旋涡。

The development of the Company in Shenzhen have been seven or eight years, the company funds the strength of Division I professional production: bubble bag, steam beads BAG and EPE manufacturers produce a wide range of steam beads packing material (single surface bubble sheet; double-sided bubble sheet; single bubble bag; double bubble bag; single / double-sided bubble BAG organ; Quartet BAG) and EPE packing material (pearl cotton sheet; EPE BAG; EPE laminating bag, EPE composite bubble) all kinds of plastic bags and so on.

本公司在深圳发展已有七、八年，公司资金实力雄厚，我司是专业生产：汽泡袋，汽珠袋）与珍珠棉的厂家，可生产各式各样的汽珠包装材料（单面汽泡片材；双面汽泡片材；单面汽泡袋；双面汽泡袋；单/双面风琴汽泡袋；四方袋）和珍珠棉包装材料（珍珠棉片材；珍珠棉袋；珍珠棉复膜袋，汽泡复合珍珠棉）各种胶袋等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。