直径的

The formation mechanism of the hollow and helical fibers was proposed. During the heat treatment, the hollow fibers could be formed when the inner gel of the thinner precursor fibers was separated from the center and contracted to surface. However, the helical fibers could be generated when larger gel fibers were broken helically under thermal stress in the process of gel decomposing and contracting.

分析了中空纤维和螺旋纤维的形成机理，直径较小的前驱体纤维在热处理过程中内部凝胶向表层迁移收缩形成中空纤维；螺旋纤维是由直径较大的前驱体纤维在热处理过程中产生的强大的热应力导致纤维产生螺旋破裂形成的。

The results indicate that LG in hexahydric alloys can be studied by proper transformi. Using ΔGR can be calculated. R decrease with increase of T、γ and D. The calculated results show e the method is feasible. By line fitting the relationship between R and D(superscript -0.73653 subscript max) is linear and regression equation is prominent

结果发现，通过适当的处理，可以计算六元合金系的ΔG；用ΔG值计算出六元合金系的R，R分别随约化玻璃转变温度T(下标 rg、γ和最大直径D(下标 max的增大而减小，说明此计算方法是正确的；通过线性拟合，R与最大直径D(下标 max的-0.73653次方是相关的，相关性显著。

But the strata with high ground water level are composed of alluvium clays、 silty clay、 gravels and crushed stone soils in Chengdu;And the shield will drive in the interzone with complicated geologic environment, especially in the strata contained more than 50 percent of gravels which diameter is greater than 5cm, also contained big grain size gravels(the maximum diameter is about 1m)、 cement gravels and silty sand with lentoid mass;And on the ground there have many serried buildings in the prosperous zone.

而成都地铁工程将主要穿越由冲积粘性土、粉土、砂砾和碎石类土组成的覆盖层，地下水位高，盾构将通过大量地质条件和环境条件均极为复杂的区间，特别是地层中还夹杂有大漂石、胶结砾石层、粉细砂透镜体，隧道围岩中直径大于5cm的砾石含量一般都在50%以上，最大的漂石直径达1m左右，且地面多为建筑物密集的繁华地区，施工难度大，国内尚无先例，在国外也无完全成熟的经验。

objective to study the ct diagnosis of ureteral calculus at the distal end of ureter.methods 82 cases of ureteral caculus were examined by ct scanning.all cases were proved by clinical therapeutic results.results ureteral calculuses were showed as high density image in ct scanning.the ct values of the ureteral calculuses less than 7.5mm in diameter were beyond 83hu.the detection rate by ct was 96.3%.in all the 82 cases,ureteral with calculuses were found dilated and 69 cases with nephrohydrosis.in 13 cases with no nephrohydrosis,caculuses less than 3.8 mm in diameter were found.conclusion ct is the most valuable way to diagnose ureteral calculus at the lower end of ureter.appropriate methods of ct scanning are essential.

目的 回顾性分析输尿管膀胱入口处结石的ct诊断结果，评价其ct检查的临床应用价值。方法分析82例输尿管膀胱入口处结石的ct检查结果，所有病例均经尿道排石证实。结果输尿管膀胱入口处结石具有特征性的ct表现，即圆形或枣核状钙化高密度影，结石直径＜7.5mm，ct值≥83hu，ct确诊率96.3%。82例均发现病侧输尿管增粗，69例发现病侧肾盂少量积水，肾盂未见积水的输尿管膀胱入口处结石13例，其结石直径＜3.8mm。结论 ct检查输尿管膀胱入口处结石具有准确、无创、直观等优点，是诊断输尿管膀胱入口处结石不可替代的检查方法。

4Mm harvested in preculture, is the best. In this form, Rhizopus oryzae R1021 produced most L-lactic acid (76. 62g/L), the pellet size in production medium in flask and fermentor are 1. 9mm and 2. 6mm, respectively, and its L-lactic acid productivity reached or exceeded that of the immobilized cell with polyurethane foam. The produced L-lactic acid and the yield of L-lactic acid based on the total glucose and the productivity are above 74g/L and 74% and 2. 69g/L h, respectively, in 7 batches repetitive fermentation in fermentor, and the size of pellets remain 2. 6mm～3. 4mm.

摇瓶种子培养获得的菌球直径为1.4mm时，这种大小的菌球产酸最高，为76.62g/L；研究表明以直径1.4mm的菌球为种子，在摇瓶发酵和发酵罐发酵中菌球大小分别为1.9mm和2.6mm；这种菌球的产酸水平最高，可以达到甚至超过聚氨酯泡沫载体固定化细胞发酵乳酸的水平；在反复7批次发酵罐发酵过程中，菌球的大小始终保持在2.6mm～3.4mm之间，L-乳酸产量、得率和生产能力分别保持在74g/L、74％和2.69g/L h以上。

The results show that uniform CdS spheres with 500 nm can be synthesized with controlled concentration of PVP; the greater the concentration of PVP, the greater the diameter of particles, and the more homogeneous the particles; microspheres are composed of small substructural CdS crystallites, and the greater the polymer concentration, the smaller the diameter of substructural crystallites.

结果表明，控制高聚物的浓度可以制备得到直径在500nm的单分散硫化镉微球；高聚物浓度在一定范围内，微球的直径随浓度增大而增大，且分散性越好；微球是由硫化镉的微小单晶沉积而成的，随着高聚物的浓度增大，单晶的尺寸越小。

However, fully consideration of special structure and physiological function of CRP is critical to investigate whether CRP provide protect effect or pathogenic effect in the progression of atherosclerosis. CRP is a member of pentrxins family, which consists of five identical, noncovalently associated 23-kDa protomers arranged symmetrically around a central pore with a 102 A external diameter. Each protomer has a recognition face with a phosphocholine binding site consisting of two coordinated calcium ions adjacent to a hydrophobic pocket. The opposite face of the pentamer is the effector face, where complement Clq binds and Fc receptors are presumed to bind. A cleft extends from the center of the protomer to the central pore of the pentamer. Both faces ofpentamer form a special bi-phase structure: one face is the ligand recognition phase, which can recognize apoptosis cells and enzyme modified low density lipoprotein in which PCh is exposed.

CRP是一种五聚体蛋白，外径为102 A，由5个相同的单体以非共价键结合，形成双面的环形结构，每个单体的配体识别位点或受体结合位点分别位于五聚体两个平面上，分别组成配体识别相和效应器相，从而构成特殊的二相性结构：一面为配体识别相，含有磷酸胆碱(phosphorycholine，PCh)结合位点，能够使CRP识别在病理条件下暴露出PCh的凋亡细胞、酶修饰低密度脂蛋白(enzyme modified low density lipoprotein，E-LDL)等。E-LDL是天然低密度脂蛋白(native Low density lipoprotein，N-LDL)在多种蛋白酶，如胰蛋白酶、神经氨酸酶、胆固醇酯酶等作用下的代谢产物，其主要特点是结构发生改变(N-LDL大小均匀，平均直径250±30 A，E-LDL大小差异极大，直径为100-2000 A)，暴露磷酸胆碱位点，能够被CRP识别；另一面为效应器相，能够与巨噬细胞、单核细胞表面受体FcγRⅡa结合，介导巨噬细胞、单核细胞识别及吞噬凋亡、坏死细胞作用。

The crystal form and the shape of microspheres were charactered by XRD and SEM techniques, respectively.

结果表明：压强为700kPa下，水的用量比在84、112个摩尔配比时，得到的SAPO-5分子筛微球具有光滑的表面形貌和较好规整度，其中微球直径在10～15μm范围内，组成微球的SAPO-5分子筛的单晶的直径为2～3μm。

A The slimmest single filament is most similar to F-actin in size with ～7 nm width at half height and ～35 nmpitch ; the filaments have much wider diameter than the slimmest F-actin ; The branch filament could be con-stituted of two enlaced slimmer filaments , forming the branch in the joining point of another filament ; Two fila-ments are aligned side by side , and thought that there might exist certain interaction between them , which could be theearly step for further assembly of giant filaments.

肌动蛋白可通过自组织过程聚合形成不同直径(7nm～35nm)的长纤维，实验中观察到的最细纤维的结构参数与单根无鬼笔环肽结合时的F-actin[19 ]一致(Fig。 2 a)；此外，还有大量具有较大直径和分支结构的纤维出现，表明有不同于单根微丝和微丝束的高级纤维结构产生Fig。

It is proved that DLCPG not only has good extensibility, short diameter and simple topology, but also has the following good characteristics for the networks with 10k nodes: The diameter of DLCPG is shorter than that of 2-dimensional Torus and RP networks, and the grouping ability of DLCPG overmatches that of 2-dimensional Torus and RP networks at the same time.

证明了DLCPG不但具有良好的可扩展性、短的网络直径和简单的拓扑结构等特性，而且对于10k个节点组成的互联网络，DLCPG还具有比二维Torus以及RP互联网络更小的直径和更优越的可分组性。

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。