螺旋

It was found that the silk fibroin obtaineddirectly from anterior and middle regions of middle division of silk gland is in orderedstate, assumed to be in nematic form, but not observed in posterior region, in whichliquid silk fibroin is in coiled coil and some α-helix forms. In the middle region of middle division there is a relatively regular arrangement for the α-helix, and there is arelatively regular arrangement for β-strand and loosed α-helix in anterior region.

在熟蚕丝腺体的中部前、中段的丝心蛋白处于类向列型液晶的有序态，而中部后段中则观察不到此有序态，而是呈无规线团和一些α-螺旋结构，而且中部前中段的结构也有区别，中部中段的有序态为α-螺旋结构的相对规则聚集，而中部前段的则为β-伸展链和松散α-螺旋结构的相对规则聚集。

The growth and nucleation rates of〓 cleavage face of YbYAB crystal are all very fast, because so many growth steps and growth centers were formed within only 2～3 second at the temperature near the saturate point. No spiral growth steps can be found, so growth mechanism is twodimensional nucleation. When the flux temperature increases for only 0.5℃ above the saturate point, the spiral melting holes are formed. The transformation from growth morphologies to melting morphologies is very sensitive to the temperature. When the temperature increases another 1℃, the spiral melting holes transform into two-dimensional nucleation melting holes.

YbYAB的〓解理面的生长及成核速度都非常快，在比饱和点低0.5～1℃的温度下，当生长2～3秒钟时，可以看到许多生长中心与生长台阶的形成，在较宽的台阶上还可以看到二维核的形成，没有看到螺旋中心，说明生长机理是二维成核生长；当温度比饱和点高0.5℃时，在〓解理面上形成螺旋状熔坑，这表明形貌由生长到熔化的转变与温度的关系是非常敏感的；当温度比饱和点高1.5℃时，螺旋状熔坑转变为二维成核状熔坑。

Although the spiral parts is widely used, there is very few studies on the spiral buries parts and in the vicinity of the stress and strain analysis, and when studies on the force, often approximates the spiral surface to the smooth surface in computing, or obtains through experiments.

虽然螺旋状预埋件的应用广泛，但是关于螺旋状预埋件及其周边的应力应变分析的定量分析在国内外的研究却很少，在研究时往往通过试验获得数据，然后进行定性分析，或者将其螺旋状的表面近似成光滑的表面进行计算。

Depending on the axis being spacelike, timelike or null, there are three types of screw motions, the third case, i.e., cubic screw motion, is most particular because it is not a rotation together with a translation along the null axis, but a rotation together with a translation along a null curve with non-zero curvature.

依据旋转轴的向量类型，三维Minkowski空间中的螺旋运动可分为三类，其中第三类螺旋运动，即三次螺旋运动，是最特殊的。

In chapter 2,we establish theformulation of the extended mean-field theory that can be applied to cholesteric liquidcrystals,and we apply this extended mean-field theory to study the helical structure ofcholesteric liquid crystals.

在第二章中，我们将文献[6]中丝状液晶中的广义平均场方法推广到了螺旋状液晶体系，并用这一方法讨论了螺旋状液晶中分子指向矢的螺旋结构。

A spiral formation, such as one of the whorls of a gastropod shell .

螺旋形一种螺旋形状，如一个涡螺壳上的螺旋

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。

According to the helix theory , in almost all structures of organic compounds exist helices.

螺旋理论认为，几乎所有的有机化合物结构中都存在螺旋，螺旋结构是导致旋光性的根本原因。

After the supplement of L-Leu, extracellular isovaleric acid was accumulated in vitro and then reabsorbed for eutilization, the ultimate relative content of isovalerylspiramycin II, isovalerylspiramycin III was increased by 41% and 50% respectively, and the relative content of total isovalerylspiramycins increased by 41.9% with the biological titer of biotechspiramycin being equal to that of the control group.

添加Leu对初级代谢影响不大，异戊酸在胞外积累，随后被重新吸收利用，最终异戊酰基螺旋霉素II和异戊酰基螺旋霉素III组分分别提高了41%和50%。同时总异戊酰基螺旋霉素相对含量也比对照提高了41.9%，效价和对照基本一致。

Of or belonging to the phylum Nemertina.

螺旋起重机，螺旋千斤顶由螺旋杆运作的起重机

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了