螺旋键

Effects of helix structure disorder about the hydrogen bond length and helix angle on charge transport of Poly-Polyhave been studied. The results indicate that the hydrogen bond length disorder has a significant effect on charge transport,while the case is contrary in the situation of helix angle disorder.

在双螺旋结构无序中研究了氢键键长无序和螺旋角无序对Poly-Poly电荷输运的影响，结果表明：氢键键长无序对其电荷输运有重要的影响，而螺旋角无序对其电荷输运影响不大。

Key or 6 key square serration axle is the traditional structure of starter armature shaft for auto and tractor and has been replaced by cold rolling multi key involuting serration axle.

铣削加工的四键或六键矩形花键是汽车、拖拉机用起动机电枢轴上的传统结构，已逐渐被用冷滚轧加工的多键渐开线螺旋花键所代替。

Depending on the amino acid sequence, the length of the ∝-helical portio are held together by hydrogen bonds formed between r grou , by salt linkages, by hydrophobic interactio , and by covalent disulfide（-s-s-0 linkages.

根据氨基酸顺序的不同，此α-螺旋段的长度也不同，并赋予独特的三级结构，这些折叠部分是靠R基团之间所形成的氢键，靠盐键、疏水相互作用以及共价二硫键而结合在一起的。

Adjacent helical chains are racemic. The Ag atom is linked to two nitrogen atoms of the 2-pyridyl and 4'-pyridyl groups from two different 2,4'-bpy ligands as well as to the oxygen atom of the counterion. In 17 and 19, the adjacent helical chains are linked to wavy two-dimensional network structures by the nitrate counterions.

相邻的螺旋链间是外消旋的，Ag 原子与分别来自两个不同2，4'-联吡啶的2-吡啶基和4'-吡啶基的氮原子以及阴离子的氧原子配位，在配合物17和19中，相邻聚合螺旋链被硝酸根离子桥连接起来，变成了一个波浪形的二维网络结构；配合物18是首次通过无桥连配体支持的Ag ××× Ag键将相邻螺旋链连接成二维非穿插的网络结构。

So far, nsLTP was proposed to promote the spreading of systemic acquired resistance signal in arabidopsis, and induce the adhesion of the pollen tube to an artificial stylar matrix in vitro, suggesting a receptor-like molecule likely exists in the cell membranes.

三级结构主要由四个α-螺旋组成，四个α-螺旋由四对二硫键相连，形成一个能结合各种脂质分子的疏水性孔穴。

This processing is located in Zhangzhou City in Fujian Province, China, close to Xiamen, production and sale of various types of gear, operating standards are gears, changing gear, helical gears, straight bevel gears, bronze worm gear, herringbone gear, sprocket, gear row, spiral clutch, milling plane, internal and external spline, keyway milling and hobbing machine and other processing, lathe processing and high-frequency heat treatment.

本加工场位于中国福建省漳州市境内，紧邻厦门，经营蜗轮加工与蜗轮减速机维修，生产和销售各式齿轮，经营标准正齿轮，变位齿轮，螺旋齿轮，直齿圆锥齿轮，铸铜蜗轮，人字齿轮，链轮，齿排，螺旋离合器，铣平面，内外花键，键槽等铣床和滚齿机加工，车床加工和高频热处理。

This processing is located in Zhangzhou City in Fujian Province, China, close to Xiamen, production and sale of various types of gear, operating standards are gears, changing gear, helical gears, straight bevel gears, bronze worm gear, herringbone gear, sprocket, gear row, spiral clutch, milling plane, internal and external spline, keyway milling and hobbing machine and other processing, lathe processing and high-frequency heat treatment.

本加工场位于中国福建省漳州市境内，紧邻厦门，生产和销售各式齿轮，经营标准正齿轮，变位齿轮，螺旋齿轮，直齿圆锥齿轮，铸铜蜗轮，人字齿轮，链轮，齿排，螺旋离合器，铣平面，内外花键，键槽等铣床和滚齿机加工，车床加工和高频热处理。

This processing is located in Zhangzhou City in Fujian Province, China, close to Xiamen, production and sale of various types of gear, operating standards are gears, changing gear, helical gears, straight bevel gears, bronze worm gear, herringbone gear, sprocket, gear row, spiral clutch, milling plane, internal and external spline, keyway milling and hobbing machine and other processing, lathe processing and high-frequency heat treatment.

本加工场位于中国福建省漳州市境内，紧邻厦门，经营齿轮蜗轮维修与蜗轮减速机维修，正齿轮个别断齿修复，生产和销售各式齿轮，经营标准正齿轮，变位齿轮，螺旋齿轮，直齿圆锥齿轮，铸铜蜗轮，人字齿轮，链轮，齿排，螺旋离合器，铣平面，内外花键，键槽等铣床和滚齿机加工，车床加工和高频热处理。

This processing is located in Zhangzhou City in Fujian Province, China, close to Xiamen, production and sale of various types of gear, operating standards are gears, changing gear, helical gears, straight bevel gears, bronze worm gear, herringbone gear, sprocket, gear row, spiral clutch, milling plane, internal and external spline, keyway milling and hobbing machine and other processing, lathe processing and high-frequency heat treatment.

本加工场位于中国福建省漳州市境内，紧邻厦门，本中心经营齿轮蜗轮维修与蜗轮减速机维修，正齿轮个别断齿修复，生产和销售各式齿轮，经营标准正齿轮，变位齿轮，螺旋齿轮，直齿圆锥齿轮，铸铜蜗轮，人字齿轮，链轮，齿排，螺旋离合器，铣平面，内外花键，键槽等铣床和滚齿机加工，车床加工和高频热处理。

I start modeling the snail shell, to do this I use a spiral spline and a circular shape inside a sweep NURBS, I activate it and adjust the spiral parameters to get both the necessary turns and the thickness at the beginning and at the end.

我开始建模蜗牛壳，为此我使用螺旋花键和一个圆形形状内打扫的NURBS ，我激活它，并调整螺旋参数，以获得这两个必要的转折和厚度在开始和结束时。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。