查询词典 helix

Replicas of DNA are made when the double helix unwinds as a result of helicase enzyme action and the separated strands serve as templates along which complementary nucleotides are assembled through the action of the enzyme DNA polymerase. The result of the two new molecules of DNA each containing one strand of the original molecule, and the process is termed semiconservative replication.

DNA 的复制在解旋酶解开 DNA 链时开始，解开的链作为模板 DNA 聚合酶的作用下结合相对应的核苷酸，最终形成了两条新的 DNA 的链，每一条的链含有一条链原来的 DNA 单链，因此又叫做半保留复制。

Semiconservative replication :The two strands of DNA double helix are separated, each strand serves as a template for the synthesis of a new complementary strand, producing two daughter molecules. Each daughter molecule has one parental strand and one newly synthesized strand.

半保留复制： DNA 生物合成时，母链 DNA 解开为两股单链，每股单链分别作为模板，以 dNTP(dATP 、 dGTP 、 dCTP 、 dTTP)为原料，按照碱基配对(A － T 、 G － C)规律与模板上的碱基配对，经依赖 DNA 的 DNA 聚合酶催化，合成一条与模板互补的新链，新形成的两个子代 DNA 与亲代 DNA 碱基序列一致，子代 DNA 分子中一股单链是从亲代完整地接受过来，另一股单链是新合成的，故称为半保留复制。

Silicium in our body,triple-helix, size: 1,08 meters ,population 12 billion,other

我们的身体由硅原子组成（注：我们地球人是碳原子组成），DNA为三螺旋结构，身高1.08米，人口12亿

We also got STM images of denatured fibroin under stress or by methanolin molecular level. We found the conformation of silk fibroin is changed from α-helixand random coil structures to β-strand and loosed α-helix formation. We employed the STM to explore the structure and morphology of silk fibroinin the middle silk gland of mature silkworm.

我们在分子水平上对在冰冻和甲醇处理下的丝心蛋白的变性情况进行了STM研究，我们发现丝心蛋白的构象由α-螺旋结构和无规线团的结构向β-伸展链和松散折叠α-螺旋结构转变我们还用STM对熟蚕的中部丝腺体中的丝心蛋白的结构形态进行了研究。

First of all, the improving feeding helix can not only get material into the ball mill successfully, but also increase ventilated proportion; Secondly ,making use of all sorts of new scaleboards can reform the working condition of skive substance and raise the material adaptability; Third, separating storehouse board, have not only increased control material to flow, and balanced each storehouse smash the function of ability, but also realize thickness pellet grade role; Grind tail storehouse choose hyperboloid drum liner, in axial and circumference direction have incline curved surface, can not only increase steel ball lateral grade , but also still raise steel forge , steel ball grind efficiency.

进料口螺旋的改进，不仅解决了堵料现象，而且加大了通风面积；各种新型衬板的使用，对研磨体运动状态的调节以及对物料的适应性都有了较大的改善；隔仓板不仅增加了控制料流及平衡各仓粉碎能力的功能，而且可以实现粗细颗粒的分级作用；磨机尾仓选用双曲面衬板，在轴向和圆周方向均有倾斜曲面，不仅能够增加钢球的横向分级，还能提高钢锻、钢球的研磨效率。

Firstly, the parallel mechanism parameters are designed by theory, and the two spherical hinges of cue instrument on the mobile and base platform are fixed up separately. Under the condition that the mobile platform parallels the base platform, the center of spherical hinge of the cue instrument on the mobile platform are moving along a spherical helix corresponding to the center of spherical hinge on the base platform.

首先按理论并联机构设计参数，将一球杆仪的两个球铰分别固定在保持平行的动、静平台上，令球杆仪在动平台上的球铰中心相对于静平台上的球铰中心做球面螺旋线运动。

Fluid flow rate in Shan bolt pump is low, its rotator is to roll within the stater, But, that the determinant hardness may come according to the character transferring medium selected, is beneficial to a factor since the Shan bolt pump has these, makes it also apply to the liquid transporting the suspension containing hard quality solid particle, usage than and the soft solid suspension liquid (the glue waits fruit thick, soft) here Shan bolt pump transporting viscosity20,000 mpas liquid, Give modification if its standard is designed, increase set up one helix give material an implement, it can transport 200,000 mpas liquid then in the leading-in rotator and stater cavity more easy to use viscidity liquid, therefore it is one kind of the pump being much used for transportinghigh viscosity.

单螺杆泵中的流体流速低，它的转子是在定子内滚动，而定子的硬度又可根据输送介质的性质来选定，由于单螺杆泵具有这些有利因素，使它也适用于输送含有硬质固体颗粒的悬浮液，及软性固体悬浮液此单螺杆泵可使用于输送粘度2万mpas的液体，所以它是一种常用来输送高粘度的泵。

This paper focuses on the optimal pitch arrangement in double-side heating once-through steam generator with helix tube inside.

本文主要研究了带内螺旋缠绕管的管套管双面加热直流蒸汽发生器元件中沸腾段内螺旋管螺距设置的优化问题。

The thickness of eyelid, vermilion of the lip, nasal ala, helix of ear, submaxilla, temporalis anterior are less than 2mm, the thickness of apex of nose, upper lip, nasal dorsum, eyebrow are more than 3 mm, and other sites range from 2 to 3mm.conclusion the thickness of skin and epidermis is different in different sites in faces, the proportion of epidermis and skin is relatively stable and there is some character in the thickness distribution area.

除口唇、鼻、眼眉、耳轮、下颌等部位外，面部大部分皮肤厚度为2.00～3.00mm。结论：本组所测青壮年面部不同部位的皮肤和表皮厚度不同，表皮占皮肤的比例相对稳定，皮肤厚度的区域分布具有一定特点，据此可以指导面部的磨削术等外科手术。

Firstly, the developing principles of the cylindrical internal helical gear are proposed through analyzing the movement and geometry requirements, which provides continuous contact between the mating gear surfaces. The tooth surface of the internal helical gear in the new gearing can be imagined as being generated by the normal section of the conjugated surface of the ball-tooth, moving along the radial projection of helix line of the tooth-root circle. Also, the proposed surface can be approximate tangent to the conjugated surface of the ball-tooth along a spacial curve.

首先，通过分析保证行星轮作螺环运动时与内斜齿轮实现连续啮合传动的运动和几何条件，提出了圆柱内斜齿轮齿面的两种形成原理：即由球齿运动包络曲面的法截面沿其齿根圆螺旋线在径向的投影进行拓展所形成的内齿面，以及与球齿运动包络曲面呈近似相切接触的等螺距齿面构成的内齿面。

This immediately brings us to the next part of this article: creating an output "replace function".

下面进入文章的第二部分：建立一个"缓存处理函数"。

He was elected as an International Ornithological Committee member in 2002 during the 24th IOC held in Beijing.

现为中国鸟类学会理事和WPA 专家组成员。2002年被推选为国际鸟类委员会委员。