screw axis

简明释义

螺旋轴线

英英释义

例句

1.Using X-ray diffraction, we can visualize the screw axis 螺旋轴 in complex protein structures.

通过X射线衍射，我们可以在复杂的蛋白质结构中可视化screw axis 螺旋轴。

2.The orientation of the screw axis 螺旋轴 affects the packing efficiency of the crystals.

screw axis 螺旋轴 的取向影响晶体的堆积效率。

3.The crystal structure was analyzed along the screw axis 螺旋轴 to determine its symmetry.

通过沿着screw axis 螺旋轴 分析晶体结构，以确定其对称性。

4.In this molecule, the screw axis 螺旋轴 plays a crucial role in defining its chirality.

在这个分子中，screw axis 螺旋轴 在定义其手性方面起着至关重要的作用。

5.The screw axis 螺旋轴 is essential for understanding the helical arrangement of DNA.

理解DNA的螺旋排列时，screw axis 螺旋轴 是必不可少的。

作文

In the realm of crystallography, the concept of a screw axis plays a pivotal role in understanding the symmetry and structure of crystals. A screw axis is defined as an imaginary line around which a crystal can be rotated and translated simultaneously. This means that when a crystal is rotated by a certain angle about this axis, it also moves along the axis itself by a specific distance. This dual movement is what makes the screw axis unique compared to other symmetry elements like rotation axes or mirror planes.To better illustrate this concept, consider a simple example of a spiral staircase. As you ascend the staircase, you not only move upward but also rotate around the central pole of the staircase. This simultaneous translation and rotation resemble the action of a screw axis, where the staircase represents the crystal structure and the pole symbolizes the screw axis.The significance of the screw axis in crystallography cannot be overstated. It helps in classifying crystals into various symmetry groups, which are essential for determining their physical properties. For instance, crystals with a screw axis often exhibit unique optical properties, making them valuable in the field of materials science and engineering. The presence of a screw axis can influence how light interacts with the crystal, leading to applications in optics and photonics.Moreover, the screw axis is crucial in the study of molecular structures. Many biological macromolecules, such as proteins and DNA, exhibit helical structures that can be described using the concept of a screw axis. Understanding these structures at a molecular level allows scientists to decipher the mechanisms of biological functions and interactions. For example, the double helix structure of DNA is inherently linked to the idea of a screw axis, as it involves a twisting motion along its length, combined with a rise per turn.In addition to its theoretical importance, the practical applications of the screw axis extend into various fields. In the manufacturing industry, the principles of a screw axis are employed in the design of screws, bolts, and other fasteners. These components rely on the helical geometry defined by the screw axis to create strong and reliable connections between different parts of machinery. Understanding the mechanics behind the screw axis can lead to innovations in product design and engineering efficiency.Furthermore, the screw axis has implications in the development of new materials. Researchers are exploring the use of screw axes in designing advanced nanomaterials with tailored properties. By manipulating the arrangement of atoms and molecules around a screw axis, scientists can create materials with enhanced strength, flexibility, or conductivity.In conclusion, the concept of a screw axis is fundamental to both theoretical and applied sciences. Its ability to describe the symmetry and structure of crystals, as well as its relevance in molecular biology and engineering, highlights its importance across various disciplines. As we continue to explore the intricate world of materials and biological systems, the screw axis will undoubtedly remain a key element in our quest for understanding and innovation.

在晶体学领域，screw axis的概念在理解晶体的对称性和结构方面发挥着关键作用。screw axis被定义为一个想象中的线，围绕这个线，晶体可以同时旋转和移动。这意味着当一个晶体绕这个轴旋转一定的角度时，它也沿着轴本身移动特定的距离。这种双重运动使得screw axis与其他对称元素，如旋转轴或镜面，形成了独特的对比。为了更好地说明这一概念，考虑一个简单的螺旋楼梯的例子。当你沿着楼梯上升时，你不仅向上移动，还围绕楼梯的中央柱旋转。这种同时的平移和旋转类似于screw axis的动作，其中楼梯代表晶体结构，而柱子象征着screw axis。在晶体学中，screw axis的重要性不容小觑。它有助于将晶体分类为各种对称组，这对于确定它们的物理特性至关重要。例如，具有screw axis的晶体往往表现出独特的光学特性，使它们在材料科学和工程领域中具有价值。screw axis的存在可以影响光与晶体之间的相互作用，从而导致在光学和光子学中的应用。此外，screw axis在分子结构研究中也至关重要。许多生物大分子，如蛋白质和DNA，表现出可以用screw axis的概念来描述的螺旋结构。在分子水平上理解这些结构使科学家能够解读生物功能和相互作用的机制。例如，DNA的双螺旋结构与screw axis的概念密切相关，因为它涉及沿其长度的扭转运动，结合每圈的上升。除了理论上的重要性，screw axis的实际应用也扩展到各个领域。在制造业中，screw axis的原理被用于设计螺丝、螺栓和其他紧固件。这些组件依赖于screw axis定义的螺旋几何形状，以在机器的不同部分之间创建强大而可靠的连接。理解screw axis背后的力学可以带来产品设计和工程效率的创新。此外，screw axis在新材料开发中也具有重要意义。研究人员正在探索在设计具有定制属性的先进纳米材料时使用screw axis的可能性。通过操纵原子和分子在screw axis周围的排列，科学家可以创造出具有增强强度、柔韧性或导电性的材料。总之，screw axis的概念对理论和应用科学都是基础性的。它描述晶体的对称性和结构的能力，以及在分子生物学和工程中的相关性，突显了它在各个学科中的重要性。随着我们继续探索材料和生物系统的复杂世界，screw axis无疑将继续成为我们理解和创新追求中的关键元素。