polar molecule

简明释义

极性分子

英英释义

例句

1.Water is a classic example of a polar molecule due to its bent shape and the difference in electronegativity between oxygen and hydrogen.

水是一个经典的极性分子示例，因为它的弯曲形状以及氧和氢之间的电负性差异。

2.In biological systems, polar molecules like glucose are essential for energy transfer.

在生物系统中，像葡萄糖这样的极性分子对能量转移至关重要。

3.The polar molecule nature of ethanol allows it to mix with both water and oil.

乙醇的极性分子特性使其能够与水和油混合。

4.The polar molecule structure of ammonia allows it to dissolve in water easily.

氨的极性分子结构使其能够轻易溶解于水中。

5.Soap molecules have a polar molecule end that interacts with water and a non-polar end that interacts with grease.

肥皂分子有一个与水相互作用的极性分子端和一个与油脂相互作用的非极性端。

作文

In the realm of chemistry, understanding the properties and behaviors of different molecules is crucial. One important category of molecules is known as a polar molecule. A polar molecule is defined by its uneven distribution of electron density, which results in a molecule having a partial positive charge on one end and a partial negative charge on the other. This characteristic leads to a variety of unique properties that are essential for many biological and chemical processes.Water (H2O) is perhaps the most well-known example of a polar molecule. Its structure consists of one oxygen atom bonded to two hydrogen atoms. The oxygen atom is more electronegative than hydrogen, meaning it attracts electrons more strongly. As a result, the electrons spend more time closer to the oxygen atom, creating a partial negative charge on that side of the molecule, while the hydrogen atoms exhibit a partial positive charge. This polarity allows water to form hydrogen bonds with other water molecules and various solutes, making it an excellent solvent for many substances.The concept of a polar molecule extends beyond just water. Many biological molecules, such as proteins and nucleic acids, also exhibit polarity. For instance, amino acids, the building blocks of proteins, can have polar side chains that interact with water and other polar molecules, influencing the structure and function of proteins. This interaction is vital for processes such as enzyme activity and cell signaling.Polarity is not only significant in biological systems but also plays a crucial role in environmental science. For example, the polar molecule nature of water contributes to its ability to moderate temperature changes in the environment, making it a stable habitat for countless organisms. Additionally, the polarity of certain pollutants can affect their solubility in water, influencing how they disperse in ecosystems and their overall impact on the environment.Moreover, the study of polar molecules has practical applications in various fields, including pharmacology and materials science. In drug design, understanding the polarity of a compound helps scientists predict its solubility and bioavailability. Similarly, in materials science, the development of new polymers often involves manipulating the polarity of molecules to achieve desired properties, such as conductivity or strength.In conclusion, the significance of polar molecules cannot be overstated. Their unique properties arising from polarity are fundamental to many aspects of chemistry and biology. From the life-sustaining properties of water to the intricate interactions within biological systems, understanding polar molecules is essential for advancing scientific knowledge and addressing real-world challenges. As we continue to explore the molecular world, the role of polar molecules will undoubtedly remain a key focus of research and discovery.

在化学领域，理解和掌握不同分子的性质和行为至关重要。其中一个重要的分子类别被称为极性分子。极性分子的定义是其电子密度分布不均匀，导致分子的一端带有部分正电荷，而另一端带有部分负电荷。这一特性导致了许多独特的性质，这些性质对于许多生物和化学过程至关重要。水（H2O）可能是最著名的极性分子的例子。它的结构由一个氧原子与两个氢原子结合而成。氧原子比氢原子具有更高的电负性，这意味着它对电子的吸引力更强。因此，电子更倾向于在氧原子附近停留，从而使得分子的这一侧带有部分负电荷，而氢原子则表现出部分正电荷。这种极性使得水能够与其他水分子以及各种溶质形成氢键，使其成为许多物质的优良溶剂。极性分子的概念不仅限于水。许多生物分子，如蛋白质和核酸，也表现出极性。例如，氨基酸作为蛋白质的构建块，可以具有与水和其他极性分子相互作用的极性侧链，这影响着蛋白质的结构和功能。这种相互作用对于酶活性和细胞信号传导等过程至关重要。极性不仅在生物系统中具有重要意义，而且在环境科学中也发挥着关键作用。例如，水的极性分子特性使其能够调节环境中的温度变化，为无数生物提供稳定的栖息地。此外，某些污染物的极性会影响其在水中的溶解度，从而影响它们在生态系统中的分散方式及其对环境的整体影响。此外，研究极性分子在药理学和材料科学等多个领域具有实际应用。在药物设计中，了解化合物的极性有助于科学家预测其溶解度和生物利用度。同样，在材料科学中，新型聚合物的开发通常涉及操控分子的极性以实现所需的性能，如导电性或强度。总之，极性分子的重要性不可低估。由于极性引起的独特性质是化学和生物学众多方面的基础。从水的维生素特性到生物系统内复杂的相互作用，理解极性分子对于推动科学知识的发展和解决现实世界问题至关重要。随着我们继续探索分子世界，极性分子的角色无疑将继续成为研究和发现的重点。