molecular weight

简明释义

分子量

英英释义

例句

1.In biochemistry, the molecular weight of proteins can vary significantly.

在生物化学中，蛋白质的分子量可能会有显著差异。

2.The molecular weight of glucose is 180.18 g/mol.

葡萄糖的分子量为180.18克/摩尔。

3.Chemists often use the molecular weight to determine the concentration of solutions.

化学家通常使用分子量来确定溶液的浓度。

4.The molecular weight of water is approximately 18 grams per mole.

水的分子量约为每摩尔18克。

5.To calculate the molecular weight of a compound, you need to sum the atomic weights of all its atoms.

要计算一个化合物的分子量，你需要将其所有原子的原子量相加。

作文

Understanding the concept of molecular weight is essential in the field of chemistry and biochemistry. The molecular weight of a compound refers to the mass of a molecule of that substance, measured in atomic mass units (amu). This value provides crucial information about the composition and behavior of molecules in various chemical reactions. For instance, when chemists are working on synthesizing new compounds or studying biochemical pathways, knowing the molecular weight allows them to calculate the amounts of reactants needed for a reaction. It also helps in determining the concentrations of solutions, which is vital for experimental accuracy.In practical applications, the molecular weight is used to identify substances and their properties. For example, in pharmacology, the molecular weight of a drug can influence its absorption, distribution, metabolism, and excretion in the body. A drug with a higher molecular weight may have a slower rate of absorption, while smaller molecules might be absorbed more quickly. Thus, understanding the molecular weight can significantly impact drug design and therapeutic efficacy.Moreover, the concept of molecular weight extends beyond just chemistry; it plays a crucial role in fields like environmental science and materials engineering. In environmental studies, the molecular weight of pollutants can determine their behavior in the atmosphere and their interactions with biological systems. Similarly, in materials science, the molecular weight of polymers affects their mechanical properties, thermal stability, and processing characteristics.To calculate the molecular weight, one must consider the atomic weights of all the atoms present in a molecule. For example, water (H2O) has a molecular weight of approximately 18 grams per mole, calculated by adding the atomic weights of two hydrogen atoms (1 g/mol each) and one oxygen atom (16 g/mol). This simple calculation exemplifies how molecular weight is determined and highlights its importance in both theoretical and applied chemistry.In conclusion, the significance of molecular weight cannot be overstated. It serves as a fundamental parameter in understanding chemical substances and their interactions. Whether in the laboratory, the pharmaceutical industry, or environmental research, knowledge of molecular weight is indispensable for scientists and researchers. As we continue to explore the complexities of molecular interactions and develop new materials and drugs, the understanding of molecular weight will remain a key component of scientific inquiry and innovation.

理解分子量的概念在化学和生物化学领域至关重要。分子量指的是该物质一个分子的质量，以原子质量单位（amu）为单位测量。这个值提供了关于分子组成和在各种化学反应中行为的重要信息。例如，当化学家们在合成新化合物或研究生化途径时，了解分子量可以让他们计算反应所需的反应物的量。这也有助于确定溶液的浓度，这对实验的准确性至关重要。在实际应用中，分子量用于识别物质及其性质。例如，在药理学中，药物的分子量会影响其在体内的吸收、分布、代谢和排泄。具有较高分子量的药物可能具有较慢的吸收率，而较小的分子可能被更快地吸收。因此，理解分子量对于药物设计和治疗效果产生重大影响。此外，分子量的概念不仅限于化学，它在环境科学和材料工程等领域也发挥着重要作用。在环境研究中，污染物的分子量可以决定它们在大气中的行为及其与生物系统的相互作用。同样，在材料科学中，聚合物的分子量会影响其机械性能、热稳定性和加工特性。要计算分子量，必须考虑分子中所有原子的原子量。例如，水（H2O）的分子量约为18克每摩尔，这是通过将两个氢原子（每个1 g/mol）和一个氧原子（16 g/mol）的原子量相加来计算的。这一简单的计算例子说明了分子量是如何确定的，并突出了它在理论和应用化学中的重要性。总之，分子量的重要性不容低估。它作为理解化学物质及其相互作用的基本参数。无论是在实验室、制药行业还是环境研究中，了解分子量对科学家和研究人员来说都是不可或缺的。随着我们继续探索分子相互作用的复杂性并开发新材料和药物，理解分子量将始终是科学探究和创新的关键组成部分。