molecular weight

简明释义

分子量

英英释义

例句

1.When performing mass spectrometry, knowing the molecular weight is crucial for identifying substances.

在进行质谱分析时，了解分子量对于识别物质至关重要。

2.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。

3.The molecular weight of water is approximately 18 g/mol.

水的分子量约为18克/摩尔。

4.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差异很大。

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

葡萄糖的分子量是180.18克/摩尔。

作文

Understanding the concept of molecular weight is essential in various fields of science, particularly in chemistry and biology. The molecular weight of a substance refers to the mass of a molecule of that substance, typically measured in atomic mass units (amu). This measurement plays a crucial role in determining how substances interact with one another, as well as their behavior in different reactions. In this essay, we will explore the significance of molecular weight, its calculation, and its applications in real-world scenarios.Firstly, let’s delve into the calculation of molecular weight. To find the molecular weight of a compound, one must consider the atomic weights of all the atoms present in the molecule. For example, water (H2O) consists of two hydrogen atoms and one oxygen atom. The atomic weight of hydrogen is approximately 1 amu, while that of oxygen is about 16 amu. Therefore, the molecular weight of water can be calculated as follows: (2 x 1) + (1 x 16) = 18 amu. This simple calculation illustrates how molecular weight can be derived from the composition of a molecule.The significance of molecular weight extends beyond mere calculations; it has practical implications in various scientific disciplines. In chemistry, for instance, understanding the molecular weight of reactants is vital for stoichiometry, which involves calculating the proportions of elements and compounds involved in chemical reactions. A chemist must know the molecular weight to accurately mix substances in the correct ratios to achieve desired reactions.Moreover, in the field of pharmacology, the molecular weight of drug molecules is crucial in determining their absorption and distribution within the body. Drugs with lower molecular weights tend to be absorbed more readily through biological membranes, which can influence their effectiveness and dosage requirements. Understanding the molecular weight helps researchers design better drugs that can target specific diseases more efficiently.In addition to chemistry and pharmacology, molecular weight also plays a significant role in biochemistry. Proteins, nucleic acids, and other biomolecules have specific molecular weights that affect their function and interactions. For example, enzymes are proteins that catalyze biochemical reactions, and their molecular weight can influence their activity levels and stability. By studying the molecular weight of these biomolecules, scientists can gain insights into their roles in biological processes and how they can be manipulated for therapeutic purposes.In conclusion, the concept of molecular weight is fundamental to many scientific fields, providing a basis for understanding the properties and behaviors of substances at the molecular level. Whether in the laboratory conducting experiments or in the pharmaceutical industry developing new medications, knowledge of molecular weight is indispensable. As science continues to advance, the importance of accurately measuring and understanding molecular weight will only grow, highlighting its relevance in both research and practical applications. Therefore, mastering the concept of molecular weight is not just beneficial but essential for anyone pursuing a career in the sciences.

理解分子量的概念在科学的各个领域，特别是化学和生物学中至关重要。分子量指的是某种物质的一个分子的质量，通常以原子质量单位（amu）来测量。这一测量在确定物质之间的相互作用以及它们在不同反应中的行为中发挥着至关重要的作用。在本文中，我们将探讨分子量的重要性、其计算方法以及在现实世界中的应用。首先，让我们深入了解分子量的计算。要找到化合物的分子量，必须考虑分子中所有原子的原子量。例如，水（H2O）由两个氢原子和一个氧原子组成。氢的原子量约为1 amu，而氧的原子量约为16 amu。因此，水的分子量可以这样计算：（2 x 1）+ （1 x 16）= 18 amu。这一简单的计算说明了如何根据分子的组成推导出分子量。分子量的重要性不仅限于计算，它在各个科学学科中都有实际的意义。例如，在化学中，了解反应物的分子量对于化学计量学至关重要，化学计量学涉及计算参与化学反应的元素和化合物的比例。化学家必须知道分子量才能准确地按正确的比例混合物质，以实现所需的反应。此外，在药理学领域，药物分子的分子量对于确定其在体内的吸收和分布至关重要。具有较低分子量的药物往往更容易通过生物膜被吸收，这可能会影响其有效性和剂量要求。理解分子量有助于研究人员设计更好的药物，更有效地靶向特定疾病。除了化学和药理学，分子量在生物化学中也发挥着重要作用。蛋白质、核酸和其他生物大分子具有特定的分子量，这影响它们的功能和相互作用。例如，酶是催化生化反应的蛋白质，其分子量可能会影响其活性水平和稳定性。通过研究这些生物大分子的分子量，科学家可以深入了解它们在生物过程中的角色以及如何进行治疗干预。总之，分子量的概念是许多科学领域的基础，为理解物质在分子层面的性质和行为提供了基础。无论是在实验室进行实验，还是在制药行业开发新药，掌握分子量的知识都是不可或缺的。随着科学的不断进步，准确测量和理解分子量的重要性只会增加，突显其在研究和实际应用中的相关性。因此，掌握分子量的概念对任何追求科学职业的人来说不仅是有益的，而且是必不可少的。