epimer

简明释义

英[ɪˈpɪmə(r)]美[ˈepɪmər]

n. 差向异构体；差位异构体

英英释义

单词用法

同义词

反义词

例句

1.In this article, some methods to prepare this kind of compounds are described, especially the methods to selectively prepare the C22R epimer.

本文介绍了合成这类化合物的一些方法，尤其是选择性制备c 22r异构体的方法。

2.In this article, some methods to prepare this kind of compounds are described, especially the methods to selectively prepare the C22R epimer.

本文介绍了合成这类化合物的一些方法，尤其是选择性制备c 22r异构体的方法。

3.Glucose and galactose are examples of an epimer (对映异构体) because they differ in the configuration around one specific carbon atom.

葡萄糖和半乳糖是一个epimer（对映异构体）的例子，因为它们在一个特定碳原子的构型上有所不同。

4.In carbohydrate chemistry, identifying an epimer (对映异构体) can help determine the properties of sugars.

在碳水化合物化学中，识别一个epimer（对映异构体）可以帮助确定糖的性质。

5.The enzyme epimerase is responsible for converting one sugar into its epimer (对映异构体).

酶异构酶负责将一种糖转化为其epimer（对映异构体）。

6.When studying metabolic pathways, understanding the role of epimers (对映异构体) is crucial.

在研究代谢途径时，理解epimers（对映异构体）的作用至关重要。

7.D-glucose and D-mannose are epimers (对映异构体) at the C2 position.

D-葡萄糖和D-甘露糖在C2位置是epimers（对映异构体）。

作文

In the world of chemistry, particularly in the study of carbohydrates, the term epimer plays a crucial role in understanding molecular structures and their functions. An epimer is defined as one of two stereoisomers that differ in configuration at only one specific carbon atom. This subtle difference can lead to significant variations in the properties and biological activities of the molecules involved. For instance, glucose and galactose are both sugars that serve as vital energy sources for living organisms, yet they are epimers of each other, differing only at the fourth carbon atom in their structure. The concept of epimers is not just a theoretical abstraction; it has practical implications in various fields such as biochemistry, pharmacology, and food science. In biochemistry, the transformation of one sugar into another through epimerization can affect metabolic pathways. Enzymes that catalyze these reactions are essential for maintaining the balance of sugars in the body, influencing everything from energy production to cellular signaling. In pharmacology, understanding epimers can be vital when developing drugs. The efficacy and safety of a drug can vary dramatically depending on its stereochemical configuration. For example, one epimer of a compound might exhibit therapeutic effects, while its counterpart could be ineffective or even harmful. This highlights the importance of stereochemistry in drug design and development. Moreover, in the food industry, the presence of epimers can influence the sweetness and flavor profile of products. For instance, the sweetness of sugars can vary based on their structural configurations, leading to different sensory experiences when consumed. Understanding how epimers interact with taste receptors can help food scientists create better-tasting products. To illustrate the significance of epimers, consider the example of D-glucose and D-mannose. These two sugars are epimers at the second carbon atom. While both are hexoses and share many similar properties, they interact differently with enzymes and receptors in the body. This difference can lead to varying rates of absorption and metabolism, demonstrating how even minor structural changes can have profound effects. In summary, the study of epimers is essential for understanding the complexity of carbohydrate chemistry and its implications in various scientific fields. From biochemistry to pharmacology and food science, the differences between epimers can dictate how substances behave in biological systems and impact human health. As we continue to explore the world of molecular interactions, the concept of epimers will undoubtedly remain a key focus for researchers and practitioners alike. By appreciating the nuances of these stereoisomers, we can better harness their potential for innovation and discovery in science and medicine.

在化学的世界中，尤其是在碳水化合物的研究中，术语epimer在理解分子结构及其功能方面发挥着至关重要的作用。epimer被定义为两个立体异构体之一，它们在仅一个特定碳原子的构型上有所不同。这种微妙的差异可能导致相关分子在性质和生物活性上有显著变化。例如，葡萄糖和半乳糖都是作为生物体重要能量来源的糖，但它们是彼此的epimer，仅在其结构的第四个碳原子上有所不同。 epimer的概念不仅仅是一个理论抽象；它在生物化学、药理学和食品科学等多个领域具有实际意义。在生物化学中，通过表观异构化将一种糖转化为另一种糖可以影响代谢途径。催化这些反应的酶对于维持体内糖的平衡至关重要，影响从能量生产到细胞信号传递的方方面面。 在药理学中，了解epimer在开发药物时可能是至关重要的。药物的疗效和安全性可能因其立体化学构型而大相径庭。例如，一种化合物的一个epimer可能表现出治疗效果，而其对应物则可能无效或甚至有害。这突显了立体化学在药物设计和开发中的重要性。 此外，在食品工业中，epimer的存在可能会影响产品的甜味和风味特征。例如，糖的甜度可能会根据其结构构型的不同而有所变化，导致消费时的感官体验不同。了解epimer如何与味觉受体相互作用，可以帮助食品科学家创造更美味的产品。 为了说明epimer的重要性，可以考虑D-葡萄糖和D-甘露糖的例子。这两种糖在第二个碳原子上是epimer。虽然它们都是六碳糖并共享许多相似的性质，但它们在体内与酶和受体的相互作用方式却不同。这种差异可能导致吸收和代谢速率的变化，展示了即使是微小的结构变化也能产生深远的影响。 总之，研究epimers对于理解碳水化合物化学的复杂性及其在各科学领域的意义至关重要。从生物化学到药理学和食品科学，epimers之间的差异可以决定物质在生物系统中的行为，并影响人类健康。随着我们继续探索分子相互作用的世界，epimers的概念无疑将继续成为研究人员和实践者的重点。通过欣赏这些立体异构体的细微差别，我们可以更好地利用它们在科学和医学中的潜力，以实现创新和发现。