aldehydes

简明释义

英[ˈældɪˌhaɪdz]美[ˈældəˌhaɪdz]

n. 醛；[有化]醛类；乙醛（aldehyde 的复数）

英英释义

单词用法

同义词

反义词

例句

1.This mechanism is different from that for the acetalization reaction of polyvinyl alcohol with saturated aldehydes, which has only 1, 2 addition.

此机理不同于只有1,2加成方式的聚乙烯醇缩饱和醛化反应。

2.This method applies for measuring aldehydes in hydrophobic adhesives with relatively low aldehydes content.

本方法适用于分析醛类含量较低的疏水性胶粘剂中的醛类物质。

3.REDOX Relationships amongst Alcohols, Aldehydes and Ketones and Carboxylic acids.

醇，醛与酮和羧酸之间的氧化还原关系。

4.A method was developed for the analysis of volatile aldehydes in mainstream smoke of cigarettes by gas chromatography.

本文研究了采用毛细管气相色谱仪分析卷烟烟气中醛类化合物的方法。

5.Aldehydes possess anesthetic properties.

醛类具有麻醉的作用。

6.They do not burn readily and are reasonably resistant to chemicals, except for nitric and sulfuric acids, chlorinated hydrocarbons, and aldehydes.

它们不易燃烧，相当地耐化学品，除非是硝酸、硫酸、氯化烃和醛类。

7.The presence of aldehydes 醛类 can indicate spoilage in food products.

食品中存在醛类可能表明变质。

8.Many perfumes contain aldehydes 醛类 to enhance their fragrance.

许多香水中含有醛类以增强其香气。

9.In the synthesis of drugs, aldehydes 醛类 often serve as intermediates.

在药物合成中，醛类通常作为中间体。

10.In organic chemistry, the study of aldehydes 醛类 is essential for understanding various reactions.

在有机化学中，对醛类的研究对理解各种反应至关重要。

11.Formaldehyde is a common example of an aldehyde 醛类 used in industrial applications.

甲醛是工业应用中常见的醛类例子。

作文

Aldehydes are a fascinating class of organic compounds that play a significant role in both chemistry and everyday life. These compounds contain a carbonyl group, which is a carbon atom double-bonded to an oxygen atom, and they are characterized by the presence of a hydrogen atom attached to the carbonyl carbon. The general structure of an aldehyde can be represented as RCHO, where R represents any alkyl or aryl group. One of the most well-known examples of an aldehyde is formaldehyde, which is commonly used in various industrial applications and as a preservative in biological laboratories. In this essay, we will explore the properties, uses, and significance of aldehydes (醛) in our daily lives.Firstly, it is essential to understand the physical and chemical properties of aldehydes (醛). They are typically colorless liquids with distinct odors, and many aldehydes (醛) have sweet or fruity fragrances. This characteristic makes them valuable in the fragrance industry, where they are used to create perfumes and flavorings. Chemically, aldehydes (醛) are reactive compounds that can undergo various reactions, including oxidation and reduction. When oxidized, aldehydes (醛) can form carboxylic acids, while reduction can lead to the formation of alcohols. These reactions are crucial in organic synthesis and are widely utilized in the production of various chemicals.Secondly, aldehydes (醛) have numerous applications across different industries. In the field of medicine, for example, formaldehyde is used for tissue preservation and sterilization. It helps to prevent the decomposition of biological specimens, allowing researchers to study them in detail. Additionally, aldehydes (醛) are used in the production of resins and plastics, which are essential materials in construction, automotive, and consumer goods industries. The versatility of aldehydes (醛) makes them integral to the manufacturing processes of countless products that we use every day.Moreover, aldehydes (醛) also occur naturally in various foods and plants. For instance, vanillin, the primary component of vanilla extract, is an aromatic aldehyde (醛) that contributes to the flavor and scent of vanilla. Similarly, many fruits produce aldehydes (醛) during ripening, which enhances their aroma and taste. This natural occurrence of aldehydes (醛) showcases their importance not only in synthetic applications but also in nature's own processes.However, it is crucial to note that some aldehydes (醛) can be toxic or harmful. For example, prolonged exposure to formaldehyde has been linked to respiratory issues and other health concerns. Therefore, understanding the properties and potential hazards of aldehydes (醛) is vital for ensuring safety in both industrial and domestic environments.In conclusion, aldehydes (醛) are a significant class of organic compounds that have diverse applications and implications in our lives. From their role in the fragrance industry to their importance in medical applications and natural processes, aldehydes (醛) are truly remarkable. As we continue to explore the world of chemistry, it is essential to appreciate the contributions of aldehydes (醛) and their impact on various aspects of our daily existence.

醛是一类迷人的有机化合物，在化学和日常生活中发挥着重要作用。这些化合物含有一个羰基，羰基是一个与氧原子双键结合的碳原子，并且它们的特征是一个氢原子连接在羰基碳上。醛的一般结构可以表示为RCHO，其中R代表任何烷基或芳基。最著名的醛之一是甲醛，它常用于各种工业应用和生物实验室中的防腐剂。在这篇文章中，我们将探讨醛的性质、用途和在我们日常生活中的重要性。首先，了解醛的物理和化学性质至关重要。它们通常是无色液体，具有明显的气味，许多醛都有甜味或水果香味。这一特性使它们在香料行业中非常有价值，广泛用于制造香水和调味品。从化学上讲，醛是反应性化合物，可以经历多种反应，包括氧化和还原。当被氧化时，醛可以形成羧酸，而还原则可以导致醇的形成。这些反应在有机合成中至关重要，被广泛应用于各种化学品的生产。其次，醛在各个行业中有许多应用。例如，在医学领域，甲醛用于组织保存和消毒。它有助于防止生物标本的分解，使研究人员能够详细研究它们。此外，醛用于树脂和塑料的生产，这些材料在建筑、汽车和消费品行业中至关重要。醛的多功能性使它们成为我们每天使用的无数产品制造过程中的重要组成部分。此外，醛也自然存在于各种食品和植物中。例如，香草醛是香草提取物的主要成分，是一种芳香醛，赋予香草其风味和气味。类似地，许多水果在成熟过程中会产生醛，从而增强其香气和味道。这些醛的自然存在展示了它们在合成应用和自然过程中的重要性。然而，必须注意的是，一些醛可能是有毒或有害的。例如，长期接触甲醛与呼吸问题和其他健康问题有关。因此，了解醛的性质和潜在危害对于确保工业和家庭环境的安全至关重要。总之，醛是一类重要的有机化合物，在我们的生活中具有多种应用和意义。从它们在香料行业的作用到它们在医学应用和自然过程中的重要性，醛确实是非凡的。随着我们继续探索化学世界，欣赏醛的贡献及其对我们日常生活各个方面的影响是至关重要的。