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相关概念视频

Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis02:29

Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis

10.1K
Overview
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
10.1K
CNS Depressants: Alcohol and Nicotine01:27

CNS Depressants: Alcohol and Nicotine

171
Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...
171
Mass Spectrometry: Alcohol Fragmentation01:03

Mass Spectrometry: Alcohol Fragmentation

3.3K
Alcohols (R-OH) ionize to lose one non-bonded electron from the oxygen atom, forming molecular ions. Due to their tendency to fragment rapidly, the intensity of the molecular ion peak in the mass spectrum is weak or sometimes absent. The fragmentation patterns for alcohols occur in two ways, i.e. ⍺-cleavage and dehydration. During ⍺-cleavage, the bond at the ⍺-position adjacent to the hydroxyl group cleaves to give a resonance-stabilized cation and a radical. However,...
3.3K
Physical Properties of Alcohols and Phenols02:32

Physical Properties of Alcohols and Phenols

14.0K
Alcohols are organic compounds in which a hydroxy group is attached to a saturated carbon. Phenols are a class of alcohols containing a hydroxy group attached to an aromatic ring. The physical properties of the alcohols and phenols are influenced by hydrogen bonding due to the oxygen–hydrogen dipole in the hydroxy functional group and dispersion forces between alkyl or aryl regions of alcohol and phenol molecules.
Alcohols possess a higher boiling point than aliphatic hydrocarbons of...
14.0K
Alcohols from Carbonyl Compounds: Reduction02:23

Alcohols from Carbonyl Compounds: Reduction

10.2K
Reduction is a simple strategy to convert a carbonyl group to a hydroxyl group. The three major pathways to reduce carbonyls to alcohols are catalytic hydrogenation, hydride reduction, and borane reduction.
Catalytic hydrogenation is similar to the reduction of an alkene or alkyne by adding H2 across the pi bond in the presence of transition metal catalysts like Raney Ni, Pd–C, Pt, or Ru. Aldehydes and ketones can be reduced by this method, often under mild to moderate heat (25–100°C) and...
10.2K
Ethers from Alkenes: Alcohol Addition and Alkoxymercuration-Demercuration02:35

Ethers from Alkenes: Alcohol Addition and Alkoxymercuration-Demercuration

7.7K
Overview
Ethers can also be prepared from alkenes through acid-catalyzed addition of alcohols and alkoxymercuration–demercuration.
Preparation of Ethers by Acid-Catalyzed Addition of Alcohol to Alkenes
The acid-catalyzed addition of alcohol to an alkene involves treating the alkene with an excess of alcohol in the presence of an acid catalyst to form an ether under suitable conditions. The hydrogen will add to the less substituted carbon so that the nucleophile can attack the more...
7.7K

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Updated: Jun 4, 2025

Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder
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Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder

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酒精暴露组的酒精暴露组是

Nousha H Sabet1, Todd A Wyatt2

  • 1Department of Internal Medicine, Division of Pulmonary, Critical Care & Sleep, University of Nebraska Medical Center, Omaha, NE, USA; Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE', USA.

Alcohol (Fayetteville, N.Y.)
|December 26, 2024
PubMed
概括
此摘要是机器生成的。

酒精暴露组框架整合了饮食,衰老和共同暴露等多个因素,以全面了解与酒精有关的健康问题. 这种方法超越了孤立的研究,对人类健康有了更全面的看法.

关键词:
酒精饮料 酒精饮料 酒精饮料 酒精饮料伴随性疾病 伴随性疾病外基因组是外基因组的组成部分.暴露组体是指暴露组体.曝光学 (Exposomics) 是一种表现学.细胞外囊泡 细胞外囊泡

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An Inexpensive, Scalable Behavioral Assay for Measuring Ethanol Sedation Sensitivity and Rapid Tolerance in Drosophila
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High-Throughput Method for Measuring Alcohol Sedation Time of Individual Drosophila melanogaster
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An Inexpensive, Scalable Behavioral Assay for Measuring Ethanol Sedation Sensitivity and Rapid Tolerance in Drosophila
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科学领域:

  • 毒理学 毒理学 毒理学
  • 环境健康 环境健康
  • 公共卫生 公共卫生

背景情况:

  • 显子体研究提供了对健康影响的全面观点.
  • 与酒精有关的伤害是复杂的,受到多种因素的影响.

研究的目的:

  • 定义酒精暴露体的关键变量.
  • 将曝光学概念纳入酒精研究中.

主要方法:

  • 确定导致酒精暴露体的主要变量.
  • 检查影响酒精相关损伤的细胞间通信.

主要成果:

  • 关键变量包括并发症 (如吸烟,饮食),环境和职业危险,传染病原体和衰老.
  • 细胞间通信显著影响酒精诱导的组织损伤和代谢物.

结论:

  • 酒精暴露体为了解酒精在现实世界的影响提供了一个框架.
  • 研究应该考虑人类生理学和暴露的非孤立,多变量性质.