Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Alkylation of β-Diester Enolates: Malonic Ester Synthesis01:14

Alkylation of β-Diester Enolates: Malonic Ester Synthesis

3.4K
Malonic ester synthesis is a method to obtain α substituted carboxylic acids from ꞵ-diesters such as diethyl malonate and alkyl halides.
3.4K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

2.3K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.3K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

1.9K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
1.9K
Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

2.6K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
2.6K
Alkylation of β-Ketoester Enolates: Acetoacetic Ester Synthesis01:07

Alkylation of β-Ketoester Enolates: Acetoacetic Ester Synthesis

3.4K
Acetoacetic ester synthesis is a method to obtain ketones from alkyl halides and β-keto esters. The reaction occurs in the presence of an alkoxide base that abstracts the acidic proton of the β-keto esters. The step results in an enolate ion which is doubly stabilized. The enolate then reacts with an alkyl halide via the SN2 process to produce an alkylated ester intermediate with a new C–C bond. The hydrolysis of the intermediate, followed by acidification, results in an...
3.4K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same authorSame journal

Safety Assessment of <i>Melaleuca alternifolia</i> (Tea Tree)-Derived Ingredients as Used in Cosmetics.

International journal of toxicology·2026
Same authorSame journal

Safety Assessment of Radish Root - Derived Ingredients as Used in Cosmetics.

International journal of toxicology·2026
Same authorSame journal

Amended Safety Assessment of Naturally-Sourced Clays as Used in Cosmetics.

International journal of toxicology·2026
Same author

Safety Assessment of Diatomaceous Earth as Used in Cosmetics.

International journal of toxicology·2026
Same author

Safety Assessment of Basic Yellow 87 as Used in Cosmetics.

International journal of toxicology·2026
Same author

Safety Assessment of Glycolactones as Used in Cosmetics.

International journal of toxicology·2026
Same journal

Aldose Reductase Inhibitor, Epalrestat, Suppresses Colorectal Cancer Cell Proliferation Through Complement-Dependent Cytotoxicity.

International journal of toxicology·2026
Same journal

Nonclinical Safety Profiles of mRNA Therapeutics Comprising Unmodified or N1-Methyl-Pseudouridine-Modified Nucleosides Are Similar Following Repeated Administration.

International journal of toxicology·2026
Same journal

Evaluation of the <i>in vitro</i> Toxicity of Novel Oxime Acetylcholinesterase Reactivators.

International journal of toxicology·2026
查看所有相关文章

相关实验视频

Updated: Jul 15, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
11:17

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

21.8K

甲烯酸乙单体 甲烯酸乙单体

Wilbur Johnson1, Wilma F Bergfeld2, Donald V Belsito2

  • 1Cosmetic Ingredient Review Former Senior Scientific Analyst/Writer.

International journal of toxicology
|October 4, 2023
PubMed
概括
此摘要是机器生成的。

化品成分安全专家小组发现22种甲基酸单体安全用于指甲增强产品. 当按照描述使用时,安全性得到确认,并且避免与皮肤接触.

关键词:
2-乙氧乙氧乙基甲基烯酸二氧化乙氧化乙基甲基烯酸.比斯 ((糖二甲基酸盐)) 是一种糖二甲基酸盐.丁基甲基酸 是一种基酸.丁甲基烯酸 (以前称为尿甲基烯酸)化品 化品 化品环基甲酸盐 (前称为环基甲酸盐)二-HEMA 三甲基基二碳酸盐三甲基基二碳酸盐乙氧乙基甲基烯酸乙烯酸乙烯基甲烯酸乙烯基甲烯酸乙烯基乙烯基甲烯酸乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基乙烯基甘二甲酸盐 (以前称为乙烯甘二甲酸盐)HEMA (2-基乙基甲基烯酸盐) 是一种黑马乙酸 (以前称为基乙基甲酸乙酸)基甲基酸盐是什么 基甲基酸盐氧甲基烯酸盐是什么?异布基甲基酸盐是什么?异烯二基比索基基甲烯酸盐 (以前称为异烯二基甲烯酸盐)劳里尔甲基烯酸盐 劳里尔甲基烯酸盐甲酸甲酸甲酸甲氧二甲基醇.PEG-4二甲烯酸二甲酸盐的使用情况皮洛美利特 (以前称为皮洛美利特甘油二甲烯酸盐)安全的安全的安全的安全的安全.甲基烯酸甲基甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸甲基烯酸三乙烯甘二甲烯酸二甲酸三甲.三甲基烯酸三甲基烯酸三甲基烯酸三甲基烯酸三甲基烯酸三甲基烯酸三甲基烯酸三甲.t-丁基甲基酸盐的使用情况

更多相关视频

Polymer Microarrays for High Throughput Discovery of Biomaterials
13:37

Polymer Microarrays for High Throughput Discovery of Biomaterials

Published on: January 25, 2012

14.6K
Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
12:07

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

Published on: April 16, 2018

13.5K

相关实验视频

Last Updated: Jul 15, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
11:17

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

21.8K
Polymer Microarrays for High Throughput Discovery of Biomaterials
13:37

Polymer Microarrays for High Throughput Discovery of Biomaterials

Published on: January 25, 2012

14.6K
Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
12:07

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

Published on: April 16, 2018

13.5K

科学领域:

  • 化品科学 化品科学
  • 皮肤病学 皮肤病学
  • 毒理学 毒理学 毒理学

背景情况:

  • 在指甲制品中甲基酸单体的安全性之前在2005年进行了评估.
  • 自最初评估以来,已有最新的科学文献和产品使用信息.

研究的目的:

  • 重新评估用于化品指甲增强产品中的22种特定甲基烯酸单体的安全性.
  • 根据当前的科学数据和使用模式,提供最新的安全评估.

主要方法:

  • 一个全面的审查新可用的科学研究.
  • 分析关于甲基酸单体的产品类型和使用度的最新信息.
  • 考虑安全的做法和使用条件,包括避免与皮肤接触.

主要成果:

  • 专家小组审查了大量的新数据和更新的使用信息.
  • 22个甲基酸单体在指甲增强产品中的应用背景下进行了评估.
  • 目前的数据支持在特定的使用条件下这些成分的安全性.

结论:

  • 22个甲基酸单体已被证实安全用于指甲增强产品.
  • 根据报告中概述的做法和度使用时,安全性得到保证.
  • 避免与皮肤接触是确保安全使用这些指甲产品成分的关键条件.