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

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
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.0K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.0K
Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

7.7K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
7.7K
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

2.2K
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...
2.2K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

2.5K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
2.5K
Hydrolysis01:15

Hydrolysis

104.2K
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
104.2K

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 author

High-throughput assays for SAM-dependent methyltransferases: advances, challenges, and future perspectives.

Natural product reports·2026
Same author

Reprogramming of bacterial virulence by lysine acetylation.

Nature communications·2026
Same author

Spontaneous efficient degradation of polyesters in soil by an enzyme@MOF platform.

Nature communications·2026
Same author

AcuB senses cellular energy charge to coordinate acetyl-CoA synthesis in bacteria.

Nature communications·2026
Same author

Fructan utilization by members of marine Gammaproteobacteria involves SusC/D-like proteins.

The ISME journal·2026
Same author

Mechanistic Insights into Amide Hydrogenation via Ru-PNNH Metal-Ligand Cooperation: A DFT Study.

The Journal of organic chemistry·2026
Same journal

Engineering Ultrathin Bismuth Nanosheets With Active Facet for Highly Efficient CO<sub>2</sub> Electroreduction to Formate.

ChemSusChem·2026
Same journal

Lanthanum-Induced MnO<sub>2</sub>/Mn<sub>2</sub>O<sub>3</sub> Dual-Phase Heterostructure for Efficient and Stable Acidic Oxygen Evolution.

ChemSusChem·2026
Same journal

Solvent-, Catalyst-, and Heating-Free Mechanochemical Depolymerization of Polyurethane.

ChemSusChem·2026
Same journal

Beyond Single-Active Sites: The Emergence of High-Entropy Perovskites in Energy and Environment Catalysis.

ChemSusChem·2026
Same journal

Sodium Humate Chelating Ferrous Ions in the Aqueous Synthesis of High-Purity Sulfate Cathode Materials for Sustainable Sodium Ion Storage.

ChemSusChem·2026
Same journal

Mechanism-Guided Design Strategies for Stabilizing Ruthenium Oxide Anodes in Proton Exchange Membrane Water Electrolysis.

ChemSusChem·2026
查看所有相关文章

相关实验视频

Updated: Jun 4, 2025

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.2K

混合塑料的单脱聚合使用双酶系统.

Yannick Branson1, Jiawei Liu1,2, Louis Schmidt3

  • 1Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Str. 4, 17489, Greifswald, Germany.

ChemSusChem
|December 23, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种双酶系统,用于在不分类的情况下回收PET,PBAT和TPU等混合塑料. 这种创新方法有效地将混合聚合物脱聚合成单体,促进可持续的废物管理.

关键词:
酶性脱聚合酶化的过程埃斯特拉酶的使用方法混合塑料的混合塑料.塑料混合物塑料混合物尿道化剂的使用

更多相关视频

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
13:38

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture

Published on: May 10, 2013

30.5K
Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
10:22

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Published on: November 30, 2020

3.4K

相关实验视频

Last Updated: Jun 4, 2025

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.2K
Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
13:38

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture

Published on: May 10, 2013

30.5K
Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
10:22

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Published on: November 30, 2020

3.4K

科学领域:

  • 生物技术是生物技术.
  • 聚合物科学 聚合物科学
  • 环境科学 环境科学

背景情况:

  • 全球塑料垃圾是一个重大的环境挑战.
  • 当前的酶回收方法通常需要分类,单一的塑料类型.
  • 需要有效地回收混合或混合塑料.

研究的目的:

  • 用双酶系统研究混合塑料的酶去聚合.
  • 评估一子回收混合聚和聚氨回收的可行性.
  • 探索一种改进的混合聚合物和增强可降解性的方法.

主要方法:

  • 使用了一种双酶系统,其中包括聚化酶 (PES-H1 FY) 和 (多) 尿氨酶 (UMG-SP-2).
  • 脱聚合混合聚合物,包括聚乙烯二甲酸盐 (PET),聚乙烯基酸盐-联合二甲酸盐 (PBAT) 和热塑性聚-聚氨 (TPU) 在一反应中.
  • 采用色谱量化和减肥测量来确定产品的产量.
  • 在聚合物混合中应用了修改后的溶解-沉方法.

主要成果:

  • 在96小时后,单体产品的总产量达到39.8±4.4%.
  • 体重减轻测量证实了降解,观察到40.9±2.5%.
  • 在没有事先分类的情况下,证明了混合PET,PBAT和TPU的成功脱聚合.
  • 通过修改的溶解沉技术,展示了改善的聚合物混合物的可降解性.

结论:

  • 使用双酶系统的混合塑料的酶去聚合是一种可行的回收策略.
  • 这种方法消除了对昂贵而复杂的塑料废物分类的需求.
  • 回收的单体可以被净化用于初始聚合物生产,或用于微生物回收成增值产品.