Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.8K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.8K
Initiation of Translation02:33

Initiation of Translation

38.4K
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
38.4K
Initiation of Translation02:33

Initiation of Translation

8.0K
8.0K
Transcription Initiation01:47

Transcription Initiation

20.5K
Initiation is the first step of transcription in eukaryotes. Prokaryotic RNA Polymerase (RNAP) can bind to the template DNA and start transcribing. On the other hand, transcription in eukaryotes requires additional proteins, called transcription factors, to first bind to the promoter region in the DNA template. This binding helps recruit the specific RNAP that can assemble on the DNA and start transcription.
The promoters and enhancers and their accessory proteins allow tight regulation of...
20.5K
Components of Stress01:23

Components of Stress

509
Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
Interestingly, the hidden cube faces also experience these stresses, equal and...
509
Components of Language01:24

Components of Language

776
Language, whether spoken, signed, or written, consists of specific components: lexicon and grammar. The lexicon is the vocabulary of a language, comprising its words. Grammar is the set of rules used to convey meaning through the lexicon. For example, English grammar adds “-ed” to most verbs to indicate past tense. Words are formed by combining phonemes, which are the basic sound units of a language. Different languages have different sets of phonemes (e.g., “ah” vs.
776

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Olefination of Alcohols and Alkyl Halides via Oxidative Alkyl Electrophile-Olefin Metathesis.

Organic letters·2026
Same author

Initiating Photocontrolled Atom Transfer Radical Polymerization from a Redox-Activated Functional Group.

Journal of the American Chemical Society·2026
Same author

Grafting polymer brushes from nylon surfaces <i>via</i> hydrogen atom transfer.

Chemical science·2026
Same author

Surface-Initiated Hydrogen Atom Transfer Reversible Addition-Fragmentation Chain Transfer Polymerization from Isotactic Polypropylene.

Macromolecules·2026
Same author

Leveraging Mechanistic Insights into Stereoretentive ROMP for Precision Synthesis of Poly(<i>p</i>-phenylene vinylene)s.

Journal of the American Chemical Society·2026
Same author

Universal Approach for the Depolymerization of Polyamides via Photothermal Conversion.

Journal of the American Chemical Society·2026
Same journal

Proton-Gated Torsional Spring for Molecular Energy Storage.

Journal of the American Chemical Society·2026
Same journal

Topologically Programmed Dual-Channel Covalent Organic Frameworks Decouple Gas and Ion Fluxes for Acidic CO<sub>2</sub> Electroreduction.

Journal of the American Chemical Society·2026
Same journal

Plasmonic Re-Excitation Enables Superoxide-Mediated Ethane Conversion to Acetic Acid under Visible Light.

Journal of the American Chemical Society·2026
Same journal

Photocatalytic Controlled Halodefluorination of Perfluoroalkyl Compounds Using <i>N</i>-Arylphenothiazines.

Journal of the American Chemical Society·2026
Same journal

Photoinduced Disproportionation Enables Oxidative Addition of Aryl Iodides at a Gallium(I) Center.

Journal of the American Chemical Society·2026
Same journal

Biocatalytic C3 β-<i>O</i>-Glycosylation of Triterpenes and Sterols to Synthesize Natural and Unnatural Saponins.

Journal of the American Chemical Society·2026
関連記事をすべて見る

関連する実験動画

Updated: Jan 23, 2026

Applications of the Single-probe: Mass Spectrometry Imaging and Single Cell Analysis under Ambient Conditions
15:00

Applications of the Single-probe: Mass Spectrometry Imaging and Single Cell Analysis under Ambient Conditions

Published on: June 14, 2016

11.2K

制御されたカチオンポリメリゼーション:環境条件下での単一コンポーネントイニシエーション

Veronika Kottisch1, Jacob O'Leary1, Quentin Michaudel1

  • 1Cornell University , Ithaca , New York 14853 , United States.

Journal of the American Chemical Society
|June 27, 2019
PubMed
まとめ
この要約は機械生成です。

この研究では,ペンタカルボメトキシcyclopentadiene (PCCP) がカチオンポリメリゼーションのための新しいイニシアターとして導入されます. 制御されたビニルエーテルポリメリゼーションを環境条件下で可能にし,鎖末端の高精度でポリマー合成を簡素化します.

さらに関連する動画

Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization
10:54

Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization

Published on: June 19, 2015

10.2K
Analysis of Translation Initiation During Stress Conditions by Polysome Profiling
10:59

Analysis of Translation Initiation During Stress Conditions by Polysome Profiling

Published on: May 19, 2014

18.8K

関連する実験動画

Last Updated: Jan 23, 2026

Applications of the Single-probe: Mass Spectrometry Imaging and Single Cell Analysis under Ambient Conditions
15:00

Applications of the Single-probe: Mass Spectrometry Imaging and Single Cell Analysis under Ambient Conditions

Published on: June 14, 2016

11.2K
Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization
10:54

Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization

Published on: June 19, 2015

10.2K
Analysis of Translation Initiation During Stress Conditions by Polysome Profiling
10:59

Analysis of Translation Initiation During Stress Conditions by Polysome Profiling

Published on: May 19, 2014

18.8K

科学分野:

  • ポリマー化学
  • 有機合成
  • マクロモレキュラー科学

背景:

  • カチオンのポリメリゼーションは精密なマクロ分子合成を提供しますが,低温や無水環境などの厳しい条件を必要とします.
  • 不純物に対する感受性は,しばしば広範な試料の浄化を必要とし,プロセスを複雑にする.

研究 の 目的:

  • 簡素化され,堅固なカチオンのポリメリゼーションの方法を開発する.
  • 環境条件下でビニルエーサーの制御されたポリメリゼーションを達成するために.
  • 厳格なモノマー浄化なしで 鎖末端の高精度を維持する.

主な方法:

  • 単一成分で有機酸を誘発するペンタカルボメトキシcyclopentadiene (PCCP) を利用した.
  • ビニルエーサーの多種多様なライブラリのポリメリゼーションを調査した.
  • 鎖末端に機能的な核愛素が使われています

主要な成果:

  • 環境条件下でPCCPを用いたビニルエーサーの制御されたポリメリゼーションを達成した.
  • 精製されていないモノマーでも優れた連鎖末端の忠誠性を示した.
  • 核好性終結による高収量におけるポリマー鎖末端の機能化に成功した.

結論:

  • PCCPは,ビニルエーサーの環境カチオン性ポリメリゼーションの有効なイニシアターとして作用します.
  • 提案された緊密なイオン複合機構は,観察された生体特性と高精度を説明します.
  • この方法は,制御されたポリマー合成と機能化のための実用的なアプローチを提供します.