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関連する概念動画

DNA as a Genetic Template02:05

DNA as a Genetic Template

27.9K
Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
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DNA as a Genetic Template02:05

DNA as a Genetic Template

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Dehydration Synthesis01:15

Dehydration Synthesis

150.5K
Overview
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
Synthesis of carbohydrates
Sugar molecules are covalently linked together by dehydration synthesis. During the reaction, the hydroxyl (-OH) group from...
150.5K
Synthesis and Decomposition Reactions02:17

Synthesis and Decomposition Reactions

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Synthesis and decomposition are two types of redox reactions. Synthesis means to make something, whereas decomposition means to break something. The reactions are accompanied by chemical and energy changes. 
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Transfer RNA Synthesis02:36

Transfer RNA Synthesis

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One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
13.4K
Lagging Strand Synthesis01:59

Lagging Strand Synthesis

61.5K
During replication, the complementary strands in double-stranded DNA are synthesized at different rates. Replication first begins on the leading strand. Replication starts later, occurs more slowly, and proceeds discontinuously on the lagging strand.
There are several major differences between synthesis of the leading strand and synthesis of the lagging strand. 1) Leading strand synthesis happens in the direction of replication fork opening, whereas lagging strand synthesis happens in the...
61.5K

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Updated: Feb 13, 2026

A Salt-Templated Synthesis Method for Porous Platinum-based Macrobeams and Macrotubes
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A Salt-Templated Synthesis Method for Porous Platinum-based Macrobeams and Macrotubes

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カテネンの効率的な多成分活性テンプレート合成

James E M Lewis1, Florian Modicom1, Stephen M Goldup1

  • 1Chemistry , University of Southampton , Highfield , Southampton SO17 1BJ , United Kingdom.

Journal of the American Chemical Society
|March 21, 2018
PubMed
まとめ

この研究は [2]ケテナンの効率的な活性テンプレート合成を導入する. この方法は,クリック化学による機械的結合形成を可能にし,複雑なカタネーン構造の作成を簡素化します.

科学分野:

  • 超分子化学
  • 有機合成

背景:

  • カテネンは 独特のトポロジカルな性質を持つ 機械的に絡み合っている分子です
  • 以前の合成方法はしばしば複雑な手順や低収量を必要とする.

研究 の 目的:

  • 単純で高生産性のアクティブテンプレート合成を開発する [2] .
  • さまざまな前駆者の組み合わせのための方法の汎用性を実証する.

主な方法:

  • メカニカル・ボンド形成のためのアクティブ・テンプレート・ストラテジーを使用します.
  • アジドとアルキンの機能群の間のクリック化学を用いる.
  • シングルプレマクロサイクルとコマクロサイクルの両方のアプローチを調査する.

主要な成果:

  • [2]ケテナンの合成で高い生産性を得ている.
  • ビスアルキンおよびビスアジドコモノマーを用いた成功したマクロサイクライゼーション.
  • サイクリング前にオリゴメリゼーションにつながる短いアルキン/アジド成分への適用性が示された.

結論:

  • 記述された方法は,単純で効率的な経路を [2] catenanes に提供します.

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Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition
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関連する実験動画

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Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition
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Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition

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  • アクティブテンプレートアプローチは,超分子化学における多様な合成戦略に適応できます.