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RNA Editing02:23

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RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
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Classification of Elements and Compounds02:54

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Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond. Elements are classified as atomic or molecular based on the nature of their basic units.
Compounds are pure substances composed of two or more elements in fixed, definite proportions. Compounds are classified as ionic or molecular (covalent) based on the bonds...
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Organic Compounds03:02

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All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
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A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
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Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
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RETRACTED: Wang et al. Integrated Analysis of Physiological and Transcriptional Mechanisms in Response to Drought Stress in <i>Scaevola taccada</i> Seedlings. <i>Plants</i> 2026, <i>15</i>, 970.

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二次元モリブデン・テルリド化合物におけるTe欠乏相のキャプチャと編集

Xiaolong Xu1, Shuangquan Qu1,2, Roger Guzman3

  • 1School of Integrated Circuits and Electronics, MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, Beijing Institute of Technology, Beijing 100081, China.

Journal of the American Chemical Society
|January 28, 2026
PubMed
まとめ

研究者は,新しいTe欠乏性モリブデン・テルリド相を生成するために,ダイナミック・バランス・アプローチを開発した. この欠陥媒介法により,高度な電子機器の精密なフェーズ制御が可能になります.

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科学分野:

  • マテリアルサイエンス 材料科学
  • 固体物理 固体物理学
  • ナノテクノロジー ナノテクノロジー

背景:

  • ステキオメトリック2D材料のフェーズエンジニアリングは,熱力学的な安定性の問題のために困難です.
  • モリブデンテル化物 (Mo-Te) のような材料の相制御は,高度なアプリケーションにとって極めて重要です.

研究 の 目的:

  • Mo-Te システムにおける Te-欠乏多形体へのアクセスを可能にする新しい方法を開発する.
  • ヘテロ構造の製造のためのスケーラブルな合成と相制御を実証する.

主な方法:

  • テルリウム (Te) の空白の生成と補充をバランスさせるために,動的均衡アプローチ (DEA) を利用した.
  • Te-vacancy nucleationとepitaxial templatingによる段階移行を開始しました.
  • ウェファスケール合成とTe空白濃度の正確な制御のためにMoキャピング層を使用しました.

主要な成果:

  • 3つの異なるTe欠乏フェーズMo5Te8,Mo3Te4,Mo6Te6.6を成功裏に合成しました.
  • 原子的に鋭いヘテロ構造のオンデマンド合成を,in situフェーズ編集で達成しました.
  • 均一なTe欠乏相のワファースケールでの製造が実証されています.

結論:

  • Te欠乏相とヘテロ構造にアクセスするための欠陥媒介経路を確立しました.
  • スケーラブル・フェーズ・コントロールによるフェーズ・プログラム可能なエレクトロニクスの可能性を披露した.
  • DEAは,複雑な材料フェーズをエンジニアリングするための汎用的な経路を提供しています.