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Periodic Classification of the Elements04:00

Periodic Classification of the Elements

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The periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table, a periodic recurrence of similar electron configurations in the outer shells of these elements is observed. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom...
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This protocol describes an easy and convenient method to label and visualize live chromosomes in mitotic cells using Histone2B-GFP BacMam 2.0 label and a spinning disc confocal microscopy...
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Law of Segregation01:49

Law of Segregation

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When crossing pea plants, Mendel noticed that one of the parental traits would sometimes disappear in the first generation of offspring, called the F1 generation, and could reappear in the next generation (F2). He concluded that one of the traits must be dominant over the other, thereby causing masking of one trait in the F1 generation. When he crossed the F1 plants, he found that 75% of the offspring in the F2 generation had the dominant phenotype, while 25% had the recessive phenotype.
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Elements and Compounds01:27

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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.
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Elements are classified as atomic or molecular based on the nature of their basic units. They are unique forms of matter with specific chemical and physical properties that cannot break down into smaller substances by ordinary chemical reactions. There...
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The Nucleosome Core Particle02:10

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Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
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Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
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Segregation in Fresh Concrete01:16

Segregation in Fresh Concrete

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Segregation in fresh concrete is a phenomenon where the components of the concrete mix separate, leading to uneven distribution and compromised structural integrity. This separation typically occurs when concrete is subjected to excessive horizontal movement within forms, or when it is dropped from considerable heights or forced through narrow, winding paths. As a result, heavier coarse aggregate particles settle at the bottom, while lighter, finer materials such as cement and water rise to the...
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多金属コアシェルのナノプレートにおける元素分離

Faisal Saleem1, Zhicheng Zhang1, Xiaoya Cui1

  • 1Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore.

Journal of the American Chemical Society
|August 30, 2019
PubMed
まとめ
この要約は機械生成です。

研究者はプラチナ・銅・パラジウム・ルテニウムから 新しい卵黄のナノ構造を作りました これらのナノ構造はメタノール酸化の 強化された電気触媒性能を示し,既存の触媒を上回る.

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Periodic Classification of the Elements: s, p, d, f Block Elements
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Monitoring Spatial Segregation in Surface Colonizing Microbial Populations
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科学分野:

  • 材料科学
  • ナノテクノロジー
  • 電気化学

背景:

  • 2次元 (2D) のコアシェルナノ構造は,高度な触媒アプリケーションに不可欠です.
  • 触媒の活性と安定性を高める新しいナノ構造の開発は,依然として重要な課題です.

研究 の 目的:

  • 2Dコアシェルナノプレートにおける要素分離現象を報告する.
  • 独特の卵のナノ構造を合成する
  • メタノール酸化のための合成ナノ構造の電気触媒性能を評価する.

主な方法:

  • PtCu@PdコアシェルのナノプレートをテンプレートとしてPtCuナノプレートを使用して合成する.
  • PtCu@Pdナノプレート上のRuの成長は,選択的元素拡散によってPtCuPd@PdCu@Ruナノプレートにつながります.
  • PdCuの選択的電気化学エッチングにより,PtCuPd@Ruの卵黄のナノ構造が形成されます.

主要な成果:

  • PtCu@PdのコアシェルナノプレートでRuの成長中に観察された元素分離.
  • PtCuPd@Ruの卵黄のナノ構造を成功して合成した.
  • PtCuナノプレートと商用Pt/Cと比較して,メタノールの酸化に対する優れた電解活性と安定性を実証した.

結論:

  • 開発された卵黄のナノ構造は,メタノールの効率的な酸化の可能性を示しています.
  • 合成戦略は,特異な性質を持つ新しいナノ構造への道を提供します.
  • この研究は,電触媒のためのナノ材料の分野を前進させています.