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相关概念视频

Polymers02:34

Polymers

35.9K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
35.9K
Characteristics and Nomenclature of Homopolymers01:00

Characteristics and Nomenclature of Homopolymers

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Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
3.1K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.8K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.8K
Nucleic Acids02:43

Nucleic Acids

44.4K
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
44.4K
Composition of Polyprotic Acid Solutions as a Function of pH01:19

Composition of Polyprotic Acid Solutions as a Function of pH

548
Polyprotic acids of the type H2M constitute two ionizable protons. As a result, on titration with a base, they exhibit two equivalence points in the titration curve. During titration, the species H2M, HM−, and M2− will be present in the solution at different points. The fractions of H2M, HM−, and M2− present at the various instances of the titration are denoted by α0, α1, and α2, respectively.
A graph with the alpha values is plotted against the volume of...
548
Nucleic Acids and Nucleotides01:20

Nucleic Acids and Nucleotides

9.1K
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and have instructions for its functioning. The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Deoxyribonucleic Acid (DNA)
DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and the organelles such as chloroplasts and mitochondria....
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Updated: Jul 27, 2025

Facile Protocol for the Synthesis of Self-assembling Polyamine-based Peptide Amphiphiles PPAs and Related Biomaterials
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Facile Protocol for the Synthesis of Self-assembling Polyamine-based Peptide Amphiphiles PPAs and Related Biomaterials

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聚 (A) 烯基的基本组成

Scott Pine1, Reed Flickinger1

  • 1Department of Biological Sciences, State University of New York, Buffalo, N. Y., 14260, USA.

Development, growth & differentiation
|June 7, 2023
PubMed
概括
此摘要是机器生成的。

较高的RNA转录与胚胎和红血细胞中的多基核RNA (poly(A+) 中的AU丰富含量增加相关. 青胚胎中的重复RNA序列也比单复制序列更富含AU.

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Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
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Characterization of Synthetic Polymers via Matrix Assisted Laser Desorption Ionization Time of Flight MALDI-TOF Mass Spectrometry
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相关实验视频

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Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
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Characterization of Synthetic Polymers via Matrix Assisted Laser Desorption Ionization Time of Flight MALDI-TOF Mass Spectrometry
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Characterization of Synthetic Polymers via Matrix Assisted Laser Desorption Ionization Time of Flight MALDI-TOF Mass Spectrometry

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科学领域:

  • 分子生物学分子生物学
  • 细胞生物学 细胞生物学
  • 发展生物学 发展生物学

背景情况:

  • 聚基核RNA (poly(A+) RNA) 在基因表达中起着至关重要的作用.
  • 细胞转录水平在细胞类型和发育阶段之间可以显著不同.
  • RNA的基组成,特别是其腺素 (A) 和 uracil (U) 含量,可以影响RNA的稳定性和功能.

研究的目的:

  • 为了研究转录的多元 (A+) 核RNA数量与其基组成之间的关系.
  • 为了比较在多元 (A+) 核RNA中的重复和单复制序列的AU丰富度.
  • 探索与转录活动相关的RNA组成的潜在差异.

主要方法:

  • 核RNA的多 (A+) 基组组合分析.
  • 核RNA转录水平的Poly (A+) 的量化.
  • 过混合化技术,以区分重复和单复制RNA序列.

主要成果:

  • 与转录水平较低的细胞相比,转录更多数量的多 (A+) 核RNA的细胞表现出更丰富的AU组成.
  • 在青胚胎中,在多个 (A+) 核RNA中的重复序列被发现比单复制序列更富有AU.
  • 这些发现表明RNA数量,序列类型和基组成之间存在联系.

结论:

  • 核RNA中的AU丰富性与更高的转录活性有关.
  • 重复RNA元素可能有助于在活跃转录细胞中观察到的整体AU丰富度.
  • 这种组成差异可能会对RNA处理,稳定性和发育过程中的功能以及疾病状态产生影响.