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相关概念视频

Internal Combustion Engine01:20

Internal Combustion Engine

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The internal combustion engine is a heat engine that uses the byproducts of combustion as the working fluid instead of using a heat transfer medium to transfer heat. The combustion is done in a way that produces high-pressure combustion products that can be expanded through a turbine or piston to create work. Internal combustion engines can again be categorized into three kinds: (1) spark ignition gasoline engines, most commonly used in automobiles, (2) compression ignition diesel engines that...
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Experimental RNAi02:15

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RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
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Nucleic Acid Structure01:25

Nucleic Acid Structure

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The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
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Nucleic Acids02:43

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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.
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Nucleic acids02:43

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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.
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RNA Interference01:23

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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
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相关实验视频

Updated: Feb 28, 2026

DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation
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DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation

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一个可调节的自主RNA驱动的微型发动机.

Kun Wang1, Wenjun Chen2, Buming Guo2

  • 1Department of Physics, New York University, New York, NY, USA. kunwangneu@gmail.com.

Nature communications
|February 25, 2026
PubMed
概括
此摘要是机器生成的。

我们开发了一个可编程的DNA原创引擎,由RNA燃料提供动力. 这台纳米级机器将化学能量转化为机械运动,使微观尺度上的可调节粒子运动成为可能.

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Real-time Imaging of Single Engineered RNA Transcripts in Living Cells Using Ratiometric Bimolecular Beacons
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Folding and Characterization of a Bio-responsive Robot from DNA Origami
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科学领域:

  • 纳米技术 纳米技术
  • 分子工程分子工程分子工程
  • 生物物理学的生物物理.

背景情况:

  • 自主分子机器对于合成纳米系统至关重要.
  • 生物发动机将化学能量转化为机械运动.
  • DNA原始设计为构建纳米级设备提供了一个平台.

研究的目的:

  • 为了构建一个可调节的,以RNA为燃料的DNA原创引擎.
  • 在微观尺度上驱动循环粒子运动.
  • 探索可编程的,自我恢复的分子启动.

主要方法:

  • 使用了序列RNA-DNA杂交和RNase H酶分裂.
  • 设计了一种DNA原形结构,用于循环形态转换.
  • 调节RNA/酶度和温度以控制运动.

主要成果:

  • 实现了可调节的切换动力学,过渡期最短为10秒.
  • 证明了一颗直径为500nm的粒子的循环运动.
  • 确定了控制折叠和展开路径的关键因素.

结论:

  • 以RNA为燃料的DNA原形引擎是一种可编程的,自我恢复的分子执行器.
  • 通过改变RNA序列来实现发动机的可定位性.
  • 为具有生物机器类能力的复杂纳米机械系统提供蓝图.