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相关概念视频

Sternberg's Triangular Theory of Love02:15

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We typically love the people with whom we form relationships, but the type of love we have for our family, friends, and lovers differs. Robert Sternberg (1986) proposed that there are three components of love: intimacy, passion, and commitment. These three components form a triangle that defines multiple types of love: this is known as Sternberg’s triangular theory of love. Intimacy is the sharing of details and intimate thoughts and emotions. Passion is the physical attraction—the...
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The unit rectangular pulse function is mathematically represented by a rectangular function centered at the origin with a height of one unit. This function is defined by two parameters: T, which specifies the center location of the pulse along the time axis, and τ, which determines the pulse duration.
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Topoisomerases are enzymes that relax overwound DNA molecules during various cell processes, including DNA replication and transcription. These enzymes regulate positive and negative DNA supercoiling without changing the nucleotide sequence. DNA overwinding in a clockwise direction results in positively supercoiled DNA, whereas underwinding in a counterclockwise direction produces negatively supercoiled DNA.
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DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
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Designing a Bio-responsive Robot from DNA Origami
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三角形DNA原始

Grigory Tikhomirov1, Philip Petersen2, Lulu Qian1,3

  • 1Bioengineering , California Institute of Technology , Pasadena , California 91125 , United States.

Journal of the American Chemical Society
|December 5, 2018
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概括
此摘要是机器生成的。

研究人员开发了三角形DNA原型,使得3D自组装和外形延伸能够超越2D. 这项创新增强了纳米设备和人工机器的分子模式设计.

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科学领域:

  • 纳米技术
  • 生物技术
  • 材料科学

背景情况:

  • DNA原始利用平面DNA结构作为分子模式的构建块.
  • 之前的方形可以使用随机或决定性的策略来构建二维数组.

研究的目的:

  • 引入三角形DNA原型作为对方形的补充方法.
  • 扩大设计空间并实现DNA的3D自组装.
  • 展示3D和2D结构之间的控制过渡.

主要方法:

  • 在对称三角设计中最大化结合特异性的计算方法.
  • 使用三角构建了一个20的罗姆三角面结构.
  • 通过度,度和折叠对称度,研究了3D和2D结构之间的控制过渡.

主要成果:

  • 通过使用20个三角形DNA原形成功构建了3D形三角面体.
  • 展示了3D和2D配置之间的控制切换.
  • 具有无限和精确设计的二维阵列.

结论:

  • 三角形DNA原型丰富了自组装纳米结构的设计可能性.
  • 这些的可编程性和灵活性是分子机器和纳米设备的理想选择.
  • 这项工作将DNA接能力扩展到3D和复杂的可重新配置系统.