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相关概念视频

Overview of Transposition and Recombination02:13

Overview of Transposition and Recombination

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Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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Interference: Path Lengths01:10

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Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
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The Distance Formula01:20

The Distance Formula

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In geometry, measuring the direct distance between two points on a plane is essential in various practical and theoretical applications. Whether in navigation, engineering, or computer graphics, determining the shortest path between two locations involves using the distance formula. This formula is derived from the Pythagorean Theorem, which relates the lengths of the sides of a right triangle. On a coordinate plane, the horizontal and vertical distances between two points serve as the legs of...
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Transposons01:24

Transposons

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Transposons, or "jumping genes," are small mobile genetic elements (MGEs) that range from 700 to 40,000 base pairs in length. They are found in all organisms and can move within the same chromosome or transfer to different chromosomes. In some cases, transposons can also jump between different host DNA molecules, such as plasmids or viruses, contributing to genetic variability.Barbara McClintock first discovered these mobile genetic elements in the 1940s while studying maize genetics, and she...
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Problem-Solving: Tuning of a Guitar String01:04

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In the case of stringed instruments like the guitar, the elastic property that determines the speed of the sound produced is its linear mass density or the mass per unit length. This is simply called the linear density. If the string's linear density is constant along the string, then the linear density is simply the total mass divided by the total length.
The string's wave speed can be regulated by varying the linear density. Tension is the other property that determines the speed of...
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Speed of a Transverse Wave01:13

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The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
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Dual DNA Rulers to Study the Mechanism of Ribosome Translocation with Single-Nucleotide Resolution
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两个弦的侧面转位距离为两个弦.

Huixiu Xu, Xin Tong, Haitao Jiang

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    此摘要是机器生成的。

    这项研究引入了用于基因组重排的侧向转换,重点关注具有重复子字符串的字符串. 一个O (n) 算法确定了可变性,但找到最小数量的操作是NP-hard.

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    RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans
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    Determination of the Optimal Chromosomal Locations for a DNA Element in Escherichia coli Using a Novel Transposon-mediated Approach
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    科学领域:

    • 计算生物学 计算生物学
    • 生物信息学是一种生物信息学.
    • 基因组学就是基因组学.

    背景情况:

    • 转换是基因组重组的一个关键机制.
    • 基因组重组通常与重复的DNA序列有关.
    • 侧向转换涉及三个相同的重复子字符串.

    研究的目的:

    • 通过侧面转换来研究将一个字符串转换为另一个字符串.
    • 通过侧面转换建立弦转换的条件.
    • 分析横向转换问题的计算复杂性.

    主要方法:

    • 开发了侧面转换的必要和充分条件.
    • 设计了一个O (n) 决策算法来测试条件.
    • 证明了最小侧面转换问题的NP硬度.
    • 为简单字符串提出了一个O(n^2) 近似算法.

    主要成果:

    • 确定了使用侧面转换的字符串转换的条件.
    • 一个高效的O (n) 算法可以确定转换是否可能.
    • 找到侧面转换的最小数量的问题是NP-hard.
    • 为简单的字符串开发了一个2近似算法.

    结论:

    • 侧向转换为基因组重排分析提供了一个特定的模型.
    • 有效的算法存在于决策问题,但优化仍然具有挑战性.
    • 这项研究为理解复杂的基因组重组提供了理论基础.