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The Tree of Life - Bacteria, Archaea, Eukaryotes02:40

The Tree of Life - Bacteria, Archaea, Eukaryotes

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The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
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Survival Tree01:19

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Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
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Lineage Commitment01:21

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Commitment is the  process whereby stem cells:
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Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
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The Bronchial Tree01:23

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The human bronchi and bronchial tree play a crucial role in the respiratory system, facilitating the exchange of oxygen and carbon dioxide. Let's delve into the intricate structure and functions of these respiratory components.
The trachea, commonly known as the windpipe, is a tube that connects the larynx (voice box) to the bronchi. At a point called the carina, it bifurcates into two primary bronchi. The right primary bronchus is wider, shorter, and more vertical than the left primary...
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Theory of Attribution I: Correspondent Inference Theory01:15

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Correspondent inference theory, proposed by Jones and Davis in 1965, seeks to explain how individuals infer stable personality traits from observed behaviors. It suggests that people attribute actions to underlying dispositions rather than external circumstances, particularly when the behavior appears intentional and socially significant.Voluntary Behavior and Dispositional AttributionAccording to this theory, individuals are more likely to attribute behavior to personal traits when it appears...
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相关实验视频

Updated: Feb 7, 2026

Cell-Lineage Guided Mass Spectrometry Proteomics in the Developing Frog Embryo
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Cell-Lineage Guided Mass Spectrometry Proteomics in the Developing Frog Embryo

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使用LineageMap进行空间解析的细胞血统树的整合推断.

Xinhai Pan, Yiru Chen, Xiuwei Zhang

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    概括
    此摘要是机器生成的。

    使用新的计算方法,LineageMap重建了细胞谱系树和祖先细胞位置. 这种方法整合了基因表达,血统条形码和空间数据,以获得准确的生物学见解.

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    科学领域:

    • 发展生物学 发展生物学
    • 计算生物学 计算生物学
    • 基因组学就是基因组学.

    背景情况:

    • 了解组织生长和细胞分化在生物学中至关重要.
    • 空间解析的谱系追踪为研究这些过程提供了多模式数据 (谱系,基因表达,空间位置).
    • 现有的计算方法缺乏完全整合这三种数据类型用于谱系重建的能力.

    研究的目的:

    • 开发一种结合基因表达,谱系条形码和空间位置数据的计算方法,用于准确的细胞谱系重建.
    • 推断高分辨率的细胞谱系树和祖先细胞状态和位置.
    • 为分析时空细胞动态提供可扩展和可解释的工具.

    主要方法:

    • 介绍了LineageMap,这是一个混合血统推断算法.
    • 在统一的概率框架内集成基于距离和基于概率的方法.
    • 利用空间解析的血统追踪数据,使用三个模式:血统条形码,基因表达档案和空间位置.

    主要成果:

    • 从三模单细胞数据中,LineageMap准确地重建了细胞谱系树和祖先细胞位置.
    • 该算法在模拟和实验数据集上的现有方法相比,显示出更高的准确性.
    • 揭示了生物学上连贯的时空轨迹,进步了对动态细胞祖先的理解.

    结论:

    • LineageMap有效地将分子血统跟踪与空间和转录组信息相结合.
    • 该框架能够在时间和空间上对细胞祖先进行先进的计算重建.
    • 为高分辨率的谱系推断提供了一个可扩展和可解释的工具.