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相关概念视频

Multiple Allele Traits01:49

Multiple Allele Traits

The Concept of Multiple Allelism
Reproductive Cloning01:27

Reproductive Cloning

Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic cell—any cell that is not a sex...
Energy Budgets and Reproductive Strategies00:51

Energy Budgets and Reproductive Strategies

Organisms must balance energy intake with the energy required for growth, maintenance, and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species reproduce only once in their lifetime, often investing most available resources into that single reproductive event. Iteroparous species, by contrast, reproduce multiple times over their lifetimes, typically allocating fewer resources to any single...
Multiple Allele Traits01:49

Multiple Allele Traits

The Concept of Multiple Allelism
Reproductive Cloning01:27

Reproductive Cloning

Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic cell—any cell that is not a sex...
Multipotency and Niche of Bulge Stem Cell01:06

Multipotency and Niche of Bulge Stem Cell

A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...

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相关实验视频

Updated: Jul 10, 2026

Generation of Aggregates of Mouse Embryonic Stem Cells that Show Symmetry Breaking, Polarization and Emergent Collective Behaviour In Vitro
11:37

Generation of Aggregates of Mouse Embryonic Stem Cells that Show Symmetry Breaking, Polarization and Emergent Collective Behaviour In Vitro

Published on: November 24, 2015

在多重子生产中的集群概念.

I M Dremin, C Quigg

    Science (New York, N.Y.)
    |March 3, 1978
    PubMed
    概括

    高能粒子碰撞通过哈德龙星团产生多个粒子. 本研究调查了粒子物理学中的集群概念的历史和当前状态.

    科学领域:

    • 高能物理 高能物理
    • 粒子物理学 粒子物理学
    • 量子场理论 量子场理论

    背景情况:

    • 基本粒子碰撞对于理解物质至关重要.
    • 之前的模型试图解释粒子生产机制.

    研究的目的:

    • 概述高能基本粒子碰撞的一般特征.
    • 将集群模型呈现为多重粒子生产的机制.
    • 审查哈德龙星团概念的历史发展和当前地位.

    主要方法:

    • 对高能碰撞的理论框架的审查.
    • 对粒子生产的实验数据的分析.
    • 对集群概念的文献调查.

    主要成果:

    • 高能碰撞显示出复杂的粒子生产模式.
    • 哈德龙星团模型为理解多重粒子生成提供了一个框架.
    • 集群概念随着时间的推移而显著发展.

    结论:

    • 高能碰撞中的多重粒子生成被哈德龙星团模型有效地描述.
    • 集群概念仍然是粒子物理学中一个相关和积极研究的领域.

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    相关实验视频

    Last Updated: Jul 10, 2026

    Generation of Aggregates of Mouse Embryonic Stem Cells that Show Symmetry Breaking, Polarization and Emergent Collective Behaviour In Vitro
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    Generation of Aggregates of Mouse Embryonic Stem Cells that Show Symmetry Breaking, Polarization and Emergent Collective Behaviour In Vitro

    Published on: November 24, 2015

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    Simultaneous Assessment of Kinship, Division Number, and Phenotype via Flow Cytometry for Hematopoietic Stem and Progenitor Cells
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    Published on: March 24, 2023