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相关概念视频

Adherens Junctions01:24

Adherens Junctions

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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
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Types of Membrane Protrusions01:28

Types of Membrane Protrusions

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The protrusion of the cell surface is an initial step for several cellular processes, including cell migration, phagocytosis, and neurite outgrowth. These membrane protrusions are a result of cytoskeletal rearrangement. The most  widely observed cell protrusions include lamellipodia, pseudopodia, filopodia, microvilli, invadopodia, and podosomes. These protrusions can be of two types — static or dynamic.
The microvilli, an example of stable protrusions, are finger-like projections...
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Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

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Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
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Quantifying Bacterial Surface Swarming Motility on Inducer Gradient Plates
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多层繁殖细菌群中的拓缺陷.

Victor Yashunsky1, Daniel J G Pearce2, Gil Ariel3

  • 1The Swiss Institute for Dryland Environmental and Energy Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, 84990 Midreshet Ben-Gurion, Israel. yashunsk@bgu.ac.il.

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概括

这项研究表明,尽管复杂的多层结构,细菌群的动态与二维主动阴性理论保持一致. 细菌群体表现出抑制的长距离密度波动,这种特征被称为超均性.

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Preparation, Imaging, and Quantification of Bacterial Surface Motility Assays
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相关实验视频

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科学领域:

  • 活性物质的物理学 活性物质的物理学
  • 微生物学 微生物学
  • 复杂的系统复杂的系统.

背景情况:

  • 在活跃系统中,拓缺陷至关重要.
  • 细菌群体表现出复杂的,多层次的动态.

研究的目的:

  • 实验性地研究细菌群中的拓缺陷和流动模式.
  • 为了比较实验结果与来自2D主动带尸学理论的预测.
  • 分析多层结构对群体动态的影响.

主要方法:

  • 快速细菌群动态的实验观察.
  • 在拓缺陷周围的流动模式的分析.
  • 实验数据与2D主动阴性学理论模型的比较.

主要成果:

  • 细菌群动力学与二维主动敌人理论一致,即使与理论假设的偏差.
  • 鉴定出了细菌群不同层之间强烈的合.
  • 发现细菌群中的缺陷电荷密度超均,抑制了长距离密度波动.

结论:

  • 二维活体遗传学理论为了解细菌群群提供了一个有价值的框架.
  • 多层结构和层合是自然细菌殖民地的主要特征.
  • 缺陷电荷密度的超均性是细菌群的显著新兴特性.