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相关概念视频

Centrifugation01:05

Centrifugation

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Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
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Principle of Linear Impulse and Momentum for a System of Particles01:21

Principle of Linear Impulse and Momentum for a System of Particles

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In the context of a system of particles moving relative to an inertial frame of reference, the equation of motion is a crucial tool for understanding the dynamics of the system. This equation, which accounts for external forces acting on each particle, plays a fundamental role in describing the system's behavior.
Notably, internal forces between particles, occurring in equal and opposite collinear pairs, cancel out and are not part of the equation of motion. This exclusion simplifies the...
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Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

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Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
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Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

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In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
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First Law: Particles in Two-dimensional Equilibrium01:18

First Law: Particles in Two-dimensional Equilibrium

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Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about...
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Microfluidic Buffer Exchange for Interference-free Micro/Nanoparticle Cell Engineering
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基于大小的连续粒子分离,使用惯力和决定性的横向位移.

Yile Xie1, Zichen Wang1, Wenjia Xie1

  • 1Department of Biomedical Engineering, College of Biomedicine, City University of Hong Kong, Hong Kong 999077, China.

Micromachines
|February 27, 2026
PubMed
概括
此摘要是机器生成的。

本研究引入了一种新的微流体装置,用于使用惯性聚焦和确定性横向位移的连续,无标签的粒子分离. 它有效地按大小分类颗粒,为生物医学应用提供了多功能解决方案.

关键词:
确定性的横向移位.惯性力是一种惯性力.颗粒分离器的使用方法

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科学领域:

  • 生物医学工程 生物医学工程
  • 微流体学 微流体学
  • 生物技术是生物技术.

背景情况:

  • 连续,无标签的颗粒分离对于生物化学和生物医学应用至关重要.
  • 现有的方法通常需要外部字段或标签,从而限制了它们的适用性.

研究的目的:

  • 开发一个微流体装置,集成惯性聚焦和确定性横向位移 (DLD) 以基于大小的粒子分类.
  • 为了在层流条件下实现高效和被动的颗粒分离.

主要方法:

  • 一个紧的微流体通道架构,结合了曲线通道和微柱嵌入式曲线通道.
  • 理论分析和数值模拟以优化通道几何和微柱状布局.
  • 使用不同尺寸的玻璃珠 (8微米和15微米) 的实验验证.

主要成果:

  • 该设备实现了基于大小的颗粒分类,分离效率超过93%.
  • 在各种流速和颗粒度中验证了性能.
  • 由离心力和柱子约束驱动的预测尺寸依赖的横向位移.

结论:

  • 开发的微流体装置为被动粒子分类提供了一个简单,经济有效和可扩展的解决方案.
  • 该设计可适应各种应用,包括细胞外囊泡和药物输送载体.
  • 允许无标签,连续的粒子分离,没有外部场.