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相关概念视频

Typical Model Studies01:30

Typical Model Studies

175
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
175
Major Losses in Pipes01:28

Major Losses in Pipes

447
When a fluid flows through a pipe, it experiences energy losses due to frictional resistance along the pipe walls, known as major losses. These energy losses result in a pressure drop, which varies based on the flow conditions — whether laminar or turbulent — and the specific physical properties of the fluid and pipe.
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to...
447
Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

16.5K
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
16.5K

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相关实验视频

Updated: May 17, 2025

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
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胆固醇液晶粗度模型:从统计特征到逆向工程

Ziheng Wang1, Phillip Servio1, Alejandro D Rey1

  • 1Department of Chemical Engineering, McGill University, 3610 University Street, Montréal, Québec H3A 2B2, Canada. alejandro.rey@mcgill.ca.

Soft matter
|May 16, 2025
PubMed
概括

胆固醇液晶表面的几何形状,包括曲率和粗度,影响细胞对齐. 这项研究使用一种异型 anchoring模型来描述这些表面,揭示 anchoring作为纹模式的关键.

科学领域:

  • 材料科学 材料科学 材料科学
  • 生物物理学的生物物理.
  • 表面化学 表面化学

背景情况:

  • 表面几何 (曲率,粗度) 对于生物相容的胆固醇液晶 (CLC) 功能至关重要.
  • 之前的研究经常使用弹性模型,对于异型CLC表面和多尺度纹不够.
  • 人类骨髓衍生 stromal 细胞 (hBMSCs) 显示在 CLC 基质上与曲线对齐.

研究的目的:

  • 描述CLC表面的几何形状,使用一个通用的异型 anchoring模型 (Rapini-Papoular模型).
  • 开发用于表面纹,曲率和粗度分析的分析和数值方法.
  • 调查模型极限并探索用于实验参数确定的反向问题.

主要方法:

  • 概括的异型定模型 (拉皮尼-帕普拉尔模型).
  • 分析近似和直接的数值解决方案.
  • 无坐标的微分几何方法.

主要成果:

  • 表面纹,曲率和粗度配置文件的表征.
  • 探索拉皮尼-帕普勒模型的极限 (kurtosis,威尔莫尔能量).
  • 证明表面定决定了多层次的纹模式.

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Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres
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Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers
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相关实验视频

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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
10:33

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Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres
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Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers
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结论:

  • 表面固是CLC中多尺度纹的主要驱动因素.
  • 拟议的模型提供了关于CLC表面功能和应用的见解.
  • 建立了一个研究CLC动态特性和表面演变的一般框架.