相关实验视频

Updated: Jul 5, 2025

Super-resolution Imaging of the Bacterial Division Machinery

Super-resolution Imaging of the Bacterial Division Machinery

Published on: January 21, 2013

使用超分辨率显微镜研究当地环境对瓶形状的影响

Jonathan M Chan¹, Avram C Kordon¹, Muzhou Wang¹

¹Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, USA. mwang@northwestern.edu.

|January 17, 2024

概括

用单分子局部化显微镜 (SMLM) 绘制瓶刷聚合物的单链物理图像. 这揭示了聚合物矩阵中更大的骨干灵活性和与侧链分子重量的缩放关系,与理论预测保持一致.

科学领域:

聚合物科学聚合物科学
软物质物理学软物质物理学
宏分子化学宏分子化学

背景情况:

了解单链物理对于玻璃刷聚合物特性至关重要.
之前对线性聚合物矩阵中瓶刷的研究受到表征技术的限制.
与应用相关的拥挤环境需要进一步调查.

研究的目的:

通过使用直接成像,在拥挤的环境中研究瓶刷聚合物构造.
分析链条的灵活性和刚性作为侧链分子重量的函数.
为了比较溶剂膨胀材料和纯瓶刷系统的行为.

主要方法:

单分子定位显微镜 (SMLM) 用于直接成像单个瓶刷聚合物.
测量持久长度 (lp) 来量化链条刚性.
侧链分子量 (Msc) 的变化,以研究其对形状的影响.

主要成果:

与线性聚合物相比,瓶刷聚合物在溶剂膨胀矩阵和纯瓶刷系统中表现出更大的骨干灵活性.
在富含瓶刷的系统中观察到持久度长度和侧链分子量之间的缩放关系,与理论模型相匹配.
高灵活性限制了可视化,需要分析特征尺寸比.

结论:

在复杂的环境中,SMLM提供了直接的洞察力,了解瓶的聚合物构成.
降低热不相容性可以增强骨干的灵活性.
观察到的缩放关系验证了瓶行为理论预测.

更多相关视频

Confocal and Super-Resolution Imaging of Polarized Intracellular Trafficking and Secretion of Basement Membrane Proteins During Drosophila Oogenesis

Confocal and Super-Resolution Imaging of Polarized Intracellular Trafficking and Secretion of Basement Membrane Proteins During Drosophila Oogenesis

Published on: May 19, 2022

Super-Resolution Microscopy of the Synaptonemal Complex Within the Caenorhabditis elegans Germline

Super-Resolution Microscopy of the Synaptonemal Complex Within the Caenorhabditis elegans Germline

Published on: September 13, 2022

相关概念视频

Super-resolution Fluorescence Microscopy

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...

Imaging Biological Samples with Optical Microscopy

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...