PS Poly:一种链式追踪算法,用于确定持久度长度,并根据形状对复杂聚合物进行分类
Elizabeth A Conley1, Creighton M Lisowski1, Katherine G Schaefer1
1Department of Physics and Astronomy, University of Missouri-Columbia, Columbia, Missouri United States of America.
PloS one
|February 17, 2026
概括
一个新的算法,持久长度形状聚合物 (PS Poly),自动化了从原子力显微镜图像中分析聚合物的形状和刚度. 该工具快速处理数千种聚合物,有助于了解生物分子功能和聚合机制.
科学领域:
- 生物物理学的生物物理.
- 聚合物科学 聚合物科学
- 生物化学 生物化学
背景情况:
- 聚合物如核酸和蛋白质是生命的基础,具有不同的机械特性和形状.
- 持久度长度量化了聚合物曲刚度,而形状 (线性,循环,分支) 对于功能和稳定性至关重要.
- 了解聚合物物理属性对于生物应用至关重要.
研究的目的:
- 介绍持久长度形状聚合物 (PS Poly),一种用于分析聚合物物理属性的新型自动化算法.
- 为了能够从原子力显微镜 (AFM) 图像中快速精确地分析单聚合物分子.
- 为提取聚合物刚性,形状和聚合物的关键信息提供一个通用的工具.
主要方法:
- 开发了PS Poly,一种利用图像骨架和端点/分支点检测的算法.
- 在生理学上相关的流体条件下获得的单分子AFM图像上应用PS Poly.
- 使用良好的特征脱氧核糖核酸 (DNA) 和复杂的候选酶聚合物验证了算法的准确性.
主要成果:
- 在分析聚合物物理属性方面,PS Poly实现了近乎完全的自动化和亚像素精度.
- 该算法成功量化了数千个聚合物分子的持久度长度和形状.
- 通过分析DNA和真菌毒素candidalysin,证明了强度和通用性.
结论:
- PS Poly是一种强大的,可泛化的算法,用于提取基本的聚合物信息.
- 该工具可快速分析聚合物骨干硬度,架构和聚合机制.
- 聚合物聚合物为推动生物物理学和聚合物科学研究提供了巨大的潜力.
相关概念视频
01:17Radical Chain-Growth Polymerization: Chain Branching
2.5K
The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
2.5K
01:14Polymer Classification: Architecture
3.9K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
3.9K
01:24Characteristics and Nomenclature of Copolymers
3.4K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
3.4K
01:08Molecular Weight of Step-Growth Polymers
2.9K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.9K
01:21Polymer Classification: Crystallinity
4.1K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
4.1K
01:10Polymers: Molecular Weight Distribution
4.9K
For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
4.9K