胶原基水凝胶中的布里渊散射

IF 0.48 Q4 Physics and Astronomy
A. V. Laktionova, V. A. Zykova, N. V. Surovtsev
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引用次数: 0

摘要

采用布里渊光谱法研究了不同蛋白质含量(0 ~ 100%)的胶原水凝胶作为生物组织模型体系的粘弹性特性。通过对布里渊光谱的分析,确定了布里渊峰宽(FWHM)和千兆赫弹性模量随水凝胶中蛋白质浓度的变化关系。结果表明,在罗伊斯模型所考虑的全浓度范围内,弹性模量的变化几乎是一个数量级,它的描述精度很高。对布里渊线宽度行为的分析显示,随着蛋白质浓度的增加,FWHM值具有重要的行为(FWHM增加了近8倍),在胶原含量为70%时达到最大值。发现的行为可能是由于水凝胶脱水过程中样品在~ 100 nm尺度上的不均匀性和弛豫谱对布里布鲁因峰的影响造成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Brillouin Scattering in Collagen-Based Hydrogels

Brillouin Scattering in Collagen-Based Hydrogels

Viscoelastic properties of collagen hydrogels with different protein content (from 0 to 100%) was studied by Brillouin spectroscopy as a model system of biological tissue. From the analysis of the Brillouin spectra, the dependencies of the Brillouin peak width (FWHM) and the value of the gigahertz elastic modulus as a function of the protein concentration in the hydrogel were determined. It is shown that the behavior of the elastic modulus, which changes by almost an order of magnitude, is described with good accuracy in the full range of concentrations considered by the Reuss model. Analysis of the behavior of the Brillouin line width revealed a nontrivial behavior of the FWHM value with increasing protein concentration (FWHM increased almost 8 times), with a maximum at a collagen content of ∼70%. The discovered behavior can be caused by both the heterogeneity of the samples on scales of ∼100 nm during hydrogel dehydration and the influence of the relaxation spectrum on the Brillouin peak.

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来源期刊
Bulletin of the Russian Academy of Sciences: Physics
Bulletin of the Russian Academy of Sciences: Physics Physics and Astronomy-Physics and Astronomy (all)
CiteScore
0.90
自引率
0.00%
发文量
251
期刊介绍: Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular,  letters  to  the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics  focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.
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