Wavy nature of collagen fibrils deduced from the dispersion of their second-order nonlinear optical anisotropy parameters ρ.

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ID: 107256
2020
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Abstract
From P-SHG experiments, second-order nonlinear optical anisotropy parameters ρ = χ/χ of collagen tissues are calculated assuming the same model of supercoiled collagen fibril characterized by a variable angle θ. Dispersion of experimental ρ values is converted into distribution of θ values based on the wavy nature of collagen fibrils deduced from EM studies. For tendon, the results show that the dispersion of experimental ρ values is mainly due to Poisson photonic shot noise assuming a slight fibrillar undulation with θ = 2.2 ± 1.8. However for skin and vessels, the dispersion of experimental ρ values is mainly due to a stronger fibrillar undulation with θ = 16.2 ± 1.3. The results highlight that this undulation is reduced during the development of liver fibrosis therefore, contributing to the rigidity of the tissue.
Reference Key
roude2020wavyoptics Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Rouède, Denis;Schaub, Emmanuel;Bellanger, Jean-Jacques;Ezan, Frédéric;Tiaho, François;
Journal Optics express
Year 2020
DOI
10.1364/OE.380089
URL
Keywords Keywords not found

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